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

for Preparation Click here


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 (certification ECU → front door outside handle assembly (for driver side)).

WIRING DIAGRAM


B216377E01


INSPECTION PROCEDURE

NOTICE:
  1. 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.
  2. 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

1.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


2.READ VALUE USING TECHSTREAM (DOOR LOCK POSITION SWITCH)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the engine switch on (IG).

  1. Turn the intelligent tester on.

  1. Enter the following menus: Body / Main Body / Data List.

  1. 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 / ON or OFF
    		ON: Front LH side door unlocked
    OFF: Front LH side door locked
    		-
    FR Door Lock Pos*2
    		Front RH door lock position switch signal / ON or OFF
    		ON: Front RH door unlocked
    OFF: Front RH side door locked
    		-

    1. *1: for LHD
    2. *2: for RHD

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


    Result 
    Result
    		Proceed to
    OK
    		A
    NG
    		B
    (Refer to "Only Driver Door LOCK/UNLOCK Functions do not Operate" in the problem symptoms table)



B
GO TO POWER DOOR LOCK CONTROL SYSTEM (Proceed to Problem Symptoms Table) (Click here)
A


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

  1. Connect the intelligent tester to the DLC3.

  1. Turn the engine switch on (IG).

  1. Turn the intelligent tester on.

  1. Enter the following menus: Body / Entry & Start / Data List.

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

    Entry and 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
    		-

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



NG
Go to step 4
OK

REPLACE CERTIFICATION ECU 

4.CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - DOOR OUTSIDE HANDLE)


    B199545E02

  1. Disconnect the certification ECU connector.

  1. Disconnect the front door outside handle assembly (for driver side) connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    R1-4 (SENS) - D34-20 (SEN1)*1
    		Always
    		Below 1 Ω
    Q1-4 (SENS) - D34-20 (SEN1)*2
    		Always
    		Below 1 Ω
    D34-20 (SEN1) - Body ground
    		Always
    		10 kΩ or higher

    1. *1: for LHD
    2. *2: for RHD
    Text in Illustration 
    *1
    		Front view of wire harness connector
    (to Front Door Outside Handle assembly)
    *2
    		Front view of wire harness connector
    (to Certification ECU)
    *3
    		for LHD
    *4
    		for RHD



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


5.INSPECT FRONT DOOR OUTSIDE HANDLE ASSEMBLY (FOR DRIVER SIDE)

  1. Reconnect the certification ECU and front door outside handle assembly (for driver side) connector.


B199699E01


Text in Illustration 
*1
Component with harness connected
(Certification ECU)

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

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    D34-20 (SENS1) - D34-15 (E)
    		Engine switch off, all doors closed, and unlock sensor (driver side) off → on
    		Pulse generation → Below 2V



NG
REPLACE FRONT DOOR OUTSIDE HANDLE ASSEMBLY (FOR DRIVER SIDE) (Click here)
OK

REPLACE CERTIFICATION ECU