Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM1000000026D68
Model Year Start: 2023 Model: GR Corolla Prod Date Range: [09/2022 - 11/2022]
Title: NETWORKING: LIN COMMUNICATION SYSTEM (for TMC Made): TERMINALS OF ECU; 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - 11/2022]

TERMINALS OF ECU

CHECK POWER DISTRIBUTION BOX ASSEMBLY AND MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

(a) Disconnect the MB main body ECU (multiplex network body ECU) connector.

Click here 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - 11/2022]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL

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

HINT:

Measure the values on the wire harness side with the connectors connected.

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition

MB-13 (GND1) - Body ground

Ground

Always

Below 1 Ω

MB-14 (GND2) - Body ground

Ground

Always

Below 1 Ω

MB-26 (BECU) - Body ground

Auxiliary battery power supply

Always*1

Ignition switch off*2

11 to 14 V

MB-27 (IGR) - Body ground

IG power supply

Ignition switch ON

11 to 14 V

Ignition switch off

Below 1 V

  • *1: for Gasoline Model
  • *2: for HV Model

(c) Reconnect the MB main body ECU (multiplex network body ECU) connector.

(d) Check for pulses according to the value(s) in the table below.

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition

8A-15 - Body ground*

LIN communication line

Ignition switch ON

Pulse generation

8H-11 - Body ground

LIN communication line

Ignition switch ON

Pulse generation

  • *: w/ Sliding Roof System

CHECK MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY

(a) Disconnect the L7 multiplex network master switch assembly connector.

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

HINT:

Measure the values on the wire harness side with the connector disconnected.

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition

L7-11 (B) - Body ground

Auxiliary battery power supply

Always*1

Ignition switch off*2

11 to 14 V

L7-12 (GND) - Body ground

Ground

Always

Below 1 Ω

  • *1: for Gasoline Model
  • *2: for HV Model

(c) Reconnect the L7 multiplex network master switch assembly connector.

(d) Check for pulses according to the value(s) in the table below.

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition

L7-17 (LIN1) - Body ground

LIN communication line

Ignition switch ON

Pulse generation

L7-16 (LIN2) - Body ground

LIN communication line

Ignition switch ON

Pulse generation

CHECK POWER WINDOW REGULATOR MOTOR ASSEMBLY (DRIVER DOOR)

(a) Disconnect the L2 power window regulator motor assembly (driver door) connector.

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

HINT:

Measure the values on the wire harness side with the connector disconnected.

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition

L2-2 (B) - Body ground

Auxiliary battery power supply

Always*1

Ignition switch off*2

11 to 14 V

L2-1 (GND) - Body ground

Ground

Always

Below 1 Ω

  • *1: for Gasoline Model
  • *2: for HV Model

(c) Reconnect the L2 power window regulator motor assembly (driver door) connector.

(d) Check for pulses according to the value(s) in the table below.

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition

L2-9 (LIN) - Body ground

LIN communication line

Ignition switch ON

Pulse generation

CHECK POWER WINDOW REGULATOR MOTOR ASSEMBLY (FRONT PASSENGER DOOR)

(a) Disconnect the K2 power window regulator motor assembly (front passenger door) connector.

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

HINT:

Measure the values on the wire harness side with the connector disconnected.

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition

K2-2 (B) - Body ground

Auxiliary battery power supply

Always*1

Ignition switch off*2

11 to 14 V

K2-1 (GND) - Body ground

Ground

Always

Below 1 Ω

  • *1: for Gasoline Model
  • *2: for HV Model

(c) Reconnect the K2 power window regulator motor assembly (front passenger door) connector.

(d) Check for pulses according to the value(s) in the table below.

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition

K2-9 (LIN) - Body ground

LIN communication line

Ignition switch ON

Pulse generation

CHECK POWER WINDOW REGULATOR MOTOR ASSEMBLY (REAR RH DOOR)

(a) Disconnect the M2 power window regulator motor assembly (rear RH door) connector.

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

HINT:

Measure the values on the wire harness side with the connector disconnected.

