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 transmitted from the instrument cluster finish panel assembly to the air conditioning amplifier assembly. Upon receipt of the signal, the air conditioning amplifier assembly turns on the DEF relay to activate the rear window defogger system.

WIRING DIAGRAM

A005HFWE01

CAUTION / NOTICE / HINT

Note

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

PROCEDURE


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


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the tester on.

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

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

      Air Conditioner
      Tester Display Test Part Control Range Diagnostic Note
      Defogger Relay (Rear) DEF relay OFF or ON -
      OK
      Rear window defogger operates on and off.

    NG

    CHECK HARNESS AND CONNECTOR (DEF RELAY - BACK DOOR GLASS (REAR WINDOW DEFOGGER)) Click here

    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 AIR CONDITIONING CONTROL ASSEMBLY


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


    NEXT

  4. CHECK AIR CONDITIONING CONTROL ASSEMBLY (OPERATION)


    1. Check that the malfunction disappears.

      OK
      Malfunction disappears.

    OK

    END (AIR CONDITIONING CONTROL ASSEMBLY IS DEFECTIVE)

    NG

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Click here

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


    1. A005I2JE02
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Back Door Glass (Rear Window Defogger))

      Disconnect the P6 rear window defogger connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      P6-1 - Body ground

      Engine running

      Rear window defogger switch ON

      		 11 to 14 V

    NG

    INSPECT DEF RELAY Click here

    OK

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


    1. Disconnect the Q1 rear window defogger connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      Q1-1- Body ground Always Below 1 Ω

    OK

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

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  7. INSPECT DEF RELAY


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

    2. Inspect the DEF relay Click here.


    NG

    REPLACE DEF RELAY

    OK

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


    1. A005JBXE02
      Text in Illustration
      *1 Engine Room Relay Block
      *2 DEF Relay

      Remove the DEF relay from the center relay block assembly.

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

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

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. Remove the DEF relay from the center relay block assembly.

    2. Disconnect the F42 air conditioning amplifier assembly connector.

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

      Standard Resistance (Check for Open)
      Tester Connection Condition Specified Condition
      DEF relay terminal 2 - F42-38 (RDFG) Always Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      F42-38 (RDFG) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. Disconnect the P6 and Q1 rear window defogger connectors.

    2. Remove the DEF relay from the center relay block assembly.

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

      Standard Resistance (Check for Open)
      Tester Connection Condition Specified Condition
      P6-1 - DEF relay terminal 3 Always Below 1 Ω
      Q1-1 - Body ground Always Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      P6-1 - Body ground Always 10 kΩ or higher

    OK

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR