Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM1000000028K8Y
Model Year Start: 2023 Model: GR Corolla Prod Date Range: [11/2022 -           ]
Title: THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Entry Function): Driver Side Door Entry Unlock Function does not Operate; 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 -        ]

Driver Side Door Entry Unlock Function does not Operate

DESCRIPTION

If the entry unlock function does not operate for the driver door only, but the entry lock function operates, the request code is being transmitted properly from the driver door. In this case, there may be a problem related to the unlock sensor (connection between the certification ECU (smart key ECU assembly) and front door outside handle assembly (for driver door)).

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

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

  • Before replacing the certification ECU (smart key ECU assembly), refer to Precaution.

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

  • Check that there are no electrical key transmitter sub-assemblies in the vehicle.
  • After repair, confirm that no DTCs are output.

PROCEDURE

1.

CHECK POWER DOOR LOCK CONTROL SYSTEM

(a) When the door control switch on the multiplex network master switch assembly is operated, check that the doors unlock and lock according to the switch operation.

Click here 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 -        ]; DOOR LOCK: POWER DOOR LOCK CONTROL SYSTEM: OPERATION CHECK

OK:

Door locks operate normally.

NG

GO TO POWER DOOR LOCK CONTROL SYSTEM

OK

2.

CHECK ENTRY OPERATION

(a) Check the entry unlock function.

(1) Turn the ignition switch off.

*a

Unlock Sensor (Backside)

(2) Open and close the driver door.

(3) With the electrical key transmitter sub-assembly outside of the vehicle, press the lock switch of the electrical key transmitter sub-assembly to lock all of the doors.

(4) Hold the electrical key transmitter sub-assembly at the same height as the door outside handle assembly and approximately 0.3 m (0.984 ft.) from the driver door.

(5) Check that the LED of the electrical key transmitter sub-assembly blinks.

(6) Touch the unlock sensor on the backside of the front door outside handle assembly (for driver door) for 2 seconds or more.*

  • *: Perform this step 3 seconds or more after performing step (3).

HINT:

When checking the operation of the unlock sensor again, make sure to perform the procedure from step (1).

Result

Proceed to

Entry function does not operate normally

A

Entry function operates normally

B
B

GO TO CHECK FOR INTERMITTENT PROBLEMS (VEHICLE CONTROL HISTORY (ROB))

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

for Gasoline Model: Click here 2023 - 2025 MY Corolla Corolla Hatchback GR Corolla [11/2022 -        ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, Gasoline Model): CHECK FOR INTERMITTENT PROBLEMS

A

3.

READ VALUE USING GTS (FL DOOR LOCK POSITION SWITCH STATUS)

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

Body Electrical > Main Body > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

FL Door Lock Position Switch Status

Front door LH unlock detection switch signal

Lock or Unlock

Lock: Front door LH locked

Unlock: Front door LH unlocked

-

Body Electrical > Main Body > Data List

Tester Display

FL Door Lock Position Switch Status

OK:

The GTS display changes correctly in response to the lock/unlock operation of the driver door.

NG

GO TO LIGHTING SYSTEM (Proceed to Door Unlock Detection Switch Circuit)

OK

4.

READ VALUE USING GTS (DRIVER SIDE UNLOCK SENSOR)

(a) Open and close the driver door.

*a

Unlock Sensor (Backside)

(b) With the electrical key transmitter sub-assembly outside of the vehicle, press the lock switch of the electrical key transmitter sub-assembly to lock all of the doors.

(c) Hold the electrical key transmitter sub-assembly at the same height as the door outside handle assembly and approximately 0.3 m (0.984 ft.) from the driver door.

(d) Check that the LED of the electrical key transmitter sub-assembly blinks.

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

(f) Touch the unlock sensor on the backside of the front door outside handle assembly (for driver door) for 2 seconds or more.*

  • *: Perform this step 3 seconds or more after performing step (b).

HINT:

When checking the operation of the unlock sensor again, make sure to perform the procedure from step (a).

Body Electrical > Smart Key > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Driver Side Unlock Sensor

Driver door touch sensor (unlock sensor)

OFF or ON

OFF: Driver door touch sensor (unlock sensor) not touched

ON: Driver door touch sensor (unlock sensor) touched
  • Displays whether the unlock sensor is on or off (even if the sensor is touched and contact is maintained, "ON" is displayed only momentarily).
  • Use this Data List item to help determine if there is an unlock sensor malfunction when the entry unlock function does not operate.

Body Electrical > Smart Key > Data List

Tester Display

Driver Side Unlock Sensor

OK:

The GTS display changes correctly in response to the operation of the front door outside handle assembly (for driver door).

OK

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

NG

5.

CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - FRONT DOOR OUTSIDE HANDLE ASSEMBLY (FOR DRIVER DOOR))

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

(b) Disconnect the L16 front door outside handle assembly (for driver door) connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

I167-16 (CLG1) - L16-4 (ANT1)

Always

Below 1 Ω

I167-15 (CG1B) - L16-6 (ANT2)

Always

Below 1 Ω

I167-16 (CLG1) or L16-4 (ANT1) - Other terminals and body ground

Always

10 kΩ or higher

I167-15 (CG1B) or L16-6 (ANT2) - Other terminals and body ground

Always

10 kΩ or higher

(d) Reconnect the L16 front door outside handle assembly (for driver door) connector.

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

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

6.

READ VALUE USING GTS (DRIVER SIDE UNLOCK SENSOR)

(a) Open and close the driver door.

*a

Unlock Sensor (Backside)

(b) With the electrical key transmitter sub-assembly outside of the vehicle, press the lock switch of the electrical key transmitter sub-assembly to lock all of the doors.

(c) Hold the electrical key transmitter sub-assembly at the same height as the door outside handle assembly and approximately 0.3 m (0.984 ft.) from the driver door.

(d) Check that the LED of the electrical key transmitter sub-assembly blinks.

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

(f) Touch the unlock sensor on the backside of the front door outside handle assembly (for driver door) for 2 seconds or more.*

  • *: Perform this step 3 seconds or more after performing step (b).

HINT:

When checking the operation of the unlock sensor again, make sure to perform the procedure from step (a).

Body Electrical > Smart Key > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Driver Side Unlock Sensor

Driver door touch sensor (unlock sensor)

OFF or ON

OFF: Driver door touch sensor (unlock sensor) not touched

ON: Driver door touch sensor (unlock sensor) touched
  • Displays whether the unlock sensor is on or off (even if the sensor is touched and contact is maintained, "ON" is displayed only momentarily).
  • Use this Data List item to help determine if there is an unlock sensor malfunction when the entry unlock function does not operate.

Body Electrical > Smart Key > Data List

Tester Display

Driver Side Unlock Sensor

OK:

The GTS display changes correctly in response to the operation of the front door outside handle assembly (for driver door).

OK

END (CONNECTOR WAS NOT CONNECTED SECURELY)
NG

REPLACE FRONT DOOR OUTSIDE HANDLE ASSEMBLY (FOR DRIVER DOOR)