WINDOW DEFOGGER SYSTEM Rear Window Defogger System does not Operate

DESCRIPTION

When the rear window defogger switch on the radio receiver assembly is pressed, the operation signal is transmitted to the air conditioning amplifier assembly through the AVC-LAN and LIN*1 or CAN*2 communication line. When the air conditioning amplifier assembly receives the signal, it turns on the RR DEF relay to operate the rear window defogger.


WIRING DIAGRAM

A01NGOIE05

INSPECTION PROCEDURE

Note


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

  • Since the window defogger system uses the AVC-LAN and LIN*1 or CAN*2 communication, first confirm that there is no malfunction in the AVC-LAN and LIN*1 or CAN*2 communication line. Refer to the How to Proceed with Troubleshooting procedure Click here.


  • *1: w/o Navigation System

  • *2: w/ Navigation System

PROCEDURE


  1. CHECK AIR CONDITIONING SYSTEM


    1. Check the air conditioning system.

      Tech Tips

      Both the window defogger system operation signal and air conditioning system operation signal are transmitted to the air conditioning amplifier assembly through 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


    1. Connect the intelligent tester to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the intelligent tester on.

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

    5. 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 window defogger system operates normally.

    NG

    INSPECT RR DEF RELAY Click here

    OK

    REPLACE RADIO RECEIVER ASSEMBLY Click here

  3. INSPECT RR DEF RELAY


    1. A01NG3KE01
      Text in Illustration
      *1

      Component without harness connected

      (RR DEF Relay)

      Remove the RR DEF relay from the engine room relay block assembly.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      3 - 4 Auxiliary battery voltage applied between terminals 1 and 2 10 kΩ or higher
      3 - 4 Auxiliary battery voltage not applied between terminals Below 1 Ω
      3 - 5 Auxiliary battery voltage applied between terminals 1 and 2 Below 1 Ω
      3 - 5 Auxiliary battery voltage not applied between terminals 10 kΩ or higher

    NG

    REPLACE RR DEF RELAY

    OK

  4. CHECK HARNESS AND CONNECTOR (RR DEF RELAY POWER SOURCE)


    1. A01NHN6E01
      Text in Illustration
      *1

      Front view of wire harness connector

      (to RR DEF Relay)
      *2 RR DEF Relay Terminal

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      Engine room relay block RR DEF relay terminal 1 - Body ground Power switch off Below 1 V
      Engine room relay block RR DEF relay terminal 1 - Body ground Power switch on (IG) 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. CHECK HARNESS AND CONNECTOR (ENGINE ROOM RELAY BLOCK - AIR CONDITIONING AMPLIFIER)


    1. A01NH4ME01
      Text in Illustration
      *1

      Front view of wire harness connector

      (to RR DEF Relay)
      *2 RR DEF Relay Terminal
      *3

      Front view of wire harness connector

      (to Air Conditioning Amplifier Assembly)

      Disconnect the F50 connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      Engine room relay block RR DEF relay terminal 2 - F50-38 (DFG) Always Below 1 Ω
      F50-14 (GND) - Body ground Always Below 1 Ω
      F50-38 (DFG) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. INSPECT AIR CONDITIONING AMPLIFIER ASSEMBLY


    1. A01NE0LE05
      Text in Illustration
      *1

      Component without harness connected

      (Air Conditioning Amplifier Assembly)

      Install the RR DEF relay to the engine room relay block assembly.

    2. Reconnect the F50 connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      F50-38 (DFG) - F50-14 (GND) Power switch on (IG), rear window defogger switch off 11 to 14 V
      F50-38 (DFG) - F50-14 (GND) Power switch on (IG), rear window defogger switch on Below 1 V

    NG

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Click here

    OK

  7. CHECK HARNESS AND CONNECTOR (REAR WINDOW DEFOGGER POWER SOURCE)


    1. A01NHN6E01
      Text in Illustration
      *1

      Front view of wire harness connector

      (to RR DEF Relay)
      *2 RR DEF Relay Terminal

      Remove the RR DEF relay from the engine room relay block assembly.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      Engine room relay block RR DEF relay terminal 5 - Body ground Power switch off 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  8. CHECK HARNESS AND CONNECTOR (RR DEF RELAY - RADIO SETTING CONDENSER)


    1. A01NCX8E02
      Text in Illustration
      *1

      Front view of wire harness connector

      (to RR DEF Relay)
      *2 RR DEF Relay Terminal
      *3

      Front view of wire harness connector

      (to Radio Setting Condenser)

      Disconnect the P64 connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      Engine room relay block RR DEF relay terminal 3 - P64-2 (DEF+) Always Below 1 Ω
      Engine room relay block RR DEF relay terminal 3 - Body ground Always 10 kΩ or higher
      P64-2 (DEF+) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  9. REPLACE RADIO SETTING CONDENSER


    1. Replace the radio setting condenser.

    2. Check the rear window defogger operation.

      OK
      The rear window defogger operated normally.

    NG

    CHECK HARNESS AND CONNECTOR (RADIO SETTING CONDENSER - REAR WINDOW DEFOGGER WIRE) Click here

    OK

    END (RADIO SETTING CONDENSER WAS DEFECTIVE)

  10. CHECK HARNESS AND CONNECTOR (RADIO SETTING CONDENSER - REAR WINDOW DEFOGGER WIRE)


    1. A01ND1VE05
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Radio Setting Condenser)
      *2

      Front view of wire harness connector

      (to Rear Window Defogger Wire)

      Disconnect the P64 connector.

    2. Disconnect the Y8 rear window defogger wire auxiliary battery side connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      P64-1 (DEF-) - Y8-1 Always Below 1 Ω
      P64-1 (DEF-) - Body ground Always 10 kΩ or higher
      Y8-1 - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  11. INSPECT BACK DOOR GLASS (REAR WINDOW DEFOGGER WIRE)


    1. A01NE1ME01
      Text in Illustration
      *1

      Component without harness connected

      (Rear Window Defogger Wire (Back Door Glass))
      *2 Body Ground Side
      *3 Auxiliary Battery Side

      Disconnect the Y16 rear window defogger wire body ground side connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      1 - 1 Always Below 1 Ω

    NG

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

    OK

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


    1. A01NFBXE01
      Text in Illustration
      *1

      Front view of wire harness connector

      (Rear Window Defogger Wire (Back Door Glass))
      *2 Body Ground Side

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      Y16-1 - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Click here