Window Defogger System Rear Window Defogger System Does Not Operate

Vehicle Exterior. Land Cruiser. Urj200, 202 Grj200 Vdj200
Window Glass. Land Cruiser. Urj200, 202 Grj200 Vdj200

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

PERFORM ACTIVE TEST USING INTELLIGENT TESTER (DEFOGGER RELAY)

REPLACE AIR CONDITIONING CONTROL ASSEMBLY

CHECK WINDOW DEFOGGER SYSTEM

CHECK NAVIGATION SYSTEM

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY

CHECK WINDOW DEFOGGER SYSTEM

REPLACE MULTI-MEDIA MODULE RECEIVER ASSEMBLY

CHECK WINDOW DEFOGGER SYSTEM

INSPECT DEFOGGER RELAY (DEFOG)

CHECK HARNESS AND CONNECTOR (DEFOGGER RELAY - AIR CONDITIONING AMPLIFIER AND BATTERY)

CHECK HARNESS AND CONNECTOR (REAR WINDOW DEFOGGER - DEFOGGER RELAY AND BODY GROUND)

CHECK REAR WINDOW DEFOGGER WIRE

CHECK HARNESS AND CONNECTOR (DEFOGGER RELAY - AIR CONDITIONING AMPLIFIER AND BATTERY)

CHECK HARNESS AND CONNECTOR (REAR WINDOW DEFOGGER - DEFOGGER RELAY AND BODY GROUND)

CHECK REAR WINDOW DEFOGGER WIRE

WINDOW DEFOGGER SYSTEM - Rear Window Defogger System does not Operate


DESCRIPTION

When the rear window defogger switch is turned on, a rear window defogger activation request signal is sent via the LIN communication line*1 or CAN communication line and *2 to the air conditioning amplifier assembly. Then the air conditioning amplifier assembly operates the rear window defogger. When the on signal from the switch is received, the defogger relay (DEFOG) is operated for 15 minutes. Also, if the off signal from the switch is received within 15 minutes, the defogger relay (DEFOG) operation is stopped.
HINT:
*1: w/o Navigation System
*2: w/ Navigation System

WIRING DIAGRAM


Land Cruiser. Urj200, 202 Grj200 Vdj200.Window Glass.Power Window Control System (For Models With Jam Protection Function On 4 Windows).Window Defogger System Rear Window Defogger System Does Not Operate


INSPECTION PROCEDURE

NOTICE:
Inspect the fuses for circuits related to this system before performing the following inspection procedure.
First perform the communication function inspections in How to Proceed with Troubleshooting to confirm that there are no CAN communication and LIN communication malfunctions before troubleshooting this symptom.
1.PERFORM ACTIVE TEST USING INTELLIGENT TESTER (DEFOGGER RELAY)

  1. Select the Active Test using the intelligent tester to generate a control command, and then check that the rear window defogger operates (Click here).

    Air Conditioner
    Tester Display
    		Test Part
    		Control Range
    		Diagnostic Note
    Defogger Relay (Rear)
    		Rear window defogger relay operation
    		OFF or ON
    		-
    OK:
    On intelligent tester screen, item changes between ON and OFF according to above chart.
    Result
    Result
    		Proceed to
    OK (w/o Navigation System)
    		A
    OK (w/ Navigation System)
    		B
    NG
    		C


B
Go to step 4

C
Go to step 9
A


2.REPLACE AIR CONDITIONING CONTROL ASSEMBLY

  1. Temporarily replace the air conditioning control assembly with a new or normally functioning one (Click here).


NEXT


3.CHECK WINDOW DEFOGGER SYSTEM

  1. Turn the ignition switch ON.

  1. Check that pressing the defogger switch illuminates the indicator and warms the rear window surface.

  1. Check that after approximately 15 minutes, the indicator light turns off and the rear window defogger deactivates.

    OK:
    Rear window defogger system functioning normally.


NG
REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY (Click here)
OK

END (AIR CONDITIONING CONTROL ASSEMBLY IS DEFECTIVE)

4.CHECK NAVIGATION SYSTEM

  1. Check if the navigation system function properly (Click here).

    OK:
    Navigation system function properly.


NG
GO TO NAVIGATION SYSTEM (Click here)
OK


5.REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY

  1. Temporarily replace the air conditioning amplifier assembly with a new or normally functioning one (Click here).


NEXT


6.CHECK WINDOW DEFOGGER SYSTEM

  1. Turn the ignition switch ON.

  1. Check that pressing the defogger switch illuminates the indicator and warms the rear window surface.

  1. Check that after approximately 15 minutes, the indicator light turns off and the rear window defogger deactivates.

    OK:
    Rear window defogger system functioning normally.


NG
Go to step 7
OK

END (AIR CONDITIONING AMPLIFIER ASSEMBLY IS DEFECTIVE)

7.REPLACE MULTI-MEDIA MODULE RECEIVER ASSEMBLY

  1. Temporarily replace the multi-media module receiver assembly with a new or normally functioning one (Click here).


NEXT


8.CHECK WINDOW DEFOGGER SYSTEM

  1. Turn the ignition switch ON.

  1. Check that pressing the defogger switch illuminates the indicator and warms the rear window surface.

  1. Check that after approximately 15 minutes, the indicator light turns off and the rear window defogger deactivates.

    OK:
    Rear window defogger system functioning normally.


