Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM1000000028US0
Model Year Start: 2023 Model: Corolla Prod Date Range: [11/2022 - 08/2023]
Title: NETWORKING: CAN COMMUNICATION SYSTEM (for HV Model): TERMINALS OF ECU; 2023 MY Corolla Corolla HV [11/2022 - 08/2023]

TERMINALS OF ECU

NOTICE:

  • After the ignition switch is turned off, there may be a waiting time before disconnecting the negative (-) auxiliary battery terminal.

    Click here 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 -        ]; SETUP: WHEN DISCONNECTING OR RECONNECTING BATTERY TERMINAL: BEFORE DISCONNECTING BATTERY

  • When disconnecting and reconnecting the auxiliary battery.

    HINT:

    When disconnecting and reconnecting the auxiliary battery, there is an automatic learning function that completes learning when the respective system is used.

    Click here 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 -        ]; SETUP: WHEN DISCONNECTING OR RECONNECTING BATTERY TERMINAL: AUTOMATIC LEARNING CHART

  • Before measuring the resistance of the CAN bus, turn the ignition switch off and leave the vehicle for 1 minute or more without operating the key or any switches, or opening or closing the doors. After that, disconnect the cable from the negative (-) auxiliary battery terminal and leave the vehicle for 1 minute or more before measuring the resistance.
  • This section describes the standard values for all CAN related components.

HINT:

  • The systems (ECUs and sensors) that use CAN communication vary depending on the vehicle and optional equipment. Check which systems (ECUs and sensors) are installed to the vehicle.

    Click here 2023 - 2025 MY Corolla Corolla HV [11/2022 -        ]; NETWORKING: CAN COMMUNICATION SYSTEM (for HV Model): DIAGNOSIS SYSTEM

  • Operating the ignition switch, any other switches or a door triggers related ECU and sensor communication on the CAN. This communication will cause the resistance value to change.
  • Even after DTCs are cleared, if a DTC is stored again after driving the vehicle for a while, the malfunction may be occurring due to vibration of the vehicle. In such a case, wiggling the ECUs or wire harness while performing the inspection below may help determine the cause of the malfunction.

NO. 10 CAN JUNCTION CONNECTOR

(a) Check the No. 10 CAN junction connector.

(1) Connection diagram

*a

Front view of wire harness connector

(to No. 10 CAN Junction Connector)

-

-

(2) Check the connection diagram of the components which are connected to the No. 10 CAN junction connector.

Terminal No. (Symbol)

Wiring Color

Connected to

A142-1 (CANH)

LG

Electric brake booster (brake booster with master cylinder assembly)

(for Bus 4)

A142-5 (CANL)

W

A142-2 (CANH)

R

Skid control ECU (brake actuator assembly)

(for Bus 4)

A142-6 (CANL)

W

A142-3 (CANH)

B

No. 13 CAN junction connector

(for Bus 4)

A142-7 (CANL)

W

A142-4 (CANH)

G

Central gateway ECU (network gateway ECU)

(for Bus 4)

A142-8 (CANL)

W

NO. 11 CAN JUNCTION CONNECTOR

(a) Check the No. 11 CAN junction connector.

(1) Connection diagram

*a

Front view of wire harness connector

(to No. 11 CAN Junction Connector)

-

-

(2) Check the connection diagram of the components which are connected to the No. 11 CAN junction connector.

Terminal No. (Symbol)

Wiring Color

Connected to

A147-2 (CANH)

R

Hybrid vehicle control ECU

(for Battery Local Bus)

A147-13 (CANL)

W

A147-3 (CANH)

G

Inverter with converter assembly

(for Battery Local Bus)

A147-14 (CANL)

W

A147-4 (CANH)

B

Battery ECU assembly

(for Battery Local Bus)

A147-15 (CANL)

W

NO. 12 CAN JUNCTION CONNECTOR

(a) Check the No. 12 CAN junction connector.

(1) Connection diagram

*a

Front view of wire harness connector

(to No. 12 CAN Junction Connector)

-

-

(2) Check the connection diagram of the components which are connected to the No. 12 CAN junction connector.

Terminal No. (Symbol)

Wiring Color

Connected to

A148-1 (CANH)

L

Main body ECU (multiplex network body ECU)

(for Bus 5)

A148-5 (CANL)

W

A148-2 (CANH)

G

No. 17 CAN junction connector

(for Bus 5)

A148-6 (CANL)

W

NO. 13 CAN JUNCTION CONNECTOR

(a) Check the No. 13 CAN junction connector.

(1) Connection diagram

*a

Front view of wire harness connector

(to No. 13 CAN Junction Connector)

-

-

(2) Check the connection diagram of the components which are connected to the No. 13 CAN junction connector.

Terminal No. (Symbol)

Wiring Color

Connected to

I187-1 (CANH)

R

Airbag sensor assembly

(for Bus 4)

I187-5 (CANL)

W

I187-2 (CANH)

B

No. 10 CAN junction connector

(for Bus 4)

I187-6 (CANL)

W

I187-3 (CANH)

P

Steering sensor

(for Bus 4)

I187-7 (CANL)

W

I187-4 (CANH)

G

Power steering ECU with motor assembly

(for Bus 4)

I187-8 (CANL)

W

NO. 14 CAN JUNCTION CONNECTOR

(a) Check the No. 14 CAN junction connector.

(1) Connection diagram

*a

Front view of wire harness connector

(to No. 14 CAN Junction Connector)

-

-

(2) Check the connection diagram of the components which are connected to the No. 14 CAN junction connector.

Terminal No. (Symbol)

Wiring Color

Connected to

I223-1 (CANH)

P

Inverter with converter assembly

(for Bus 2)

I223-5 (CANL)

W

I223-2 (CANH)

GR

Hybrid vehicle control ECU

(for Bus 2)

I223-6 (CANL)

W

I223-4 (CANH)

L

Battery ECU assembly

(for Bus 2)

I223-8 (CANL)

W

NO. 15 CAN JUNCTION CONNECTOR

(a) Check the No. 15 CAN junction connector.

(1) Connection diagram

*a

Front view of wire harness connector

(to No. 15 CAN Junction Connector)

-

-

(2) Check the connection diagram of the components which are connected to the No. 15 CAN junction connector.

Terminal No. (Symbol)

Wiring Color

Connected to

I214-1 (CANH)

L

Radio and display receiver assembly

(for Bus 3)

I214-12 (CANL)

W

I214-2 (CANH)

GR

DCM (telematics transceiver)*

(for Bus 3)

I214-13 (CANL)

W

I214-3 (CANH)

G

Central gateway ECU (network gateway ECU)

(for Bus 3)

I214-14 (CANL)

W

I214-4 (CANH)

B

Combination meter assembly

(for Bus 3)

I214-15 (CANL)

W

  • *: w/ Telematics Transceiver

NO. 16 CAN JUNCTION CONNECTOR

(a) Check the No. 16 CAN junction connector.

(1) Connection diagram

*a

Front view of wire harness connector

(to No. 16 CAN Junction Connector)

-

-

(2) Check the connection diagram of the components which are connected to the No. 16 CAN junction connector.

