Key Reminder Warning System Key Reminder Buzzer Does Not Sound

Vehicle Interior. Land Cruiser. Urj200, 202 Grj200 Vdj200
Door Lock. Land Cruiser. Urj200, 202 Grj200 Vdj200

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

READ VALUE USING INTELLIGENT TESTER (FRONT DOOR COURTESY LIGHT SWITCH)

READ VALUE USING INTELLIGENT TESTER (UNLOCK WARNING SWITCH)

INSPECT UNLOCK WARNING SWITCH ASSEMBLY

CHECK HARNESS AND CONNECTOR (UNLOCK WARNING SWITCH ASSEMBLY - MAIN BODY ECU AND BODY GROUND)

CHECK COMBINATION METER ASSEMBLY (OPERATION)

KEY REMINDER WARNING SYSTEM - Key Reminder Buzzer does not Sound


DESCRIPTION

The key reminder warning buzzer sounds when the driver side door is opened while the ignition switch is ACC or off and the key is in the ignition key cylinder. The key reminder warning buzzer is activated when the main body ECU sends an unlock warning switch signal and front door courtesy light switch LH*1 or RH*2 signal to the combination meter.
  1. *1: for LHD
  2. *2: for RHD

WIRING DIAGRAM


Land Cruiser. Urj200, 202 Grj200 Vdj200.Door Lock.Power Door Lock Control System.Key Reminder Warning System Key Reminder Buzzer Does Not Sound


INSPECTION PROCEDURE

HINT:
Since the key reminder warning system has functions that use CAN communication, first confirm that there is no malfunction in the communication system by inspecting CAN communication in accordance with the "How to Proceed with Troubleshooting" procedures. Then, conduct the following inspection procedure.
1.READ VALUE USING INTELLIGENT TESTER (FRONT DOOR COURTESY LIGHT SWITCH)

  1. Check the Data List for proper functioning of the front door courtesy light switch (Click here).

    Main Body
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    D Door Courtesy SW
    		Driver side door courtesy light switch signal / ON or OFF
    		ON: Driver side door opened
    OFF: Driver side door closed
    		-


NG
GO TO LIGHTING SYSTEM (Click here)
OK


2.READ VALUE USING INTELLIGENT TESTER (UNLOCK WARNING SWITCH)

  1. Check the Data List for proper functioning of the unlock warning switch (Click here).

    Main Body
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    Key Unlock Warning SW
    		Unlock warning switch signal / ON or OFF
    		ON: Key in ignition key cylinder
    OFF: No key in ignition key cylinder
    		-
    OK:
    On tester screen, item changes between ON and OFF according to above chart.


NG
Go to step 3
OK

REPLACE MAIN BODY ECU (COWL SIDE JUNCTION BLOCK LH)

3.INSPECT UNLOCK WARNING SWITCH ASSEMBLY


    Land Cruiser. Urj200, 202 Grj200 Vdj200.Door Lock.Power Door Lock Control System.Key Reminder Warning System Key Reminder Buzzer Does Not Sound

  1. Remove the unlock warning switch (Click here).

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

    Standard Resistance:
    Tester Connection
    		Switch Condition
    		Specified Condition
    1 (UN+) - 2 (UN-)
    		Not pushed
    		10 kΩ or higher
    Pushed
    		Below 1 Ω


NG
REPLACE UNLOCK WARNING SWITCH ASSEMBLY (Click here)
OK


4.CHECK HARNESS AND CONNECTOR (UNLOCK WARNING SWITCH ASSEMBLY - MAIN BODY ECU AND BODY GROUND)

  1. Disconnect the E94 unlock warning switch connector.

  1. Disconnect the E4 main body ECU connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    E94-1 (UN+) - E4-5 (KSW)
    		Always
    		Below 1 Ω
    E94-2 (UN-) - Body ground
    		Always
    		Below 1 Ω
    E94-1 (UN+) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


5.CHECK COMBINATION METER ASSEMBLY (OPERATION)

  1. Temporarily replace the combination meter assembly with a new or normally functioning one (Click here).

  1. Check the key reminder warning system (Click here).

    OK:
    The key reminder warning system functions properly.


NG
REPLACE MAIN BODY ECU (COWL SIDE JUNCTION BLOCK LH)
OK

END (COMBINATION METER ASSEMBLY IS DEFECTIVE)