Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM1000000028Z8Y
Model Year Start: 2023 Model: Corolla Prod Date Range: [11/2022 -           ]
Title: THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, HV Model): TERMINALS OF ECU; 2023 - 2025 MY Corolla Corolla HV [11/2022 -        ]

TERMINALS OF ECU

NOTICE:

  • When performing an inspection, make sure that "ACC Customize" is set to "ON" using the multi-display.

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

  • When "ACC Customize" is set to "ON" (ACC supply power enabled), the certification ECU (smart key ECU assembly) controls the ACC relay on and off. When "ACC Customize" is set to "OFF" (ACC supply power disabled), the certification ECU (smart key ECU assembly) and radio and display receiver assembly control the ACC relay on and off.

    Therefore, inspection conditions and results may differ depending on whether "ACC customize" is set to ON or OFF when inspecting ACC related terminals.

CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

(a) Disconnect the O175 and I167 certification ECU (smart key ECU assembly) connectors.

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

HINT:

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

Tester Connection

Terminal Description

Condition

Specified Condition

Related Data List Item/DTC

O175-21 (STP1) - Body ground

Stop light switch signal

Brake pedal depressed → Brake pedal released

9 V or higher → 1 V or less

Power Source Control

  • Stop Light Switch

I167-6 (+B) - I167-29 (E)

Power source

Ignition switch off

11 to 14 V

-

I167-14 (P) - I167-29 (E)

P position signal

Shift position in P → Shift position not in P

30 kΩ or higher → Below 200 Ω

Power Source Control

  • Shift P Signal

O175-22 (CUTB) - Body ground

Dark current cut pin*

Ignition switch off

11 to 14 V

-

I167-29 (E) - Body ground

GND

Always

Below 1 Ω

-

I167-11 (SLP) - I167-29 (E)

GND

Always

Below 1 Ω

-

I167-23 (SSW3) - Body ground

SSW3 contact signal

Power switch pushed → Power switch not pushed

Below 15 Ω → 10 kΩ or higher

Power Source Control

  • Push Start Switch 3

I167-27 (SSW2) - Body ground

SSW2 contact signal

Power switch pushed → Power switch not pushed

Below 15 Ω → 10 kΩ or higher

Power Source Control

  • Push Start Switch 2

I167-19 (SSW1) - Body ground

SSW1 contact signal

Power switch pushed → Power switch not pushed

Below 15 Ω → 10 kΩ or higher

Power Source Control

  • Push Start Switch 1
  • *: In order to prevent the vehicle auxiliary battery from being depleted when the vehicle is shipped long distances, a fuse that cuts unnecessary electrical load while the vehicle is being shipped is installed in the circuit. If the fuse is removed, the circuit becomes open. If the fuse that is between the vehicle auxiliary battery and terminal CUTB is removed and the circuit is open, the certification ECU (smart key ECU assembly) changes to a certain control mode (example: the transmission of radio waves every 0.25 seconds, which form the detection area, stops).

(c) Connect the O175 and I167 certification ECU (smart key ECU assembly) connectors.

(d) Measure the voltage and resistance, and check for pulses according to the value(s) in the table below.

Tester Connection

Terminal Description

Condition

Specified Condition

Related Data List Item/DTC

I167-8 (LIN) - I167-29 (E)

LIN communication line

Ignition switch ON

Pulse generation

-

I167-14 (P) - I167-29 (E)

P position signal

Shift position in P → Shift position not in P

9 V or higher → 2.76 V or less

Power Source Control

  • Shift P Signal

I167-23 (SSW3) - I167-29 (E)

SSW3 contact signal

Power switch not pushed → Power switch pushed

9 V or higher → 1 V or less

Power Source Control

  • Push Start Switch 3

I167-27 (SSW2) - I167-29 (E)

SSW2 contact signal

Power switch not pushed → Power switch pushed

9 V or higher → 1 V or less

Power Source Control

  • Push Start Switch 2

I167-19 (SSW1) - I167-29 (E)

SSW1 contact signal

Power switch not pushed → Power switch pushed

9 V or higher → 1 V or less

Power Source Control

  • Push Start Switch 1

I167-21 (ACCD) - I167-29 (E)

ACC signal

Ignition switch off → Ignition switch ACC

1 V or less → 8.5 V or higher

Power Source Control

  • ACC Relay Monitor

O175-11 (IGRD) - I167-29 (E)

IG signal

Ignition switch off → Ignition switch ON

1 V or less → 9 V or higher

Power Source Control

  • IGR Relay Circuit (Outside) Monitor

O175-24 (IGPD) - I167-29 (E)

IG signal

Ignition switch off → Ignition switch ON

1 V or less → 9 V or higher

Power Source Control

  • IGP Relay Circuit (Outside) Monitor

O175-13 (SPD) - I167-29 (E)

Vehicle speed signal

Vehicle being driven at approx. 5 km/h (3 mph)

Pulse generation

(See waveform 1)

Power Source Control

  • Vehicle Running Condition (Line)

O175-2 (ST2) - I167-29 (E)

STSW signal

With the brake pedal depressed, the power switch is pressed and held → After approx. 3 sec. has elapsed, the power switch is released

8.5 V or higher → 1 V or less

-

I167-4 (CLG5) - I167-29 (E)

Output to No. 1 indoor electrical key antenna assembly (front floor)

Procedure:

  1. Ignition switch off
  2. Electrical key transmitter sub-assembly not inside vehicle
  3. Within 30 seconds of closing any door

Pulse generation

(See waveform 2)

-

I167-5 (CG5B) - I167-29 (E)

Output to No. 1 indoor electrical key antenna assembly (front floor) (terminal on opposite side of component from CLG5 output terminal)

Procedure:

  1. Ignition switch off
  2. Electrical key transmitter sub-assembly not inside vehicle
  3. Within 30 seconds of closing any door

Pulse generation

(See waveform 2)

-

I167-30 (AGND) - Body ground

Transponder key amplifier ground

Always

Below 1 Ω

-

I167-12 (ANT1) - I167-30 (AGND)

Signal input / output from transponder key coil (transponder key coil built into power switch)

Ignition switch off, electrical key transmitter sub-assembly not in cabin, within 30 seconds of power switch pressed

Pulse generation

(See waveform 3)

Smart Key

  • Encrypt Code Difference

I167-13 (ANT2) - I167-30 (AGND)

Signal input / output from transponder key coil (transponder key coil built into power switch)

Ignition switch off, electrical key transmitter sub-assembly not in cabin, within 30 seconds of power switch pressed

Pulse generation

(See waveform 3)

I167-25 (IND) - I167-29 (E)

Security indicator output

Ignition switch off → ON

Pulse generation → Below 2 V

-

O174-20 (WCSW) - I167-29 (E)*

Wireless charger system stop signal

Procedure:

  1. Ignition switch off
  2. Electrical key transmitter sub-assembly inside vehicle
  3. Ignition switch off → ACC or ON

Below 1 V → 4.5 to 6 V

(For 1 second after ignition switch to ACC or ON)

-
  • *: w/ Wireless Charging System

(e) Using an oscilloscope, check the waveform of the ECU.

NOTICE:

The oscilloscope waveform shown in the illustration is an example for reference only. Noise, chattering, etc. are not shown.

(1) Waveform 1

Measurement Condition

Item

Content

Tester Connection

O175-13 (SPD) - I167-29 (E)

Tool Setting

5 V/DIV., 20 ms./DIV.

Condition

Vehicle being driven at approx. 5 km/h (3 mph)

HINT:

The wavelength becomes shorter as the vehicle speed increases.

(2) Waveform 2

*a

For 30 seconds after any door closed

*b

After 30 seconds or more have elapsed since any door closed

Measurement Condition

Item

Content

Tester Connection

I167-4 (CLG5) - I167-29 (E)

I167-5 (CG5B) - I167-29 (E)

Tool Setting

5 V/DIV., 500 ms/DIV.

Condition

Procedure:

  1. Ignition switch off
  2. Electrical key transmitter sub-assembly not inside vehicle
  3. Within 30 seconds of closing any door

(3) Waveform 3

Measurement Condition

Item

Content

Tester Connection

I167-12 (ANT1) - I167-30 (AGND)

I167-13 (ANT2) - I167-30 (AGND)

Tool Setting

5 V/DIV., 200 ms/DIV.

Condition

Ignition switch off, electrical key transmitter sub-assembly not in cabin, within 30 seconds of power switch pressed

CHECK ID CODE BOX (IMMOBILISER CODE ECU)

(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.

Tester Connection

Terminal Description

Condition

Specified Condition

Related Data List Item

I20-1 (+B) - Body ground

Power source

Ignition switch off

11 to 14 V

-

I20-5 (GND) - Body ground

Ground

Always

Below 1 Ω

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

(d) Measure the voltage and check for pulses according to the value(s) in the table below.

Tester Connection

Terminal Description

Condition

Specified Condition

Related Data List Item

I20-3 (EFII) - I20-5 (GND)

EFI communication input

(Signal input from hybrid vehicle control ECU to ID code box (immobiliser code ECU))

Ignition switch off

11 to 14 V

Smart Key

  • EFI Code Receive
  • Start Request

I20-3 (EFII) - I20-5 (GND)

EFI communication input

(Signal input from hybrid vehicle control ECU to ID code box (immobiliser code ECU))

Within 3 seconds of hybrid control system start or within 3 seconds of ignition switch turned to ON after cable disconnected and reconnected to auxiliary battery

Pulse generation

(See waveform 1)

I20-4 (EFIO) - I20-5 (GND)

EFI communication output

(Signal output from ID code box (immobiliser code ECU) to hybrid vehicle control ECU)

Ignition switch off

Below 1 V

I20-4 (EFIO) - I20-5 (GND)

EFI communication output

(Signal output from ID code box (immobiliser code ECU) to hybrid vehicle control ECU)

Within 3 seconds of hybrid control system start or within 3 seconds of ignition switch turned to ON after cable disconnected and reconnected to auxiliary battery

Pulse generation

(See waveform 2)

I20-2 (LIN1) - I20-5 (GND)

LIN communication line

Ignition switch ON

Pulse generation

-

(e) Using an oscilloscope, check the waveform.

NOTICE:

The waveform shown in the illustration is an example for reference only. Noise, chattering, etc. are not shown.

(1) Waveform 1

*a

Approximately 160 ms.

*b

Approximately 270 ms.

Item

Content

Tester Connection

I20-3 (EFII) - I20-5 (GND)

Tool Setting

2 V/DIV., 500 ms./DIV.

Condition

Within 3 seconds of hybrid control system start or within 3 seconds of ignition switch turned to ON after cable disconnected and reconnected to auxiliary battery

(2) Waveform 2

*a

Approximately 160 ms.

*b

Approximately 270 ms.

Item

Content

Tester Connection

I20-4 (EFIO) - I20-5 (GND)

Tool Setting

2 V/DIV., 500 ms./DIV.

Condition

Within 3 seconds of hybrid control system start or within 3 seconds of ignition switch turned to ON after cable disconnected and reconnected to auxiliary battery

CHECK HYBRID VEHICLE CONTROL ECU

(a) Measure the voltage and resistance, and check for pulses according to the value(s) in the table below.

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition

Related Data List Item/DTC

I3-8 (+B1) - I3-1 (E1)I2-35 (IG2) - I3-1 (E1)

Ignition power supply

Ignition switch ON

11 to 14 V

-

I3-1 (E1) - Body ground

Ground

Always

Below 1 Ω

-

I3-39 (IMO) - I3-1 (E1)

EFI communication output

(Signal output from hybrid vehicle control ECU to ID code box (immobiliser code ECU))

Ignition switch off

11 to 14 V
  • EFI Code Receive
  • Start Request

I3-39 (IMO) - I3-1 (E1)

EFI communication output

(Signal output from hybrid vehicle control ECU to ID code box (immobiliser code ECU))

Within 3 seconds of hybrid control system start or within 3 seconds of ignition switch turned to ON after cable disconnected and reconnected to auxiliary battery

Pulse generation

(See waveform 1)

I3-53 (IMI) - I3-1 (E1)

EFI communication input

(Signal input from ID code box (immobiliser code ECU) to hybrid vehicle control ECU)

Ignition switch off

11 to 14 V → 1 V or less

I3-53 (IMI) - I3-1 (E1)

EFI communication input

(Signal input from ID code box (immobiliser code ECU) to hybrid vehicle control ECU)

Within 3 seconds of hybrid control system start or within 3 seconds of ignition switch turned to ON after cable disconnected and reconnected to auxiliary battery

Pulse generation

(See waveform 2)

I3-11 (ST2) - I3-1 (E1)

Hybrid control system start request signal

With the brake pedal depressed, the power switch is pressed and held → After approx. 3 sec. has elapsed, the power switch is released

8.5 V or higher → 1.0 V or less

-

(b) Using an oscilloscope, check the waveform.

NOTICE:

The waveform shown in the illustration is an example for reference only. Noise, chattering, etc. are not shown.

(1) Waveform 1 (Reference)

*a

Approximately 160 ms.

*b

Approximately 270 ms.

Measurement Condition

Item

Content

Tester Connection

I3-39 (IMO) - I3-1 (E1)

Tool Setting

2 V/DIV., 500 ms./DIV.

Condition

Within 3 seconds of hybrid control system start or within 3 seconds of ignition switch turned to ON after cable disconnected and reconnected to auxiliary battery

(2) Waveform 2 (Reference)

*a

Approximately 160 ms.

*b

Approximately 270 ms.

Measurement Condition

Item

Content

Tester Connection

I3-53 (IMI) - I3-1 (E1)

Tool Setting

2 V/DIV., 500 ms./DIV.

Condition

Within 3 seconds of hybrid control system start or within 3 seconds of ignition switch turned to ON after cable disconnected and reconnected to auxiliary battery

CHECK POWER SWITCH

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

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition

Related Data List Item/DTC

I119-3 (GND) - Body ground

Transponder key amplifier ground

Always

Below 1 Ω

-

(b) Measure the voltage and check for pulses according to the value(s) in the table below.

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition

Related Data List Item/DTC

I119-1 (ANT1) - I119-3 (GND)

Signal input / output from transponder key coil (transponder key coil built into power switch)

Ignition switch off, electrical key transmitter sub-assembly not in cabin, within 30 seconds of power switch pressed

Pulse generation

(See waveform 1)

Smart Key

  • Encrypt Code Difference

    HINT:

    If immobiliser key code verification communication is not performed correctly, the malfunction may be indicated by one or more of the Data List items listed above

I119-7 (ANT2) - I119-3 (GND)

Signal input / output from transponder key coil (transponder key coil built into power switch)

Ignition switch off, electrical key transmitter sub-assembly not in cabin, within 30 seconds of power switch pressed

Pulse generation

(See waveform 2)

I119-11 (SS3) - I119-3 (GND)

SS3 contact signal

HINT:

Backup for SS1. Behaves the same way as SS1.

Power switch not pushed → Power switch pushed

9 V or higher → Below 1 V

Power Source Control

  • Push Start Switch 3

I119-6 (SS2) - I119-3 (GND)

SS2 contact signal

HINT:

Backup for SS1. Behaves the same way as SS1.

Power switch not pushed → Power switch pushed

9 V or higher → Below 1 V

Power Source Control

  • Push Start Switch 2

I119-12 (SS1) - I119-3 (GND)

SS1 contact signal

Power switch not pushed → Power switch pushed

9 V or higher → Below 1 V

Power Source Control

  • Push Start Switch 1

(c) Using an oscilloscope, check the waveform.

NOTICE:

The waveform shown in the illustration is an example for reference only. Noise, chattering, etc. are not shown.

(1) Waveform 1 (Reference)

Measurement Condition

Item

Content

Tester Connection

I119-1 (ANT1) - I119-3 (GND)

I119-7 (ANT2) - I119-3 (GND)

Tool Setting

5 V/DIV., 200 ms./DIV.

Condition

Ignition switch off, electrical key transmitter sub-assembly not in cabin, within 30 seconds of power switch pressed

SMART KEY SYSTEM (for Entry Function)

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