WINDOW DEFOGGER SYSTEM > Rear Window Defogger System does not Operate

for Preparation Click here


DESCRIPTION

When the rear defogger switch is turned on, a rear defogger activation request signal is transmitted from the instrument cluster finish panel assembly to the air conditioning amplifier. Upon receipt of the signal, the air conditioning amplifier turns on the defogger relay to activate the rear window defogger system.

WIRING DIAGRAM


B214253E01


INSPECTION PROCEDURE

NOTICE:
Inspect the fuses for circuits related to this system before performing the following inspection procedure.

1.PERFORM ACTIVE TEST USING INTELLIGENT TESTER (DEFOGGER RELAY)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch to ON.

  1. Turn the tester on.

  1. Enter the following menus: Body / Air Conditioner / Active Test.

  1. According to the display on the tester, perform the Active Test.

    Air Conditioner 
    Tester Display
    		Test Part
    		Control Range
    		Diagnostic Note
    Defogger Relay (Rear)
    		Defogger relay
    		OFF or ON
    		-

    OK:
    Defogger operates on and off.



NG
Go to step 5
OK


2.CHECK AIR CONDITIONING SYSTEM (LIN COMMUNICATION)

  1. Operate the switch to change the instrument cluster finish panel set temperature and check that the temperature at the outlets changes.

    OK:
    The outlet temperature changes in accordance with the instrument cluster finish panel display.



NG
GO TO AIR CONDITIONING CONTROL PANEL CIRCUIT (Click here)
OK


3.REPLACE INSTRUMENT CLUSTER FINISH PANEL ASSEMBLY

  1. Temporarily replace the instrument cluster finish panel assembly with a new or normally functioning one (Click here).


NEXT


4.CHECK INSTRUMENT CLUSTER FINISH PANEL ASSEMBLY (OPERATION)

  1. Check that the malfunction disappears.

    OK:
    Malfunction disappears.



NG
REPLACE AIR CONDITIONING AMPLIFIER (Click here)
OK

END (INSTRUMENT CLUSTER FINISH PANEL ASSEMBLY IS DEFECTIVE) 

5.CHECK HARNESS AND CONNECTOR (DEFOGGER RELAY - BACK DOOR GLASS (REAR DEFOGGER))


    B210248E01

  1. Disconnect the I1 rear defogger connector.

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

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    I1-1 - Body ground
    		Engine running
    Rear defogger switch ON
    		11 to 14 V

    Text in Illustration 
    *1
    		Front view of wire harness connector
    (to Back Door Glass (Rear Defogger))

  1. Reconnect the rear defogger connector.



NG
Go to step 7
OK


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


    B210248E02

  1. Disconnect the K1 rear defogger connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    K1-1- Body ground
    		Always
    		Below 1 Ω

    Text in Illustration 
    *1
    		Front view of wire harness connector
    (to Back Door Glass (Rear Defogger))

  1. Reconnect the rear defogger connector.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPAIR OR REPLACE BACK DOOR GLASS (REAR WINDOW DEFOGGER) (Click here)  

7.INSPECT DEFOGGER RELAY


    B016200

  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
    3 - 5
    		When battery voltage is not applied between terminals 1 and 2
    		10 kΩ or higher
    When battery voltage is applied to terminals 1 and 2
    		Below 1 Ω

  1. Reinstall the defogger relay.



NG
REPLACE DEFOGGER RELAY
OK


8.CHECK HARNESS AND CONNECTOR (DEFOGGER RELAY - BATTERY)


    B210245E01

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

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

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    Defogger relay terminal 1 - Body ground
    		Ignition switch ON
    		11 to 14 V
    Defogger relay terminal 3 - Body ground
    		Always
    		11 to 14 V

    Text in Illustration 
    *1
    		Component without relay connected
    (Engine Room Relay Block)
    *2
    		Defogger Relay

  1. Reinstall the defogger relay.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


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


    B210246E01

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

  1. Disconnect the D15 air conditioning amplifier connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    Defogger relay terminal 2 - D15-38 (RDEF)
    		Always
    		Below 1 Ω

    Text in Illustration 
    *1
    		Component without relay connected
    (Engine Room Relay Block)
    *2
    		Front view of wire harness connectors
    (to Air Conditioning Amplifier)
    *3
    		Defogger Relay

  1. Reconnect the air conditioning amplifier connector.

  1. Reinstall the defogger relay.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


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


    B210247E01

  1. Disconnect the I1 and K1 defogger connectors.

  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
    I1-1 - Defogger relay terminal 5
    		Always
    		Below 1 Ω
    I1-1 - Body ground
    		Always
    		10 kΩ or higher
    K1-1 - Body ground
    		Always
    		Below 1 Ω

    Text in Illustration 
    *1
    		Component without relay connected
    (Engine Room Relay Block)
    *2
    		Front view of wire harness connector
    (to Rear Window Defogger)
    *3
    		Defogger Relay

  1. Reinstall the defogger relay.

  1. Reconnect the defogger connectors.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE AIR CONDITIONING AMPLIFIER (Click here)