Terminal No. (Symbol)

Wiring Color

Connected to

I215-1 (CANH)

V

Central gateway ECU (network gateway ECU)

(for Bus 6)

I215-7 (CANL)

W

I215-2 (CANH)

B

Central gateway ECU (network gateway ECU)

(for Bus 6)

I215-8 (CANL)

W

I215-3 (CANH)

P

Tire pressure warning ECU and receiver*1

(for Bus 6)

I215-9 (CANL)

W

I215-4 (CANH)

G

Vehicle approaching speaker controller*2

(for Bus 6)

I215-10 (CANL)

W

  • *1: w/ Tire Pressure Warning System
  • *2: w/ Acoustic Vehicle Alerting System

NO. 17 CAN JUNCTION CONNECTOR

(a) Check the No. 17 CAN junction connector.

(1) Connection diagram

*a

Front view of wire harness connector

(to No. 17 CAN Junction Connector)

-

-

(2) Check the connection diagram of the components which are connected to the No. 17 CAN junction connector.

Terminal No. (Symbol)

Wiring Color

Connected to

I216-1 (CANH)

R

Certification ECU (smart key ECU assembly)*

(for Bus 5)

I216-5 (CANL)

W

I216-2 (CANH)

LG

Air conditioning amplifier assembly

(for Bus 5)

I216-6 (CANL)

W

I216-3 (CANH)

B

Central gateway ECU (network gateway ECU)

(for Bus 5)

I216-7 (CANL)

W

I216-4 (CANH)

SB

No. 12 CAN junction connector

(for Bus 5)

I216-8 (CANL)

W

  • *: w/ Smart Key System

NO. 18 CAN JUNCTION CONNECTOR

(a) Check the No. 18 CAN junction connector.

(1) Connection diagram

*a

Front view of wire harness connector

(to No. 18 CAN Junction Connector)

-

-

(2) Check the connection diagram of the components which are connected to the No. 18 CAN junction connector.

Terminal No. (Symbol)

Wiring Color

Connected to

I192-2 (CANH)

GR

Forward recognition camera*1

(for Bus 1)

I192-6 (CANL)

W

I192-2 (CANH)

GR

No. 19 CAN junction connector*2

(for Bus 1)

I192-6 (CANL)

W

I192-3 (CANH)

SB

Central gateway ECU (network gateway ECU)

(for Bus 1)

I192-7 (CANL)

W

  • *1: w/ Front Camera System
  • *2: w/o Front Camera System

NO. 19 CAN JUNCTION CONNECTOR

(a) Check the No. 19 CAN junction connector.

(1) Connection diagram

*a

Front view of wire harness connector

(to No. 19 CAN Junction Connector)

-

-

(2) Check the connection diagram of the components which are connected to the No. 19 CAN junction connector.

Terminal No. (Symbol)

Wiring Color

Connected to

O203-1 (CANH)

BE

Millimeter wave radar sensor assembly*1

(for Bus 1)

O203-5 (CANL)

W

O203-1 (CANH)

BE

No. 18 CAN junction connector*2

(for Bus 1)

O203-5 (CANL)

W

O203-2 (CANH)

R

CAN junction terminal

(for Bus 1)

O203-6 (CANL)

W

O203-3 (CANH)

G

Blind spot monitor sensor LH (B)*3

(for Bus 1)

O203-7 (CANL)

W

  • *1: w/ Front Camera System
  • *2: w/o Front Camera System
  • *3: w/ Blind Spot Monitor System

NO. 33 JUNCTION CONNECTOR

(a) Check the No. 33 junction connector.

(1) Connection diagram

*a

Front view of wire harness connector

(to No. 33 Junction Connector)

-

-

(2) Check the connection diagram of the components which are connected to the No. 33 junction connector.

Terminal No. (Symbol)

Wiring Color

Connected to

A164-1 (CANH)

BE

Electric brake booster (brake booster with master cylinder assembly)

(for Powertrain Local Bus)

A164-5 (CANL)

W

A164-2 (CANH)

L

Hybrid vehicle control ECU

(for Powertrain Local Bus)

A164-6 (CANL)

W

A164-3 (CANH)

R

No. 34 junction connector

(for Powertrain Local Bus)

A164-7 (CANL)

W

NO. 34 JUNCTION CONNECTOR

(a) Check the No. 34 junction connector.

(1) Connection diagram

*a

Front view of wire harness connector

(to No. 34 Junction Connector)

-

-

(2) Check the connection diagram of the components which are connected to the No. 34 junction connector.

Terminal No. (Symbol)

Wiring Color

Connected to

A165-1 (CANH)

V

Inverter with converter assembly

(for Powertrain Local Bus)

A165-5 (CANL)

W

A165-2 (CANH)

LG

Skid control ECU (brake actuator assembly)

(for Powertrain Local Bus)

A165-6 (CANL)

W

A165-3 (CANH)

GR

ECM

(for Powertrain Local Bus)

A165-7 (CANL)

W

A165-4 (CANH)

R

No. 33 junction connector

(for Powertrain Local Bus)

A165-8 (CANL)

W

CAN JUNCTION TERMINAL

(a) Check the CAN junction terminal.

(1) Connection diagram

*a

Front view of wire harness connector

(to CAN Junction Terminal)

-

-

(2) Check the connection diagram of the components which are connected to the CAN junction terminal.

Terminal No. (Symbol)

Wiring Color

Connected to

O95-3 (CANH)

R

No. 19 CAN junction connector

(for Bus 1)

O95-2 (CANL)

W

DLC3

(a) Disconnect the cable from the negative (-) auxiliary battery terminal.

(b) Measure the resistance according to the value(s) in the table below.

*1

DLC3

-

-

Standard Resistance:

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition

I26-6 (CANH) - I26-14 (CANL)

HIGH-level CAN bus line - LOW-level CAN bus line

Cable disconnected from negative (-) auxiliary battery terminal

54 to 69 Ω

I26-6 (CANH) - I26-4 (CG)

HIGH-level CAN bus line - Ground

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

I26-14 (CANL) - I26-4 (CG)

LOW-level CAN bus line - Ground

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

I26-6 (CANH) - I26-16 (BAT)

HIGH-level CAN bus line - Auxiliary battery positive (+)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

I26-14 (CANL) - I26-16 (BAT)

LOW-level CAN bus line - Auxiliary battery positive (+)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)

*a

Component without harness connected

(Central Gateway ECU (Network Gateway ECU))

-

-

(a) Disconnect the cable from the negative (-) auxiliary battery terminal.

(b) Disconnect the I173 central gateway ECU (network gateway ECU) connector.

(c) Measure the resistance according to the value(s) in the table below.

