WINDOW DEFOGGER SYSTEM > Rear Window Defogger System does not Operate

for Preparation Click here


DESCRIPTION

When the rear window defogger switch on the air conditioning control panel is pressed, the operation signal is transmitted to the air conditioning amplifier assembly through a LIN communication line. When the air conditioning amplifier assembly receives the signal, it turns on the No. 1 integration relay to operate the rear window defogger.

WIRING DIAGRAM


B235141E05


INSPECTION PROCEDURE

NOTICE:
  1. Inspect the fuses for circuits related to this system before performing the following inspection procedure.
  2. If the auxiliary battery voltage becomes low, rear window defogger operation is canceled to prioritize supplying power to the power steering system.

1.CHECK AIR CONDITIONING SYSTEM

  1. Check the air conditioning system.

    HINT:
    Both the window defogger system operation signal and air conditioning system operation signal are transmitted to the air conditioning amplifier assembly through the same communication line.

    OK:
    The air conditioning system operates normally.



NG
GO TO AIR CONDITIONING SYSTEM (Click here)
OK


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

  1. Connect the intelligent tester to the DLC3.

  1. Turn the power switch on (IG).

  1. Turn the intelligent tester on.

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

  1. Perform the Active Test according to the display on the intelligent tester.

    Air Conditioner (Air Conditioning Amplifier Assembly) 
    Tester Display
    		Test Part
    		Control Range
    		Diagnostic Note
    Defogger Relay (Rear)
    		Rear window defogger
    		OFF or ON
    		-

    OK:
    The rear window defogger system operates normally.



NG
Go to step 3
OK

REPLACE AIR CONDITIONING CONTROL PANEL (CENTER CLUSTER MODULE CIRCUIT) (Click here)  

3.CHECK HARNESS AND CONNECTOR (NO. 1 INTEGRATION RELAY - BATTERY AND BODY GROUND)

  1. Disconnect the 1G and 1H No. 1 integration relay connectors.

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

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    1H-7 (BATT) - Body ground
    		Power switch off
    		11 to 14 V
    1G-14 (IG1) - Body ground
    		Power switch on (IG)
    		11 to 14 V
    1G-14 (IG1) - Body ground
    		Power switch off
    		Below 1 V

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    1G-22 (GND1) - Body ground
    		Always
    		Below 1 Ω
    1H-3 (GND2) - Body ground
    		Always
    		Below 1 Ω



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


4.CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER - NO. 1 INTEGRATION RELAY)

  1. Disconnect the H85 air conditioning amplifier assembly connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    H85-20 (SW7) - 1G-15 (DEF)
    		Always
    		Below 1 Ω
    1G-15 (DEF) - Body ground
    		Always
    		10 kΩ or higher
    H85-14 (GND) - Body ground
    		Always
    		Below 1 Ω



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


5.CHECK NO. 1 INTEGRATION RELAY

  1. Reconnect the 1G and 1H No. 1 integration relay connectors.

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

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    H85-20 (SW7) - Body ground
    		Always
    		11 to 14 V



NG
REPLACE NO. 1 INTEGRATION RELAY (Click here)
OK


6.CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY


    B202140E23

  1. Reconnect the H85 air conditioning amplifier assembly connector.

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

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    H85-20 (SW7) - H85-14 (GND)
    		Power switch on (IG), rear window defogger switch off
    		11 to 14 V
    H85-20 (SW7) - H85-14 (GND)
    		Power switch on (IG), rear window defogger switch on
    		Below 1 V

    Text in Illustration 
    *a
    		Rear view of wire harness connector
    (to Air Conditioning Amplifier Assembly)



NG
REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY (Click here)
OK


7.INSPECT RADIO SETTING CONDENSER

  1. Remove the radio setting condenser (Click here).



    E183893E05

  1. Measure the resistance of the radio setting condenser according to the value(s) in the table below.

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    1 - 2
    		Always
    		10 kΩ or higher
    2 - 3
    		Always
    		10 kΩ or higher
    1 - 3
    		Always
    		10 kΩ or higher

    Text in Illustration 
    *a
    		Radio Setting Condenser



NG
REPLACE RADIO SETTING CONDENSER (Click here)
OK


8.CHECK HARNESS AND CONNECTOR (NO. 1 INTEGRATION RELAY - REAR WINDOW DEFOGGER WIRE)

  1. Disconnect the V10 rear window defogger wire (back door glass) battery side connector.

  1. Disconnect the 1I No. 1 integration relay connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    1I-1 (RDEF) - Body ground
    		Always
    		10 kΩ or higher
    1I-1 (RDEF) - V10-1
    		Always
    		Below 1 Ω



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


9.CHECK NO. 1 INTEGRATION RELAY

  1. Reconnect the 1I No. 1 integration relay connector.

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

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    V10-1 - Body ground
    		Power switch on (IG), rear window defogger switch on
    		11 to 14 V
    V10-1 - Body ground
    		Power switch on (IG), rear window defogger switch off
    		Below 1 V



NG
Go to step 11
OK


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

  1. Disconnect the V7 rear window defogger wire (back door glass) ground side connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    V7-1 - Body ground
    		Always
    		Below 1 Ω



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

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

11.REPLACE NO. 1 INTEGRATION RELAY

  1. Replace the No. 1 integration relay (Click here).


NEXT


12.CHECK WINDOW DEFOGGER SYSTEM

  1. Check the operation of the window defogger system.

    OK:
    The rear window defogger system operates normally.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE)
OK

END (NO. 1 INTEGRATION RELAY WAS DEFECTIVE)