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition

M2-2 (B) - Body ground

Auxiliary battery power supply

Always*1

Ignition switch off*2

11 to 14 V

M2-1 (GND) - Body ground

Ground

Always

Below 1 Ω

  • *1: for Gasoline Model
  • *2: for HV Model

(c) Reconnect the M2 power window regulator motor assembly (rear RH door) connector.

(d) Check for pulses according to the value(s) in the table below.

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition

M2-9 (LIN) - Body ground

LIN communication line

Ignition switch ON

Pulse generation

CHECK POWER WINDOW REGULATOR MOTOR ASSEMBLY (REAR LH DOOR)

(a) Disconnect the N2 power window regulator motor assembly (rear LH door) connector.

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

HINT:

Measure the values on the wire harness side with the connector disconnected.

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition

N2-2 (B) - Body ground

Auxiliary battery power supply

Always*1

Ignition switch off*2

11 to 14 V

N2-1 (GND) - Body ground

Ground

Always

Below 1 Ω

  • *1: for Gasoline Model
  • *2: for HV Model

(c) Reconnect the N2 power window regulator motor assembly (rear LH door) connector.

(d) Check for pulses according to the value(s) in the table below.

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition

N2-9 (LIN) - Body ground

LIN communication line

Ignition switch ON

Pulse generation

CHECK SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY) (w/ Sliding Roof System)

(a) Disconnect the T29 sliding roof ECU (sliding roof drive gear sub-assembly) connector.

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

HINT:

Measure the values on the wire harness side with the connector disconnected.

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition

T29-1 (B) - Body ground

Auxiliary battery power supply

Always*1

Ignition switch off*2

11 to 14 V

T29-2 (E) - Body ground

Ground

Always

Below 1 Ω

  • *1: for Gasoline Model
  • *2: for HV Model

(c) Reconnect the T29 sliding roof ECU (sliding roof drive gear sub-assembly) connector.

(d) Check for pulses according to the value(s) in the table below.

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition

T29-7 (MPX1) - Body ground

LIN communication line

Ignition switch ON

Pulse generation

CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) (w/ Smart Key System)

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

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

HINT:

Measure the values on the wire harness side with the connector disconnected.

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition

I167-6 (+B) - Body ground

Auxiliary battery power supply

Always*1

Ignition switch off*2

11 to 14 V

I167-29 (E) - Body ground

Ground

Always

Below 1 Ω

  • *1: for Gasoline Model
  • *2: for HV Model

(c) Reconnect the I167 certification ECU (smart key ECU assembly) connector.

(d) Check for pulses according to the value(s) in the table below.

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition

I167-8 (LIN) - Body ground

LIN communication line

Ignition switch ON

Pulse generation

CHECK STEERING LOCK ECU (STEERING LOCK ACTUATOR WITH ECU ASSEMBLY) (w/ Steering Lock)

(a) Disconnect the I59 steering lock ECU (steering lock actuator with ECU assembly) connector.

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

HINT:

Measure the values on the wire harness side with the connectors disconnected.

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition

I59-7 (B) - Body ground

Auxiliary battery power supply

Always*1

Ignition switch off*2

11 to 14 V

I59-1 (GND) - Body ground

Ground

Always

Below 1 Ω

  • *1: for Gasoline Model
  • *2: for HV Model

(c) Reconnect the I59 steering lock ECU (steering lock actuator with ECU assembly) connector.

(d) Check for pulses according to the value(s) in the table below.

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition

I59-5 (LIN) - Body ground

LIN communication line

Ignition switch ON

Pulse generation

CHECK ID CODE BOX (IMMOBILISER CODE ECU) (w/ Smart Key System)

(a) Disconnect the I20 ID code box (immobiliser code ECU) connector.

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

HINT:

Measure the values on the wire harness side with the connector disconnected.

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition

I20-5 (GND) - Body ground

Ground

Always

Below 1 Ω

I20-1 (+B) - Body ground

+B power supply

Always*1

Ignition switch off*2

11 to 14 V

  • *1: for Gasoline Model
  • *2: for HV Model

(c) Reconnect the I20 ID code box (immobiliser code ECU) connector.

(d) Check for pulses according to the value(s) in the table below.

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition

I20-2 (LIN1) - Body ground

LIN communication line

Ignition switch ON

Pulse generation