*a

Front view of wire harness connector

(to Central Gateway ECU (Network Gateway ECU))

-

-

Standard Resistance:

Diagnosis Bus Branch Lines (DLC3 - Central gateway ECU (network gateway ECU))

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition

I173-16 (CA6H) - I173-17 (CA6L)

HIGH-level CAN bus line - LOW-level CAN bus line

Cable disconnected from negative (-) auxiliary battery terminal

1 MΩ or higher

I173-16 (CA6H) - I173-22 (GND)

HIGH-level CAN bus line - Ground

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

I173-17 (CA6L) - I173-22 (GND)

LOW-level CAN bus line - Ground

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

I173-16 (CA6H) - I173-1 (BATT)

HIGH-level CAN bus line - Auxiliary battery positive (+)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

I173-17 (CA6L) - I173-1 (BATT)

LOW-level CAN bus line - Auxiliary battery positive (+)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

Bus 1 Main Lines

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition

I173-28 (CA1H) - I173-27 (CA1L)

HIGH-level CAN bus line - LOW-level CAN bus line

Cable disconnected from negative (-) auxiliary battery terminal

108 to 132 Ω

I173-28 (CA1H) - I173-22 (GND)

HIGH-level CAN bus line - Ground

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

I173-27 (CA1L) - I173-22 (GND)

LOW-level CAN bus line - Ground

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

I173-28 (CA1H) - I173-1 (BATT)

HIGH-level CAN bus line - Auxiliary battery positive (+)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

I173-27 (CA1L) - I173-1 (BATT)

LOW-level CAN bus line - Auxiliary battery positive (+)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

Bus 2 Main Lines

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition

I173-26 (CA4H) - I173-25 (CA4L)

HIGH-level CAN bus line - LOW-level CAN bus line

Cable disconnected from negative (-) auxiliary battery terminal

108 to 132 Ω

I173-26 (CA4H) - I173-22 (GND)

HIGH-level CAN bus line - Ground

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

I173-25 (CA4L) - I173-22 (GND)

LOW-level CAN bus line - Ground

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

I173-26 (CA4H) - I173-1 (BATT)

HIGH-level CAN bus line - Auxiliary battery positive (+)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

I173-25 (CA4L) - I173-1 (BATT)

LOW-level CAN bus line - Auxiliary battery positive (+)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

Bus 3 Main Lines

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition

I173-30 (CA3H) - I173-29 (CA3L)

HIGH-level CAN bus line - LOW-level CAN bus line

Cable disconnected from negative (-) auxiliary battery terminal

108 to 132 Ω

I173-30 (CA3H) - I173-22 (GND)

HIGH-level CAN bus line - Ground

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

I173-29 (CA3L) - I173-22 (GND)

LOW-level CAN bus line - Ground

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

I173-30 (CA3H) - I173-1 (BATT)

HIGH-level CAN bus line - Auxiliary battery positive (+)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

I173-29 (CA3L) - I173-1 (BATT)

LOW-level CAN bus line - Auxiliary battery positive (+)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

Bus 4 Main Lines

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition

I173-24 (CA2H) - I173-23 (CA2L)

HIGH-level CAN bus line - LOW-level CAN bus line

Cable disconnected from negative (-) auxiliary battery terminal

108 to 132 Ω

I173-24 (CA2H) - I173-22 (GND)

HIGH-level CAN bus line - Ground

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

I173-23 (CA2L) - I173-22 (GND)

LOW-level CAN bus line - Ground

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

I173-24 (CA2H) - I173-1 (BATT)

HIGH-level CAN bus line - Auxiliary battery positive (+)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

I173-23 (CA2L) - I173-1 (BATT)

LOW-level CAN bus line - Auxiliary battery positive (+)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

Bus 5 Main Lines

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition

I173-7 (CA5H) - I173-8 (CA5L)

HIGH-level CAN bus line - LOW-level CAN bus line

Cable disconnected from negative (-) auxiliary battery terminal

108 to 132 Ω

I173-7 (CA5H) - I173-22 (GND)

HIGH-level CAN bus line - Ground

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

I173-8 (CA5L) - I173-22 (GND)

LOW-level CAN bus line - Ground

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

I173-7 (CA5H) - I173-1 (BATT)

HIGH-level CAN bus line - Auxiliary battery positive (+)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

I173-8 (CA5L) - I173-1 (BATT)

LOW-level CAN bus line - Auxiliary battery positive (+)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

Bus 6 Main Lines

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition

I173-31 (CA7H) - I173-10 (CAVH)

HIGH-level CAN bus line - HIGH-level CAN bus line

Cable disconnected from negative (-) auxiliary battery terminal

Below 1 Ω

I173-32 (CA7L) - I173-11 (CAVL)

LOW-level CAN bus line - LOW-level CAN bus line

Cable disconnected from negative (-) auxiliary battery terminal

Below 1 Ω

I173-31 (CA7H) - I173-22 (GND)

HIGH-level CAN bus line - Ground

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

I173-32 (CA7L) - I173-22 (GND)

LOW-level CAN bus line - Ground

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

I173-31 (CA7H) - I173-1 (BATT)

HIGH-level CAN bus line - Auxiliary battery positive (+)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

I173-32 (CA7L) - I173-1 (BATT)

LOW-level CAN bus line - Auxiliary battery positive (+)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

Bus 7 Main Lines

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition

I173-5 (CA8H) - I173-6 (CA8L)

HIGH-level CAN bus line - LOW-level CAN bus line

Cable disconnected from negative (-) auxiliary battery terminal

108 to 132 Ω

I173-5 (CA8H) - I173-22 (GND)

HIGH-level CAN bus line - Ground

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

I173-6 (CA8L) - I173-22 (GND)

LOW-level CAN bus line - Ground

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

I173-5 (CA8H) - I173-1 (BATT)

HIGH-level CAN bus line - Auxiliary battery positive (+)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

I173-6 (CA8L) - I173-1 (BATT)

LOW-level CAN bus line - Auxiliary battery positive (+)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

STEERING SENSOR

*a

Component without harness connected

(Steering Sensor)

-

-

(a) Disconnect the cable from the negative (-) auxiliary battery terminal.

(b) Disconnect the I211 steering sensor connector.

(c) Measure the resistance according to the value(s) in the table below.

*a

Front view of wire harness connector

(to Steering Sensor)

Standard Resistance:

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition

I211-3 (CANH) - I211-8 (CANL)

HIGH-level CAN bus line - LOW-level CAN bus line

Cable disconnected from negative (-) auxiliary battery terminal

54 to 69 Ω

I211-3 (CANH) - I211-6 (ESS)

HIGH-level CAN bus line - Ground

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

I211-8 (CANL) - I211-6 (ESS)

LOW-level CAN bus line - Ground

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

I211-3 (CANH) - I211-4 (BAT)

HIGH-level CAN bus line - Auxiliary battery positive (+)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

I211-8 (CANL) - I211-4 (BAT)

LOW-level CAN bus line - Auxiliary battery positive (+)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

HYBRID VEHICLE CONTROL ECU

Refer to Terminals of ECU.

Click here 2023 - 2025 MY Corolla HV [09/2022 -        ]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for LITHIUM-ION BATTERY with PA10): TERMINALS OF ECU

(a) Disconnect the cable from the negative (-) auxiliary battery terminal.