NG
REPLACE MULTI-DISPLAY (Click here)
OK

END (MULTI-MEDIA MODULE RECEIVER ASSEMBLY IS DEFECTIVE)

9.INSPECT DEFOGGER RELAY (DEFOG)


    Land Cruiser. Urj200, 202 Grj200 Vdj200.Window Glass.Power Window Control System (For Models With Jam Protection Function On 4 Windows).Window Defogger System Rear Window Defogger System Does Not Operate

  1. Remove the defogger relay from the engine room junction block.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    3 - 4
    		Battery voltage is not applied to terminals 1 and 2
    		Below 1 Ω
    3 - 5
    		10 kΩ or higher
    3 - 4
    		Battery voltage is applied to terminals 1 and 2
    		10 kΩ or higher
    3 - 5
    		Below 1 Ω
    Result
    Result
    		Proceed to
    OK (w/ Rear Heater)
    		A
    OK (w/o Rear Heater)
    		B
    NG
    		C


B
Go to step 13

C
REPLACE DEFOGGER RELAY
A


10.CHECK HARNESS AND CONNECTOR (DEFOGGER RELAY - AIR CONDITIONING AMPLIFIER AND BATTERY)


    Land Cruiser. Urj200, 202 Grj200 Vdj200.Window Glass.Power Window Control System (For Models With Jam Protection Function On 4 Windows).Window Defogger System Rear Window Defogger System Does Not Operate

  1. Remove the defogger relay from the engine room relay block.

  1. Disconnect the E36 air conditioning amplifier assembly connector.

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

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    Defogger relay terminal 1 - Body ground
    		Ignition switch ON
    		11 to 14 V
    Defogger relay terminal 5 - Body ground
    		Always
    		11 to 14 V

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    Defogger relay terminal 2 - E36-25 (RDEF)
    		Always
    		Below 1 Ω


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


11.CHECK HARNESS AND CONNECTOR (REAR WINDOW DEFOGGER - DEFOGGER RELAY AND BODY GROUND)


  1. Disconnect the S20 and S21 defogger wire connectors.


    Land Cruiser. Urj200, 202 Grj200 Vdj200.Window Glass.Power Window Control System (For Models With Jam Protection Function On 4 Windows).Window Defogger System Rear Window Defogger System Does Not Operate

  1. Remove the defogger relay from the engine room relay block.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    S17-1(B) - Defogger relay terminal 3
    		Always
    		Below 1 Ω
    S18-1(B) - Body ground
    Defogger relay terminal 4 - Body ground
    S17-1(B) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


12.CHECK REAR WINDOW DEFOGGER WIRE


    Land Cruiser. Urj200, 202 Grj200 Vdj200.Window Glass.Power Window Control System (For Models With Jam Protection Function On 4 Windows).Window Defogger System Rear Window Defogger System Does Not Operate

  1. Disconnect the S20 and S21 defogger wire connectors.

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

    Standard Resistance:
    Tester Connection
    		Switch Condition
    		Specified Condition
    S17-1 (B) - S18-1 (E)
    		Ignition switch ON and defogger switch on
    		10 kΩ or higher


NG
REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY (Click here)
OK

REPLACE BACK WINDOW GLASS (Click here)

13.CHECK HARNESS AND CONNECTOR (DEFOGGER RELAY - AIR CONDITIONING AMPLIFIER AND BATTERY)


    Land Cruiser. Urj200, 202 Grj200 Vdj200.Window Glass.Power Window Control System (For Models With Jam Protection Function On 4 Windows).Window Defogger System Rear Window Defogger System Does Not Operate

  1. Remove the defogger relay from the engine room relay block.

  1. Disconnect the E81 air conditioning amplifier assembly connector.

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

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    Defogger relay terminal 1 - Body ground
    		Ignition switch ON
    		11 to 14 V
    Defogger relay terminal 5 - Body ground
    		Always
    		11 to 14 V

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    Defogger relay terminal 2 - E81-38 (RDEF)
    		Always
    		Below 1 Ω


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


14.CHECK HARNESS AND CONNECTOR (REAR WINDOW DEFOGGER - DEFOGGER RELAY AND BODY GROUND)


  1. Disconnect the S20 and S21 defogger wire connectors.


    Land Cruiser. Urj200, 202 Grj200 Vdj200.Window Glass.Power Window Control System (For Models With Jam Protection Function On 4 Windows).Window Defogger System Rear Window Defogger System Does Not Operate

  1. Remove the defogger relay from the engine room relay block.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    S17-1(B) - Defogger relay terminal 3
    		Always
    		Below 1 Ω
    S18-1(B) - Body ground
    Defogger relay terminal 4 - Body ground
    S17-1(B) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


15.CHECK REAR WINDOW DEFOGGER WIRE


    Land Cruiser. Urj200, 202 Grj200 Vdj200.Window Glass.Power Window Control System (For Models With Jam Protection Function On 4 Windows).Window Defogger System Rear Window Defogger System Does Not Operate

  1. Disconnect the S20 and S21 defogger wire connectors.

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

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    S17-1 (B) - S18-1 (E)
    		Ignition switch ON and defogger switch on
    		11 to 14 V


NG
REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY (Click here)
OK

REPLACE BACK WINDOW GLASS (Click here)