ENTRY AND START SYSTEM(for Entry Function) Driver Side Door Entry Unlock Function does not Operate

DESCRIPTION

If the driver side door entry unlock function does not operate but the entry lock function operates, the communication between the vehicle and electrical key transmitter is normal. The malfunctioning part may be the unlock sensor circuit (from certification ECU (smart key ECU assembly) to the front door outside handle assembly (for driver side electrical key antenna)).

WIRING DIAGRAM

CAUTION / NOTICE / HINT

Note

The entry and start system (for entry function) uses a multiplex communication system (LIN communication system) and CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting Click here. Troubleshoot the entry and start system (for entry function) after confirming that the communication system is functioning properly.
When using the intelligent tester with the engine switch off to troubleshoot: Connect the intelligent tester to the DLC3, and turn a courtesy light switch on and off at 1.5-second intervals until communication between the tester and vehicle begins
Check that there are no electrical key transmitters in the vehicle.
Before performing the inspection, check that DTC B1242 (wireless door lock control) is not output Click here.
When checking the entry lock operation multiple times, the lock operation may be limited to 2 consecutive operations depending on the settings. In order to perform the entry lock operation 3 or more times, an unlock operation must be performed once (any type of unlock operation is sufficient). However, only consecutive entry lock operations are limited. Using the wireless lock or other types of lock operations, it is possible to perform consecutive lock operations without this limitation.
Before replacing the certification ECU (smart key ECU assembly), refer to the entry and start system (for entry function) Click here.
After repair, confirm DTC not reoccur with performing the "DTC Output Confirmation Operation".

PROCEDURE

CHECK POWER DOOR LOCK OPERATION
1. When the door control switch on the master switch assembly is operated, check that the doors unlock and lock according to switch operation Click here.
  
  OK
  
  Door locks operate normally.
NG
GO TO POWER DOOR LOCK CONTROL SYSTEM (PROCEED TO PROBLEM SYMPTOMS TABLE) Click here

OK

OK
Door locks operate normally.

READ VALUE USING INTELLIGENT TESTER (DOOR LOCK POSITION SWITCH)

Connect the intelligent tester to the DLC3.
Turn the engine switch on (IG).
Turn the intelligent tester on.
Enter the following menus: Body / Main Body / Data List.

Read the Data List according to the display on the intelligent tester.

Main Body
Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
FL Door Lock Pos*1	Front LH door lock position switch signal / UNLOCK or LOCK	UNLOCK: Front LH side door unlocked LOCK: Front LH side door locked	-
FR Door Lock Pos*2	Front RH door lock position switch signal / UNLOCK or LOCK	UNLOCK: Front RH side door unlocked LOCK: Front RH side door locked	-

*1: for LHD
*2: for RHD

OK
On the intelligent tester screen, the display changes between ON and OFF as shown in the table above.

GO TO POWER DOOR LOCK CONTROL SYSTEM (PROCEED TO PROBLEM SYMPTOMS TABLE) Click here

READ VALUE USING INTELLIGENT TESTER (D-DOOR TOUCH SENSOR)

Connect the intelligent tester to the DLC3.
Turn the engine switch on (IG).
Turn the intelligent tester on.
Enter the following menus: Body / Entry & Start / Data List.

Read the Data List according to the display on the intelligent tester.

Entry & Start
Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
D-Door Touch Sensor	Status of unlock sensor (for driver side) / ON or OFF	ON: Unlock sensor touched OFF: Unlock sensor not 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.

OK
On the intelligent tester screen, the display changes between ON and OFF as shown in the table above.

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - FRONT DOOR OUTSIDE HANDLE ASSEMBLY)

Disconnect the F63 certification ECU (smart key ECU assembly) connector.
Disconnect the H11*1 or G10*2 front door outside handle assembly connector.
- *1: for LHD
- *2: for RHD

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

Standard Resistance (Check for Open)

for LHD
Tester Connection	Condition	Specified Condition
F63-22 (SEN1) - H11-4 (SENS)	Always	Below 1 Ω

for RHD
Tester Connection	Condition	Specified Condition
F63-22 (SEN1) - G10-4 (SENS)	Always	Below 1 Ω

Standard Resistance (Check for Short)

for LHD
Tester Connection	Condition	Specified Condition
F63-22 (SEN1) - Body ground	Always	10 kΩ or higher
H11-4 (SENS) - Body ground	Always	10 kΩ or higher

for RHD
Tester Connection	Condition	Specified Condition
F63-22 (SEN1) - Body ground	Always	Below 1 Ω
G10-4 (SENS) - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

INSPECT FRONT DOOR OUTSIDE HANDLE ASSEMBLY

Text in Illustration
*a	Component with harness connected (Certification ECU (smart key ECU assembly))	-	-

Reconnect the F63 certification ECU (smart key ECU assembly) connector.
Reconnect the H11*1 or G10*2 front door outside handle assembly connector.
- *1: for LHD
- *2: for RHD

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

Standard Voltage

Tester Connection	Condition	Specified Condition
F63-22 (SEN1) - F65-11 (E)	Engine switch off, all doors closed, and unlock sensor (driver side) off → on	Pulse generation → Below 2 V

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

REPLACE FRONT DOOR OUTSIDE HANDLE ASSEMBLY Click here