(b) Disconnect the I3 hybrid vehicle control ECU connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Bus 2 Branch Lines

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition

I3-51 (CA1H) - I3-52 (CA1L)

HIGH-level CAN bus line - LOW-level CAN bus line

Cable disconnected from negative (-) auxiliary battery terminal

54 to 69 Ω

I3-51 (CA1H) - I3-1 (E1)

HIGH-level CAN bus line - Ground

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

I3-52 (CA1L) - I3-1 (E1)

LOW-level CAN bus line - Ground

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

I3-51 (CA1H) - I3-13 (BATT)

HIGH-level CAN bus line - Auxiliary battery positive (+)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

I3-52 (CA1L) - I3-13 (BATT)

LOW-level CAN bus line - Auxiliary battery positive (+)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

Battery Local Bus Main Lines

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition

I3-9 (CA4H) - I3-22 (CA4L)

HIGH-level CAN bus line - LOW-level CAN bus line

Cable disconnected from negative (-) auxiliary battery terminal

108 to 132 Ω

I3-9 (CA4H) - I3-1 (E1)

HIGH-level CAN bus line - Ground

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

I3-22 (CA4L) - I3-1 (E1)

LOW-level CAN bus line - Ground

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

I3-9 (CA4H) - I3-13 (BATT)

HIGH-level CAN bus line - Auxiliary battery positive (+)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

I3-22 (CA4L) - I3-13 (BATT)

LOW-level CAN bus line - Auxiliary battery positive (+)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

Powertrain Local Bus Main Lines

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition

I3-50 (CA3P) - I3-49 (CA3N)

HIGH-level CAN bus line - LOW-level CAN bus line

Cable disconnected from negative (-) auxiliary battery terminal

108 to 132 Ω

I3-50 (CA3P) - I3-1 (E1)

HIGH-level CAN bus line - Ground

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

I3-49 (CA3N) - I3-1 (E1)

LOW-level CAN bus line - Ground

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

I3-50 (CA3P) - I3-13 (BATT)

HIGH-level CAN bus line - Auxiliary battery positive (+)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

I3-49 (CA3N) - I3-13 (BATT)

LOW-level CAN bus line - Auxiliary battery positive (+)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

*a

Front view of wire harness connector

(to Hybrid Vehicle Control ECU)

INVERTER WITH CONVERTER ASSEMBLY

Refer to Terminals of ECU.

Click here 2023 - 2025 MY Corolla HV [09/2022 -        ]; HYBRID / BATTERY CONTROL: MOTOR GENERATOR CONTROL SYSTEM (for LITHIUM-ION BATTERY with PA10): TERMINALS OF ECU

(a) Disconnect the cable from the negative (-) auxiliary battery terminal.

(b) Disconnect the A155 inverter with converter assembly connector.

(c) Measure the resistance according to the value(s) in the table below.

*1

DLC3

-

-

*a

Front view of wire harness connector

(to Inverter with Converter Assembly)

-

-

Standard Resistance:

Bus 2 Main Lines

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition

A155-5 (CANH) - A155-6 (CANL)

HIGH-level CAN bus line - LOW-level CAN bus line

Cable disconnected from negative (-) auxiliary battery terminal

108 to 132 Ω

A155-5 (CANH) - I26-4 (CG)

HIGH-level CAN bus line - Ground

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

A155-6 (CANL) - I26-4 (CG)

LOW-level CAN bus line - Ground

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

A155-5 (CANH) - I26-16 (BAT)

HIGH-level CAN bus line - Auxiliary battery positive (+)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

A155-6 (CANL) - I26-16 (BAT)

LOW-level CAN bus line - Auxiliary battery positive (+)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

A155-13 (CADH) - A155-14 (CADL)

HIGH-level CAN bus line - LOW-level CAN bus line

Cable disconnected from negative (-) auxiliary battery terminal

108 to 132 Ω

A155-13 (CADH) - I26-4 (CG)

HIGH-level CAN bus line - Ground

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

A155-14 (CADL) - I26-4 (CG)

LOW-level CAN bus line - Ground

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

A155-13 (CADH) - I26-16 (BAT)

HIGH-level CAN bus line - Auxiliary battery positive (+)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

A155-14 (CADL) - I26-16 (BAT)

LOW-level CAN bus line - Auxiliary battery positive (+)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

Powertrain Local Bus Branch Lines

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition

A155-3 (CALH) - A155-11 (CALL)

HIGH-level CAN bus line - LOW-level CAN bus line

Cable disconnected from negative (-) auxiliary battery terminal

54 to 69 Ω

A155-3 (CALH) - I26-4 (CG)

HIGH-level CAN bus line - Ground

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

A155-11 (CALL) - I26-4 (CG)

LOW-level CAN bus line - Ground

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

A155-3 (CALH) - I26-16 (BAT)

HIGH-level CAN bus line - Auxiliary battery positive (+)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

A155-11 (CALL) - I26-16 (BAT)

LOW-level CAN bus line - Auxiliary battery positive (+)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

(d) Disconnect the A156 inverter with converter assembly connector.

(e) Measure the resistance according to the value(s) in the table below.

*1

DLC3

-

-

*a

Front view of wire harness connector

(to Inverter with Converter Assembly)

-

-

Standard Resistance:

Battery Local Bus Branch Lines

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition

A156-5 (CNH) - A156-4 (CNL)

HIGH-level CAN bus line - LOW-level CAN bus line

Cable disconnected from negative (-) auxiliary battery terminal

54 to 69 Ω

A156-5 (CNH) - I26-4 (CG)

HIGH-level CAN bus line - Ground

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

A156-4 (CNL) - I26-4 (CG)

LOW-level CAN bus line - Ground

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

A156-5 (CNH) - I26-16 (BAT)

HIGH-level CAN bus line - Auxiliary battery positive (+)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

A156-4 (CNL) - I26-16 (BAT)

LOW-level CAN bus line - Auxiliary battery positive (+)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

ECM

Refer to Terminals of ECU.

Click here 2023 - 2025 MY Corolla Corolla HV [09/2022 -        ]; 2ZR-FXE (ENGINE CONTROL): SFI SYSTEM: TERMINALS OF ECM

(a) Disconnect the cable from the negative (-) auxiliary battery terminal.

(b) Disconnect the A46 ECM connector.

(c) Measure the resistance according to the value(s) in the table below.

*a

Front view of wire harness connector

(to ECM)

Standard Resistance:

Bus 2 Main Lines

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition

A46-9 (CFDH) - A46-10 (CFDL)

HIGH-level CAN bus line - LOW-level CAN bus line

Cable disconnected from negative (-) auxiliary battery terminal

108 to 132 Ω

A46-9 (CFDH) - A46-17 (E1)

HIGH-level CAN bus line - Ground

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

A46-10 (CFDL) - A46-17 (E1)

LOW-level CAN bus line - Ground

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

A46-9 (CFDH) - A46-1 (BATT)

HIGH-level CAN bus line - Auxiliary battery positive (+)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

A46-10 (CFDL) - A46-1 (BATT)

LOW-level CAN bus line - Auxiliary battery positive (+)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

Powertrain Local Bus Branch Lines

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition

A46-11 (CFDT) - A46-12 (CFDB)

HIGH-level CAN bus line - LOW-level CAN bus line

Cable disconnected from negative (-) auxiliary battery terminal

54 to 69 Ω

A46-11 (CFDT) - A46-17 (E1)

HIGH-level CAN bus line - Ground

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

A46-12 (CFDB) - A46-17 (E1)

LOW-level CAN bus line - Ground

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

A46-11 (CFDT) - A46-1 (BATT)

HIGH-level CAN bus line - Auxiliary battery positive (+)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

A46-12 (CFDB) - A46-1 (BATT)

LOW-level CAN bus line - Auxiliary battery positive (+)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

COMBINATION METER ASSEMBLY

Refer to Terminals of ECU.

