WINDSHIELD DEICER SYSTEM Windshield Deicer does not Operate

DESCRIPTION

When the windshield deicer switch is operated, the operation signal is transmitted to radio receiver assembly. Radio receiver assembly transmit the operation signal to the air conditioning amplifier assembly via CAN communication line. When the air conditioning amplifier assembly receives the signal, it turns on the No. 2 integration relay to operate the windshield deicer.

WIRING DIAGRAM

Refer to the "System Diagram"

Click here

CAUTION / NOTICE / HINT

Note


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

  • If the battery voltage becomes low, windshield deicer operation is canceled to prioritize supplying power to the power steering system

    Click here

PROCEDURE


  1. CHECK CAN COMMUNICATION SYSTEM


    1. Use the GTS to check if the CAN communication system is functioning normally


      Result
      Result Proceed to
      CAN DTC is not output A
      CAN DTC is output (for LHD) B
      CAN DTC is output (for RHD) C

    B

    GO TO CAN COMMUNICATION SYSTEM Click here

    C

    GO TO CAN COMMUNICATION SYSTEM Click here

    A

  2. PERFORM ACTIVE TEST USING GTS (DEICER RELAY (FRONT))


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    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.


      Body Electrical > Air Conditioner > Active Test
      Tester Display Measurement Item Control Range Diagnostic Note
      Deicer Relay (Front) Windshield glass (windshield deicer) OFF or ON -

      Body Electrical > Air Conditioner > Active Test
      Tester Display
      Deicer Relay (Front)
      OK
      The windshield deicer system operates normally.
      Result
      Proceed to
      OK
      NG

    NG

    CHECK HARNESS AND CONNECTOR (NO. 2 INTEGRATION RELAY - BATTERY AND BODY GROUND) Click here

    OK

  3. CHECK AVC-LAN COMMUNICATION LINE


    1. Check the AVC-LAN communication function to ensure there are no malfunctions in the communication system.


      • w/ Navigation System: Click here

      • for 8 Inch Display Type without Navigation System: Click here

      • for 12.3 Inch Display Type without Navigation System: Click here

      OK
      The AVC-LAN communication function operates normally.
      Result
      Result Proceed to
      OK A
      NG (w/ Navigation System) B
      NG (for 8 Inch Display Type without Navigation System) C
      NG (for 12.3 Inch Display Type without Navigation System) D

    A

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Click here

    B

    GO TO NAVIGATION SYSTEM Click here

    C

    GO TO AUDIO AND VISUAL SYSTEM Click here

    D

    GO TO AUDIO AND VISUAL SYSTEM Click here

  4. CHECK HARNESS AND CONNECTOR (NO. 2 INTEGRATION RELAY - BATTERY AND BODY GROUND)


    1. B002E7DC01
      *a

      Front view of wire harness connector

      (to No. 2 Integration Relay)

      Disconnect the No. 2 integration relay connectors.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      2G-1 (ALT) - Body ground Always 11 to 14 V
      2B-8 (IG1A) - Body ground Engine switch on (IG) 11 to 14 V
      2B-8 (IG1A) - Body ground Engine switch off Below 1 V

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      2B-10 (GNDB) - Body ground Always Below 1 Ω
      2A-22 (GNDA) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER ASSEMBLY - NO. 2 INTEGRATION RELAY AND BODY GROUND)


    1. Disconnect the K64 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
      K64-24 (FDEF) - 2A-25 (DEC) Always Below 1 Ω
      K64-24 (FDEF) - Body ground Always 10 kΩ or higher
      K64-1 (GND) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. CHECK NO. 2 INTEGRATION RELAY


    1. Reconnect the 2A, 2B and 2G No. 2 integration relay connectors.

    2. B002EARC11
      *a

      Rear view of wire harness connector

      (to Air Conditioning Amplifier Assembly)

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      K64-24 (FDEF) - Body ground Engine switch off Below 1 V
      K64-24 (FDEF) - Body ground Engine switch on (IG) 11 to 14 V
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE NO. 2 INTEGRATION RELAY Click here

    OK

  7. CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY


    1. Reconnect the K64 air conditioning amplifier assembly connector.

    2. B002DTXC50
      *a

      Component with harness connected

      (Air Conditioning Amplifier Assembly)

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      K64-24 (FDEF) - K64-1 (GND) Engine switch on (IG), Windshield deicer switch on Below 2.2 V
      K64-24 (FDEF) - K64-1 (GND) Engine switch on (IG), Windshield deicer switch off 11 to 14 V
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Click here

    OK

  8. CHECK HARNESS AND CONNECTOR (NO. 2 INTEGRATION RELAY - WINDSHIELD GLASS (WINDSHIELD DEICER WIRE))


    1. Disconnect the 2B No. 2 integration relay connector.

    2. Disconnect the A5 windshield glass connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      2B-1 (DECL) - A5-2 (B2) Always Below 1 Ω
      2B-5 (DECR) - A5-1 (B) Always Below 1 Ω
      2B-1 (DECL) - Body ground Always 10 kΩ or higher
      2B-5 (DECR) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  9. CHECK HARNESS AND CONNECTOR (WINDSHIELD GLASS - BODY GROUND)


    1. B002C64C18
      *a

      Front view of wire harness connector

      (to Windshield Glass)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A5-3 (E) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  10. CHECK NO. 2 INTEGRATION RELAY


    1. Reconnect the 2B No. 2 integration relay connector.

    2. B002C64C17
      *a

      Front view of wire harness connector

      (to Windshield Glass)

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      A5-2 (B2) - Body ground Engine switch on (IG), Windshield deicer switch on 11 to 14 V
      A5-2 (B2) - Body ground Engine switch on (IG), Windshield deicer switch off Below 1 V
      A5-1 (B) - Body ground Engine switch on (IG), Windshield deicer switch on 11 to 14 V
      A5-1 (B) - Body ground Engine switch on (IG), Windshield deicer switch off Below 1 V
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE WINDSHIELD GLASS Click here

    NG

    REPLACE NO. 2 INTEGRATION RELAY Click here