WINDOW DEFOGGER SYSTEM Rear Window Defogger System does not Operate

DESCRIPTION

When the rear window defogger switch on the air conditioning control assembly is pressed, the operation signal is transmitted to the air conditioning amplifier assembly through the LIN communication line. When the air conditioning amplifier assembly receives the signal, it turns on the DEF relay to operate the rear window defogger.

WIRING DIAGRAM

A01EISIE04

INSPECTION PROCEDURE

Note

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

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 the same LIN communication line.

      Result
      Result Proceed to
      The air conditioning system operates normally. A
      The air conditioning system does not operate normally. B

    B

    GO TO AIR CONDITIONING SYSTEM Click here

    A

  2. PERFORM ACTIVE TEST USING GTS


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

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

    5. Perform the Active Test according to the display on the GTS.

      Air Conditioner
      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 DEF RELAY Click here

    OK

    REPLACE AIR CONDITIONING CONTROL ASSEMBLY Click here

  3. INSPECT DEF RELAY


    1. A01EK55E01

      Remove the DEF relay from the engine room relay block.

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

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

    NG

    REPLACE DEF RELAY

    OK

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


    1. A01EKACE01
      Text in Illustration
      *1 Engine Room Relay Block
      *2 DEF Relay Terminal

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      Engine room relay block DEF relay terminal 1 - Body ground Ignition switch off Below 1 V
      Engine room relay block DEF relay terminal 1 - Body ground Ignition switch ON 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. A01EKWOE01
      Text in Illustration
      *1 Engine Room Relay Block
      *2 DEF Relay Terminal
      *3

      Front view of wire harness connector

      (to Air Conditioning Amplifier Assembly)

      Disconnect the D47 air conditioning amplifier assembly 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 DEF relay terminal 1 - D47-18 (D) Always Below 1 Ω
      D47-14 (GND) - Body ground Always Below 1 Ω
      D47-18 (D) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. INSPECT AIR CONDITIONING AMPLIFIER ASSEMBLY


    1. A01EK11E03
      Text in Illustration
      *1

      Component with harness connected

      (Air Conditioning Amplifier Assembly)

      Install the DEF relay to the engine room relay block.

    2. Reconnect the D47 air conditioning amplifier assembly connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      D47-18 (D) - D47-14 (GND) Ignition switch ON, rear window defogger switch off 11 to 14 V
      D47-18 (D) - D47-14 (GND) Ignition switch ON, rear window defogger switch on Below 1 V

    NG

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Click here

    OK

  7. CHECK HARNESS AND CONNECTOR (DEF RELAY POWER SOURCE)


    1. A01EKACE01
      Text in Illustration
      *1 Engine Room Relay Block
      *2 DEF Relay Terminal

      Remove the DEF relay from the engine room relay block.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      Engine room relay block DEF relay terminal 5 - Body ground Always 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. A01EMNPE01
      Text in Illustration
      *1 Engine Room Relay Block
      *2 DEF Relay Terminal
      *3

      Front view of wire harness connector

      (to Radio Setting Condenser)

      Disconnect the R7 radio setting condenser connectors.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      R7-2 (DEF) - Engine room relay block DEF relay terminal 3 Always Below 1 Ω
      R7-2 (DEF) - Body ground Always 10 kΩ or higher
      Engine room relay block DEF relay terminal 3 - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. Disconnect the R16 rear window defogger connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      R7-1 (DEFB) - R16-1 (B) Always Below 1 Ω
      R7-1 (DEFB) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. A01EJECE01
      Text in Illustration
      *1

      Component without harness connector

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

      Disconnect the R15 rear window defogger connector.

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

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

    NG

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

    OK

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


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

      Standard Resistance
      Tester Connection Condition Specified Condition
      R15-1 - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  12. REPLACE RADIO SETTING CONDENSER


    1. Replace the radio setting condenser.


    NEXT

  13. CHECK REAR WINDOW DEFOGGER SYSTEM


    1. Turn the ignition switch to ON, press the rear window defogger switch, and check that the window defogger operates Click here.

      Result
      Result Proceed to
      The window defogger system operates normally A
      The window defogger system operate does not normally B

    B

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Click here

    A

    END