Click here 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 -        ]; METER / GAUGE / DISPLAY: METER / GAUGE SYSTEM (except 12.3 Inch Display): TERMINALS OF ECU

(a) Disconnect the cable from the negative (-) auxiliary battery terminal.

(b) Disconnect the I4 and I5 combination meter assembly connectors.

(c) Measure the resistance according to the value(s) in the table below.

*a

Front view of wire harness connector

(to Combination Meter Assembly)

-

-

Standard Resistance:

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition

I5-31 (CANH) - I5-14 (CANL)

HIGH-level CAN bus line - LOW-level CAN bus line

Cable disconnected from negative (-) auxiliary battery terminal

108 to 132 Ω

I5-31 (CANH) - I4-2 (ES)

HIGH-level CAN bus line - Ground

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

I5-14 (CANL) - I4-2 (ES)

LOW-level CAN bus line - Ground

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

I5-31 (CANH) - I5-2 (B)

HIGH-level CAN bus line - Auxiliary battery positive (+)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

I5-14 (CANL) - I5-2 (B)

LOW-level CAN bus line - Auxiliary battery positive (+)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

ELECTRIC BRAKE BOOSTER (BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY)

Refer to Terminals of ECU.

Click here 2023 - 2025 MY Corolla Corolla HV [09/2022 -        ]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for HV Model): TERMINALS OF ECU

(a) Disconnect the cable from the negative (-) auxiliary battery terminal.

(b) Disconnect the A157 electric brake booster (brake booster with master cylinder assembly) connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Bus 4 Branch Lines

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition

A157-2 (CA1H) - A157-12 (CA1L)

HIGH-level CAN bus line - LOW-level CAN bus line

Cable disconnected from negative (-) auxiliary battery terminal

54 to 69 Ω

A157-2 (CA1H) - A157-26 (GND)

HIGH-level CAN bus line - Ground

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

A157-12 (CA1L) - A157-26 (GND)

LOW-level CAN bus line - Ground

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

A157-2 (CA1H) - A157-11 (+BS)

HIGH-level CAN bus line - Auxiliary battery positive (+)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

A157-12 (CA1L) - A157-11 (+BS)

LOW-level CAN bus line - Auxiliary battery positive (+)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

Powertrain Local Bus Branch Lines

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition

A157-9 (CA2H) - A157-18 (CA2L)

HIGH-level CAN bus line - LOW-level CAN bus line

Cable disconnected from negative (-) auxiliary battery terminal

54 to 69 Ω

A157-9 (CA2H) - A157-26 (GND)

HIGH-level CAN bus line - Ground

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

A157-18 (CA2L) - A157-26 (GND)

LOW-level CAN bus line - Ground

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

A157-9 (CA2H) - A157-11 (+BS)

HIGH-level CAN bus line - Auxiliary battery positive (+)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

A157-18 (CA2L) - A157-11 (+BS)

LOW-level CAN bus line - Auxiliary battery positive (+)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

*a

Front view of wire harness connector

(to Electric Brake Booster (Brake Booster with Master Cylinder Assembly))

SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY)

Refer to Terminals of ECU.

Click here 2023 - 2025 MY Corolla Corolla HV [09/2022 -        ]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for HV Model): TERMINALS OF ECU

(a) Disconnect the cable from the negative (-) auxiliary battery terminal.

(b) Disconnect the A51 skid control ECU (brake actuator assembly) connector.

(c) Measure the resistance according to the value(s) in the table below.

*a

Front view of wire harness connector

(to Skid Control ECU (Brake Actuator Assembly))

Standard Resistance:

Bus 4 Branch Lines

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition

A51-5 (CANH) - A51-19 (CANL)

HIGH-level CAN bus line - LOW-level CAN bus line

Cable disconnected from negative (-) auxiliary battery terminal

54 to 69 Ω

A51-5 (CANH) - A51-14 (GND2)

HIGH-level CAN bus line - Ground

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

A51-19 (CANL) - A51-14 (GND2)

LOW-level CAN bus line - Ground

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

A51-5 (CANH) - A51-1 (+BM)

HIGH-level CAN bus line - Auxiliary battery positive (+)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

A51-19 (CANL) - A51-1 (+BM)

LOW-level CAN bus line - Auxiliary battery positive (+)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

Powertrain Local Bus Main Lines

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition

A51-11 (CA2H) - A51-25 (CA2L)

HIGH-level CAN bus line - LOW-level CAN bus line

Cable disconnected from negative (-) auxiliary battery terminal

108 to 132 Ω

A51-11 (CA2H) - A51-14 (GND2)

HIGH-level CAN bus line - Ground

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

A51-25 (CA2L) - A51-14 (GND2)

LOW-level CAN bus line - Ground

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

A51-11 (CA2H) - A51-1 (+BM)

HIGH-level CAN bus line - Auxiliary battery positive (+)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

A51-25 (CA2L) - A51-1 (+BM)

LOW-level CAN bus line - Auxiliary battery positive (+)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

Refer to Terminals of ECU.

Click here 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 -        ]; LIGHTING (EXT): LIGHTING SYSTEM: TERMINALS OF ECU

(a) Disconnect the cable from the negative (-) auxiliary battery terminal.

(b) Disconnect the I85 main body ECU (multiplex network body ECU) connector.

(c) Measure the resistance according to the value(s) in the table below.

*1

DLC3

-

-

*a

Front view of wire harness connector

(to Main Body ECU (Multiplex Network Body ECU))

-

-

Standard Resistance:

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition

I85-2 (CANH) - I85-1 (CANL)

HIGH-level CAN bus line - LOW-level CAN bus line

Cable disconnected from negative (-) auxiliary battery terminal

108 to 132 Ω

I85-2 (CANH) - I26-4 (CG)

HIGH-level CAN bus line - Ground

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

I85-1 (CANL) - I26-4 (CG)

LOW-level CAN bus line - Ground

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

I85-2 (CANH) - I26-16 (BAT)

HIGH-level CAN bus line - Auxiliary battery positive (+)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

I85-1 (CANL) - I26-16 (BAT)

LOW-level CAN bus line - Auxiliary battery positive (+)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

Refer to Terminals of ECU.

Click here 2023 - 2025 MY Corolla Corolla HV [11/2022 -        ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, HV Model): TERMINALS OF ECU

(a) Disconnect the cable from the negative (-) auxiliary battery terminal.

(b) Disconnect the I167 certification ECU (smart key ECU assembly) connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition

I167-1 (CANH) - I167-2 (CANL)

HIGH-level CAN bus line - LOW-level CAN bus line

Cable disconnected from negative (-) auxiliary battery terminal

54 to 69 Ω

I167-1 (CANH) - I167-29 (E)

HIGH-level CAN bus line - Ground

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

I167-2 (CANL) - I167-29 (E)

LOW-level CAN bus line - Ground

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

I167-1 (CANH) - I167-6 (+B)

HIGH-level CAN bus line - Auxiliary battery positive (+)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

I167-2 (CANL) - I167-6 (+B)

LOW-level CAN bus line - Auxiliary battery positive (+)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

*a

Front view of wire harness connector

(to Certification ECU (Smart Key ECU Assembly))

POWER STEERING ECU WITH MOTOR ASSEMBLY

Refer to Terminals of ECU.

Click here 2023 - 2025 MY Corolla Corolla HV [09/2022 -        ]; POWER ASSIST SYSTEMS: POWER STEERING SYSTEM (for HV Model): TERMINALS OF ECU

(a) Disconnect the cable from the negative (-) auxiliary battery terminal.

(b) Disconnect the I21 and I42 power steering ECU with motor assembly connectors.

(c) Measure the resistance according to the value(s) in the table below.

*a

Front view of wire harness connector

(to Power Steering ECU with Motor Assembly)

-

-

Standard Resistance:

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition

I21-7 (CANH) - I21-8 (CANL)

HIGH-level CAN bus line - LOW-level CAN bus line

Cable disconnected from negative (-) auxiliary battery terminal

108 to 132 Ω

I21-7 (CANH) - I42-2 (PGND)

HIGH-level CAN bus line - Ground

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

I21-8 (CANL) - I42-2 (PGND)

LOW-level CAN bus line - Ground

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

I21-7 (CANH) - I42-1 (PIG)

HIGH-level CAN bus line - Auxiliary battery positive (+)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

I21-8 (CANL) - I42-1 (PIG)

LOW-level CAN bus line - Auxiliary battery positive (+)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

AIRBAG SENSOR ASSEMBLY

Refer to Terminals of ECU.

Click here 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 -        ]; SUPPLEMENTAL RESTRAINT SYSTEMS: AIRBAG SYSTEM: TERMINALS OF ECU

(a) Disconnect the cable from the negative (-) auxiliary battery terminal.

(b) Disconnect the I47 airbag sensor assembly connector.

(c) Measure the resistance according to the value(s) in the table below.

*1

DLC3

-

-

*a

Front view of wire harness connector

(to Airbag Sensor Assembly)

-

-

Standard Resistance:

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition

I47-26 (CAFH) - I47-27 (CAFL)

HIGH-level CAN bus line - LOW-level CAN bus line

Cable disconnected from negative (-) auxiliary battery terminal

54 to 69 Ω

I47-26 (CAFH) - I47-33 (E1)

HIGH-level CAN bus line - Ground

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

I47-27 (CAFL) - I47-33 (E1)

LOW-level CAN bus line - Ground

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

I47-26 (CAFH) - I26-16 (BAT)

HIGH-level CAN bus line - Auxiliary battery positive (+)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

I47-27 (CAFL) - I26-16 (BAT)

LOW-level CAN bus line - Auxiliary battery positive (+)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

AIR CONDITIONING AMPLIFIER ASSEMBLY

Refer to Terminals of ECU.

Click here 2023 - 2025 MY Corolla Corolla HV [09/2022 -        ]; HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for HV Model): TERMINALS OF ECU

(a) Disconnect the cable from the negative (-) auxiliary battery terminal.

(b) Disconnect the I49 air conditioning amplifier assembly connector.

(c) Measure the resistance according to the value(s) in the table below.

*a

Front view of wire harness connector

(to Air Conditioning Amplifier Assembly)

Standard Resistance:

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition

I49-2 (CANH) - I49-1 (CANL)

HIGH-level CAN bus line - LOW-level CAN bus line

Cable disconnected from negative (-) auxiliary battery terminal

54 to 69 Ω

I49-2 (CANH) - I49-17 (GND)

HIGH-level CAN bus line - Ground

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

I49-1 (CANL) - I49-17 (GND)

LOW-level CAN bus line - Ground

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

I49-2 (CANH) - I49-5 (B)

HIGH-level CAN bus line - Auxiliary battery positive (+)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

I49-1 (CANL) - I49-5 (B)

LOW-level CAN bus line - Auxiliary battery positive (+)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

BLIND SPOT MONITOR SENSOR LH (B) (w/ Blind Spot Monitor System)

Refer to Terminals of ECU.

Click here 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 -        ]; PARK ASSIST / MONITORING: BLIND SPOT MONITOR SYSTEM (w/ Safe Exit Assist Function): TERMINALS OF ECU

(a) Disconnect the cable from the negative (-) auxiliary battery terminal.

(b) Disconnect the O57 blind spot monitor sensor LH (B) connector.

(c) Measure the resistance according to the value(s) in the table below.

*1

DLC3

-

-

*a

Front view of wire harness connector

(to Blind Spot Monitor Sensor LH (B))

-

-

Standard Resistance:

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition

O57-2 (CA1P) - O57-7 (CA1N)

HIGH-level CAN bus line - LOW-level CAN bus line

Cable disconnected from negative (-) auxiliary battery terminal

54 to 69 Ω

O57-2 (CA1P) - O57-10 (BLGD)

HIGH-level CAN bus line - Ground

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

O57-7 (CA1N) - O57-10 (BLGD)

LOW-level CAN bus line - Ground

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

O57-2 (CA1P) - I26-16 (BAT)

HIGH-level CAN bus line - Auxiliary battery positive (+)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

O57-7 (CA1N) - I26-16 (BAT)

LOW-level CAN bus line - Auxiliary battery positive (+)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

FORWARD RECOGNITION CAMERA (w/ Front Camera System)

Refer to Terminals of ECU.

Click here 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 - 03/2023]; ADVANCED DRIVER ASSISTANCE SYSTEM: FRONT CAMERA SYSTEM: TERMINALS OF ECU 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [03/2023 -        ]; ADVANCED DRIVER ASSISTANCE SYSTEM: FRONT CAMERA SYSTEM: TERMINALS OF ECU

(a) Disconnect the cable from the negative (-) auxiliary battery terminal.

(b) Disconnect the T21 forward recognition camera connector.

(c) Measure the resistance according to the value(s) in the table below.

