Toyota Corolla Cross: 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 LH).

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 the vehicle type under manual mode and enter the following menus: Body Electrical / Smart Key. 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.

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

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• 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.

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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 LH 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))

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 LH 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 LH.

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 LH)

(a) Disconnect the I222 certification ECU (smart key ECU assembly) connector.

(b) Disconnect the L19 front door outside handle assembly LH connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
I222-16 (CLG1) - L19-4 (ANT1)	Always	Below 1 Ω
I222-15 (CG1B) - L19-6 (ANT2)	Always	Below 1 Ω
I222-16 (CLG1) or L19-4 (ANT1) - Other terminals and body ground	Always	10 kΩ or higher
I222-15 (CG1B) or L19-6 (ANT2) - Other terminals and body ground	Always	10 kΩ or higher

(d) Reconnect the L19 front door outside handle assembly LH connector.

(e) Reconnect the I222 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 LH 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 LH.

OK

END (CONNECTOR WAS NOT CONNECTED SECURELY)

NG

REPLACE FRONT DOOR OUTSIDE HANDLE ASSEMBLY LH

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