Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM1000000026XCS
Model Year Start: 2023 Model: Corolla Prod Date Range: [09/2022 -           ]
Title: THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, HV Model): Power Source Mode does not Change to ON (READY); 2023 - 2025 MY Corolla Corolla HV [09/2022 -        ]

Power Source Mode does not Change to ON (READY)

DESCRIPTION

When the electrical key transmitter sub-assembly is in the cabin and the power switch is pressed, the certification ECU (smart key ECU assembly) receives a signal and changes the power source mode. Additionally, when the shift position is in P and the brake pedal is depressed, the hybrid control system can be started by pressing the power switch. If the steering is unlocked, the hybrid control system can also be started by pressing the power switch with the shift position in P and the brake pedal depressed.

Related Data List and Active Test Items

Problem Symptom

Data List and Active Test

Power source mode does not change to ON (READY)

Power Source Control

  • Stop Light Switch
  • Shift P Signal
  • Power Supply Condition

Smart Key

  • Immobiliser
  • Start Request
  • S Code Check
  • L Code Check

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • When using the GTS with the ignition switch off, connect the GTS to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the GTS and the vehicle begins.

    Then select Model Code "KEY REGIST" under manual mode and enter the following menus: Body Electrical / Start Key(CAN). While using the GTS, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the GTS and the vehicle.

  • The smart key system (for Start Function) uses the LIN communication system and CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Troubleshoot the smart key system (for Start Function) after confirming that the communication systems are functioning properly.

    Click here 2023 MY Corolla Corolla HV [09/2022 - 11/2022]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, HV Model): HOW TO PROCEED WITH TROUBLESHOOTING 2023 - 2025 MY Corolla Corolla HV [11/2022 -        ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, HV Model): HOW TO PROCEED WITH TROUBLESHOOTING

  • If the smart key system (for Start Function) has been canceled, enable the system before performing troubleshooting.

    Click here 2023 MY Corolla Corolla HV [09/2022 - 11/2022]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, HV Model): CUSTOMIZE PARAMETERS 2023 - 2025 MY Corolla Corolla HV [11/2022 -        ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, HV Model): CUSTOMIZE PARAMETERS

  • Inspect the fuses for circuits related to this system before performing the following procedure.
  • Before replacing the certification ECU (smart key ECU assembly) or electrical key transmitter sub-assembly, refer to Registration.

    Click here 2023 - 2025 MY Corolla Corolla HV [09/2022 -        ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, HV Model): REGISTRATION

  • After completing repairs, confirm that the problem does not recur.
  • After repair, confirm that no DTCs are output by performing "DTC Output Confirmation Operation".

PROCEDURE

1.

CHECK POWER SWITCH CONDITION

(a) Get into the vehicle while carrying an electrical key transmitter sub-assembly.

(b) Move the shift position to P.

(c) With the brake pedal released, check that pressing the power switch causes the power source mode to change.

Result

Proceed to

Power source mode changes : Off → ACC → ON → off

A

Power source mode does not change to ACC or ON

B

Power source mode changes to ON but not to ACC

C

Power source mode changes to ACC but not to ON

D
B

GO TO OTHER PROBLEM (Power Source Mode does not Change to ON (IG and ACC)) 2023 MY Corolla Corolla HV [09/2022 - 11/2022]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, HV Model): Power Source Mode does not Change to ON (IG and ACC) 2023 - 2025 MY Corolla Corolla HV [11/2022 -        ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, HV Model): Power Source Mode does not Change to ON (IG and ACC)

C

GO TO OTHER PROBLEM (Power Source Mode does not Change to ON (ACC))

D

GO TO OTHER PROBLEM (Power Source Mode does not Change to ON (IG))

A

2.

READ VALUE USING GTS (STOP LIGHT SWITCH)

(a) Read the Data List according to the display on the GTS.

Body Electrical > Power Source Control > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Stop Light Switch

State of brake pedal

OFF or ON

OFF: Brake pedal released

ON: Brake pedal depressed
  • Use this item to determine if the stop light switch assembly is malfunctioning.
  • The hybrid control system cannot be started when this item is OFF.
  • If the stop light switch assembly is malfunctioning, the hybrid control system can be started by pressing and holding the power switch for a certain period of time.

Body Electrical > Power Source Control > Data List

Tester Display

Stop Light Switch

OK:

The GTS display changes correctly in response to the brake pedal operation.

NG

GO TO STEP 10

OK

3.

READ VALUE USING GTS (SHIFT P SIGNAL)

(a) Read the Data List according to the display on the GTS.

Body Electrical > Power Source Control > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Shift P Signal

Shift position P

OFF or ON

OFF: Shift position not in P

ON: Shift position in P

Use this item to determine if the shift position switch is malfunctioning.

Body Electrical > Power Source Control > Data List

Tester Display

Shift P Signal

OK:

The GTS display changes correctly in response to the shift position.

NG

GO TO STEP 8

OK

4.

READ VALUE USING GTS (POWER SUPPLY CONDITION)

(a) Read the Data List according to the display on the GTS.

Body Electrical > Power Source Control > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Power Supply Condition

Power supply state

OFF, ACC ON, IGR ON, IGP ON or Starter ON

OFF: Ignition switch off

ACC ON: Ignition switch ACC

IGR ON: Ignition switch ON

IGP ON: Ignition switch ON

Starter ON: Sending hybrid control system start request signal

-

Body Electrical > Power Source Control > Data List

Tester Display

Power Supply Condition

NOTICE:

Check that the key indicator display is displayed on the multi-information display in the combination meter assembly, and then press the power switch.

OK:

The GTS display changes correctly in response to the power switch operation.

NG

GO TO STEP 7

OK

5.

CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - HYBRID VEHICLE CONTROL ECU)

(a) Disconnect the O175 certification ECU (smart key ECU assembly) connector.

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

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

O175-2 (ST2) - I3-11 (ST2)

Always

Below 1 Ω

O175-2 (ST2) or I3-11 (ST2) - Other terminals and body ground

Always

10 kΩ or higher
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

6.

CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

(a) Connect the O175 certification ECU (smart key ECU assembly) connector.

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

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

O175-2 (ST2) - Body ground

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

*a

Component with harness connected

(Certification ECU (Smart Key ECU Assembly))
OK

GO TO HYBRID CONTROL SYSTEM

NG

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - 11/2022]; THEFT DETERRENT / KEYLESS ENTRY: CERTIFICATION ECU: REMOVAL 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 -        ]; THEFT DETERRENT / KEYLESS ENTRY: CERTIFICATION ECU: REMOVAL

7.

CHECK SECURITY INDICATOR LIGHT (IMMOBILISER FUNCTION UNSET)

(a) Get into the vehicle while carrying an electrical key transmitter sub-assembly.

(b) Move the shift position to P.

(c) Press the power switch with the brake pedal released and check that the security indicator light changes from blinking to off at the same time that the power source mode changes to ACC.

OK:

The security indicator light changes from blinking to off at the same time that the power source mode changes to ACC.

HINT:

The immobiliser function can be determined to be operating correctly if the security indicator light changes from blinking to off at the same time that the power source mode changes to ACC.

OK

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - 11/2022]; THEFT DETERRENT / KEYLESS ENTRY: CERTIFICATION ECU: REMOVAL 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 -        ]; THEFT DETERRENT / KEYLESS ENTRY: CERTIFICATION ECU: REMOVAL

NG

GO TO OTHER PROBLEM (Immobiliser System does not Operate Properly)

8.

CHECK SHIFT LOCK CONTROL UNIT ASSEMBLY

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

I167-14 (P) - Body ground

Shift position in P → Shift position not in P

30 kΩ or higher → Below 200 Ω

*a

Component with harness connected

(Certification ECU (Smart Key ECU Assembly))
OK

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - 11/2022]; THEFT DETERRENT / KEYLESS ENTRY: CERTIFICATION ECU: REMOVAL 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 -        ]; THEFT DETERRENT / KEYLESS ENTRY: CERTIFICATION ECU: REMOVAL

NG

9.

CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - SHIFT LOCK CONTROL UNIT ASSEMBLY)

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

(b) Disconnect the I17 shift lock control unit assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

I167-14 (P) - I17-3 (P2)

Always

Below 1 Ω

I167-14 (P) or I17-3 (P2) - Other terminals and body ground

Always

10 kΩ or higher
OK

REPLACE SHIFT LOCK CONTROL UNIT ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

10.

CHECK HARNESS AND CONNECTOR (STOP LIGHT SWITCH ASSEMBLY - POWER SOURCE AND BODY GROUND)

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

A53-7 (B) - Body ground

Ignition switch off

11 to 14 V

*a

Component with harness connected

(Stop Light Switch Assembly)

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

A53-2 (GND) - Body ground

Always

Below 1 Ω
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

11.

CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - STOP LIGHT SWITCH ASSEMBLY)

(a) Disconnect the A53 stop light switch assembly connector.

(b) Disconnect the O175 certification ECU (smart key ECU assembly) connector.

(c) Disconnect the A161 hybrid vehicle control ECU connector.

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

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

(f) Disconnect the I17 shift lock control unit assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

O175-21 (STP1) - A53-3 (L)

Always

Below 1 Ω

O175-21 (STP1) or A53-3 (L) - Other terminals and body ground

Always

10 kΩ or higher
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

12.

CHECK STOP LIGHT SWITCH ASSEMBLY

Click here 2020 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 -        ]; LIGHTING (EXT): STOP LIGHT SWITCH: ON-VEHICLE INSPECTION

OK

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - 11/2022]; THEFT DETERRENT / KEYLESS ENTRY: CERTIFICATION ECU: REMOVAL 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 -        ]; THEFT DETERRENT / KEYLESS ENTRY: CERTIFICATION ECU: REMOVAL

NG

REPLACE STOP LIGHT SWITCH ASSEMBLY