*1

DLC3

-

-

*a

Front view of wire harness connector

(to Forward Recognition Camera)

-

-

Standard Resistance:

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition

T21-2 (CA2P) - T21-1 (CA2L)

HIGH-level CAN bus line - LOW-level CAN bus line

Cable disconnected from negative (-) auxiliary battery terminal

108 to 132 Ω

T21-2 (CA2P) - T21-13 (GND)

HIGH-level CAN bus line - Ground

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

T21-1 (CA2L) - T21-13 (GND)

LOW-level CAN bus line - Ground

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

T21-2 (CA2P) - I26-16 (BAT)

HIGH-level CAN bus line - Auxiliary battery positive (+)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

T21-1 (CA2L) - I26-16 (BAT)

LOW-level CAN bus line - Auxiliary battery positive (+)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

T21-10 (CA1P) - T21-9 (CA1N)

HIGH-level CAN bus line - LOW-level CAN bus line

Cable disconnected from negative (-) auxiliary battery terminal

108 to 132 Ω

T21-10 (CA1P) - T21-13 (GND)

HIGH-level CAN bus line - Ground

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

T21-9 (CA1N) - T21-13 (GND)

LOW-level CAN bus line - Ground

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

T21-10 (CA1P) - I26-16 (BAT)

HIGH-level CAN bus line - Auxiliary battery positive (+)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

T21-9 (CA1N) - I26-16 (BAT)

LOW-level CAN bus line - Auxiliary battery positive (+)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

MILLIMETER WAVE RADAR SENSOR ASSEMBLY (w/ Front Camera System)

Refer to Terminals of ECU.

Click here 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 -        ]; ADVANCED DRIVER ASSISTANCE SYSTEM: FRONT RADAR SENSOR SYSTEM: TERMINALS OF ECU

(a) Disconnect the cable from the negative (-) auxiliary battery terminal.

(b) Disconnect the A128 millimeter wave radar sensor assembly connector.

(c) Measure the resistance according to the value(s) in the table below.

*1

DLC3

-

-

*a

Front view of wire harness connector

(to Millimeter Wave Radar Sensor Assembly)

-

-

Standard Resistance:

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition

A128-4 (CA2H) - A128-3 (CA2L)

HIGH-level CAN bus line - LOW-level CAN bus line

Cable disconnected from negative (-) auxiliary battery terminal

108 to 132 Ω

A128-4 (CA2H) - A128-5 (SGND)

HIGH-level CAN bus line - Ground

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

A128-3 (CA2L) - A128-5 (SGND)

LOW-level CAN bus line - Ground

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

A128-4 (CA2H) - I26-16 (BAT)

HIGH-level CAN bus line - Auxiliary battery positive (+)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

A128-3 (CA2L) - I26-16 (BAT)

LOW-level CAN bus line - Auxiliary battery positive (+)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

A128-10 (CA3H) - A128-9 (CA3L)

HIGH-level CAN bus line - LOW-level CAN bus line

Cable disconnected from negative (-) auxiliary battery terminal

108 to 132 Ω

A128-10 (CA3H) - A128-5 (SGND)

HIGH-level CAN bus line - Ground

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

A128-9 (CA3L) - A128-5 (SGND)

LOW-level CAN bus line - Ground

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

A128-10 (CA3H) - I26-16 (BAT)

HIGH-level CAN bus line - Auxiliary battery positive (+)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

A128-9 (CA3L) - I26-16 (BAT)

LOW-level CAN bus line - Auxiliary battery positive (+)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

DCM (TELEMATICS TRANSCEIVER) (w/ Telematics Transceiver)

Refer to Terminals of ECU.

Click here 2023 - 2025 MY Corolla Corolla HV [09/2022 -        ]; TELEMATICS: TELEMATICS SYSTEM (for HV Model): TERMINALS OF ECU

(a) Disconnect the cable from the negative (-) auxiliary battery terminal.

(b) Disconnect the I143 DCM (telematics transceiver) connector.

(c) Measure the resistance according to the value(s) in the table below.

*a

Front view of wire harness connector

(to DCM (Telematics Transceiver))

Standard Resistance:

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition

I143-25 (CANP) - I143-26 (CANN)

HIGH-level CAN bus line - LOW-level CAN bus line

Cable disconnected from negative (-) auxiliary battery terminal

54 to 69 Ω

I143-25 (CANP) - I143-20 (E)

HIGH-level CAN bus line - Ground

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

I143-26 (CANN) - I143-20 (E)

LOW-level CAN bus line - Ground

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

I143-25 (CANP) - I143-1 (+B)

HIGH-level CAN bus line - Auxiliary battery positive (+)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

I143-26 (CANN) - I143-1 (+B)

LOW-level CAN bus line - Auxiliary battery positive (+)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

VEHICLE APPROACHING SPEAKER CONTROLLER (w/ Acoustic Vehicle Alerting System)

Refer to Terminals of ECU.

Click here 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 -        ]; ACOUSTIC VEHICLE ALERTING SYSTEM: ACOUSTIC VEHICLE ALERTING SYSTEM: TERMINALS OF ECU

(a) Disconnect the cable from the negative (-) auxiliary battery terminal.

(b) Disconnect the I158 vehicle approaching speaker controller connector.

(c) Measure the resistance according to the value(s) in the table below.

*a

Front view of wire harness connector

(to Vehicle Approaching Speaker Controller)

Standard Resistance:

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition

I158-1 (CANH) - I158-2 (CANL)

HIGH-level CAN bus line - LOW-level CAN bus line

Cable disconnected from negative (-) auxiliary battery terminal

54 to 69 Ω

I158-1 (CANH) - I158-12 (GND)

HIGH-level CAN bus line - Ground

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

I158-2 (CANL) - I158-12 (GND)

LOW-level CAN bus line - Ground

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

I158-1 (CANH) - I158-7 (+B)

HIGH-level CAN bus line - Auxiliary battery positive (+)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

I158-2 (CANL) - I158-7 (+B)

LOW-level CAN bus line - Auxiliary battery positive (+)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

OPTION CONNECTOR (BUS BUFFER ECU)

(a) Disconnect the cable from the negative (-) auxiliary battery terminal.

(b) Disconnect the I174 option connector (bus buffer ECU) connector.

HINT:

Disconnect any CAN compatible optional devices from the option connector.

(c) Measure the resistance according to the value(s) in the table below.

*1

DLC3

-

-

*a

Front view of wire harness connector

(to Option Connector (Bus Buffer ECU))

-

-

Standard Resistance:

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition

I174-2 (CAN+) - I174-1 (CAN-)

HIGH-level CAN bus line - LOW-level CAN bus line

Cable disconnected from negative (-) auxiliary battery terminal

108 to 132 Ω

I174-2 (CAN+) - I26-4 (CG)

HIGH-level CAN bus line - Ground

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

I174-1 (CAN-) - I26-4 (CG)

LOW-level CAN bus line - Ground

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

I174-2 (CAN+) - I26-16 (BAT)

HIGH-level CAN bus line - Auxiliary battery positive (+)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

I174-1 (CAN-) - I26-16 (BAT)

LOW-level CAN bus line - Auxiliary battery positive (+)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

RADIO AND DISPLAY RECEIVER ASSEMBLY (for Single Knob Type)

Refer to Terminals of ECU.

Click here 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 -        ]; AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM (for Single Knob Type): TERMINALS OF ECU

(a) Disconnect the cable from the negative (-) auxiliary battery terminal.

(b) Disconnect the I175 radio and display receiver assembly connector.

(c) Measure the resistance according to the value(s) in the table below.

*1

DLC3

-

-

*a

Front view of wire harness connector

(to Radio and Display Receiver Assembly)

-

-

Standard Resistance:

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition

I175-13 (CANH) - I175-14 (CANL)

HIGH-level CAN bus line - LOW-level CAN bus line

Cable disconnected from negative (-) auxiliary battery terminal

54 to 69 Ω

I175-13 (CANH) - I26-4 (CG)

HIGH-level CAN bus line - Ground

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

I175-14 (CANL) - I26-4 (CG)

LOW-level CAN bus line - Ground

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

I175-13 (CANH) - I26-16 (BAT)

HIGH-level CAN bus line - Auxiliary battery positive (+)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

I175-14 (CANL) - I26-16 (BAT)

LOW-level CAN bus line - Auxiliary battery positive (+)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

RADIO AND DISPLAY RECEIVER ASSEMBLY (for Knobless Type)

Refer to Terminals of ECU.

Click here 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 -        ]; AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM (for Knobless Radio and Display Receiver): TERMINALS OF ECU

(a) Disconnect the cable from the negative (-) auxiliary battery terminal.

(b) Disconnect the I184 and I185 radio and display receiver assembly connectors.

(c) Measure the resistance according to the value(s) in the table below.

*a

Front view of wire harness connector

(to Radio and Display Receiver Assembly)

-

-

Standard Resistance:

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition

I185-9 (CANH) - I185-10 (CANL)

HIGH-level CAN bus line - LOW-level CAN bus line

Cable disconnected from negative (-) auxiliary battery terminal

54 to 69 Ω

I185-9 (CANH) - I184-7 (GND1)

HIGH-level CAN bus line - Ground

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

I185-10 (CANL) - I184-7 (GND1)

LOW-level CAN bus line - Ground

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

I185-9 (CANH) - I184-4 (+B1)

HIGH-level CAN bus line - Auxiliary battery positive (+)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

I185-10 (CANL) - I184-4 (+B1)

LOW-level CAN bus line - Auxiliary battery positive (+)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

BATTERY ECU ASSEMBLY

Refer to Terminals of ECU.

Click here 2023 - 2025 MY Corolla HV [09/2022 -        ]; HYBRID / BATTERY CONTROL: HYBRID BATTERY SYSTEM (for LITHIUM-ION BATTERY with PA10): TERMINALS OF ECU

(a) Disconnect the cable from the negative (-) auxiliary battery terminal.

(b) Disconnect the O192 battery ECU assembly connector.

(c) Measure the resistance according to the value(s) in the table below.

*a

Front view of wire harness connector

(to Battery ECU Assembly)

Standard Resistance:

Bus 2 Main Lines

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition

O192-9 (CA2H) - O192-8 (CA2L)

HIGH-level CAN bus line - LOW-level CAN bus line

Cable disconnected from negative (-) auxiliary battery terminal

108 to 132 Ω

O192-9 (CA2H) - O192-10 (GND)

HIGH-level CAN bus line - Ground

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

O192-8 (CA2L) - O192-10 (GND)

LOW-level CAN bus line - Ground

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

O192-9 (CA2H) - O192-24 (AM)

HIGH-level CAN bus line - Auxiliary battery positive (+)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

O192-8 (CA2L) - O192-24 (AM)

LOW-level CAN bus line - Auxiliary battery positive (+)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

O192-20 (C2HB) - O192-19 (C2LB)

HIGH-level CAN bus line - LOW-level CAN bus line

Cable disconnected from negative (-) auxiliary battery terminal

108 to 132 Ω

O192-20 (C2HB) - O192-10 (GND)

HIGH-level CAN bus line - Ground

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

O192-19 (C2LB) - O192-10 (GND)

LOW-level CAN bus line - Ground

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

O192-20 (C2HB) - O192-24 (AM)

HIGH-level CAN bus line - Auxiliary battery positive (+)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

O192-19 (C2LB) - O192-24 (AM)

LOW-level CAN bus line - Auxiliary battery positive (+)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

Battery Local Bus Main Lines

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition

O192-22 (CA1H) - O192-21 (CA1L)

HIGH-level CAN bus line - LOW-level CAN bus line

Cable disconnected from negative (-) auxiliary battery terminal

108 to 132 Ω

O192-22 (CA1H) - O192-10 (GND)

HIGH-level CAN bus line - Ground

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

O192-21 (CA1L) - O192-10 (GND)

LOW-level CAN bus line - Ground

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

O192-22 (CA1H) - O192-24 (AM)

HIGH-level CAN bus line - Auxiliary battery positive (+)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

O192-21 (CA1L) - O192-24 (AM)

LOW-level CAN bus line - Auxiliary battery positive (+)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

TIRE PRESSURE WARNING ECU AND RECEIVER (w/ Tire Pressure Warning System (w/ Smart Key System))

Refer to Terminals of ECU.

Click here 2023 - 2025 MY Corolla Corolla HV [09/2022 -        ]; TIRE PRESSURE MONITORING: TIRE PRESSURE WARNING SYSTEM (for HV Model): TERMINALS OF ECU

(a) Disconnect the cable from the negative (-) auxiliary battery terminal.

(b) Disconnect the O170 tire pressure warning ECU and receiver connector.

(c) Measure the resistance according to the value(s) in the table below.

*a

Front view of wire harness connector

(to Tire Pressure Warning ECU and Receiver)

Standard Resistance:

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition

O170-9 (CANH) - O170-10 (CANL)

HIGH-level CAN bus line - LOW-level CAN bus line

Cable disconnected from negative (-) auxiliary battery terminal

54 to 69 Ω

O170-9 (CANH) - O170-12 (GND)

HIGH-level CAN bus line - Ground

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

O170-10 (CANL) - O170-12 (GND)

LOW-level CAN bus line - Ground

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

O170-9 (CANH) - O170-7 (+B)

HIGH-level CAN bus line - Auxiliary battery positive (+)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

O170-10 (CANL) - O170-7 (+B)

LOW-level CAN bus line - Auxiliary battery positive (+)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

TIRE PRESSURE WARNING ECU AND RECEIVER (w/ Tire Pressure Warning System (w/o Smart Key System))

Refer to Terminals of ECU.

Click here 2023 - 2025 MY Corolla Corolla HV [09/2022 -        ]; TIRE PRESSURE MONITORING: TIRE PRESSURE WARNING SYSTEM (for HV Model): TERMINALS OF ECU

(a) Disconnect the cable from the negative (-) auxiliary battery terminal.

(b) Disconnect the O171 tire pressure warning ECU and receiver connector.

(c) Measure the resistance according to the value(s) in the table below.

*a

Front view of wire harness connector

(to Tire Pressure Warning ECU and Receiver)

Standard Resistance:

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition

O171-9 (CANH) - O171-10 (CANL)

HIGH-level CAN bus line - LOW-level CAN bus line

Cable disconnected from negative (-) auxiliary battery terminal

54 to 69 Ω

O171-9 (CANH) - O171-12 (GND)

HIGH-level CAN bus line - Ground

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

O171-10 (CANL) - O171-12 (GND)

LOW-level CAN bus line - Ground

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

O171-9 (CANH) - O171-7 (+B)

HIGH-level CAN bus line - Auxiliary battery positive (+)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

O171-10 (CANL) - O171-7 (+B)

LOW-level CAN bus line - Auxiliary battery positive (+)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher