WINDSHIELD DEICER SYSTEM Windshield Deicer does not Operate

DESCRIPTION

When the front wiper deicer switch assembly is operated, the operation signal is transmitted to the air conditioning amplifier assembly directly. When the air conditioning amplifier assembly receives the signal, it turns on the semiconductor pwr integration ECU to operate the windshield deicer system.

WIRING DIAGRAM

B005MJWE02

CAUTION / NOTICE / HINT

Note


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

  • If the battery voltage is low, the windshield deicer system may not operate. When "Operation of Electrical Items Restricted." is not displayed on the multi-information display in the combination meter assembly, check the Data List item "Battery Control Count (Body ECU)".

    Click here

  • The seat belt warning system uses the CAN communication system. First, confirm that there are no malfunctions in the CAN communication system. Refer to How to Proceed with Troubleshooting.

    Click here

PROCEDURE


  1. CHECK AIR CONDITIONING SYSTEM


    1. Check that the air conditioning system can be operatedusing the remote touch.

      Tech Tips

      Both the windshield deicer system operation signal and airconditioning system operation signal are transmitted to the airconditioning amplifier assembly through samecommunication line.

      OK
      The air conditioning system operates normally.
      Result
      Proceed to
      OK
      NG

    NG

    GO TO AIR CONDITIONING SYSTEM Click here

    OK

  2. PERFORM ACTIVE TEST USING GTS


    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 deicer wire (windshield glass) 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 SEMICONDUCTOR POWER INTEGRATION ECU Click here

    OK

  3. REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY


    1. Replace the air conditioning amplifier assembly with anew or known good one.

      Click here

    2. Check that the windshield deicer system operatesnormally.

      OK
      The windshield deicer system operates normally.
      Result
      Proceed to
      OK
      NG

    OK

    END (AIR CONDITIONING AMPLIFIER ASSEMBLY WAS DEFECTIVE)

    NG

  4. REPLACE RADIO RECEIVER ASSEMBLY


    1. Replace the radio receiver assembly with anew or known good one.

      Click here

    2. Check that the windshield deicer system operatesnormally.

      OK
      The windshield deicer system operates normally.
      Result
      Proceed to
      OK
      NG

    OK

    END (RADIO RECEIVER ASSEMBLY WAS DEFECTIVE)

    NG

    REPLACE MULTI-DISPLAY ASSEMBLY Click here

  5. CHECK SEMICONDUCTOR POWER INTEGRATION ECU


    1. Using a voltmeter, check the signal reading of the semiconductor pwr integration ECU.

      Click here

      OK
      Output signal reading is normal.
      Result
      Proceed to
      OK
      NG

    NG

    INSPECT SEMICONDUCTOR POWER INTEGRATION ECU (RESULTS OF SIGNAL READING CHECK) Click here

    OK

  6. CHECK HARNESS AND CONNECTOR (SEMICONDUCTOR PWR INTEGRATION ECU POWER SOURCE AND BODY GROUND)


    1. Remove the semiconductor pwr integration ECU from the engine room relay block.

      Click here

      B005PZDC03
      *a

      Component without semiconductor pwr integration ECU

      (Engine Room Relay Block)

      		 - -

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      B-1 (BATT) - Body ground Always 11 to 14 V
      A-1 (ALT) - Body ground Always 11 to 14 V

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      1D-14 (GND1) - Body ground Always Below 1 Ω
      1G-5 (GND2) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  7. CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER ASSEMBLY - SEMICONDUCTOR PWR INTEGRATION ECU)


    1. Disconnect the J43 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
      J43-17 (FDEF) - 1D-6 (-S) Always Below 1 Ω
      J43-17 (FDEF) or 1D-6 (-S) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  8. CHECK SEMICONDUCTOR POWER INTEGRATION ECU


    1. Install the semiconductor pwr integration ECU.

      Click here

    2. B005LJ7C06
      *a

      Front 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 Condition Specified Condition
      J43-17 (FDEF) - Body ground Engine switch on (IG), Front wiper deicer switch off 11 to 14 V
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE SEMICONDUCTOR POWER INTEGRATION ECU Click here

    OK

  9. CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY


    1. Reconnect the J43 air conditioning amplifier assembly connector.

    2. B005LNYC07
      *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 Condition Specified Condition
      J43-17 (FDEF) - J43-4 (GND) Engine switch on (IG), Front wiper deicer switch on Below 2.2 V
      J43-17 (FDEF) - J43-4 (GND) Engine switch on (IG), Front wiper deicer switch off 11 to 14 V
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Click here

    OK

  10. CHECK HARNESS AND CONNECTOR (SEMICONDUCTOR PWR INTEGRATION ECU - WINDSHIELD DEICER WIRE (WINDSHIELD GLASS))


    1. Disconnect the 1E semiconductor pwr integration ECU connector.

    2. Disconnect the aA1 windshield deicer wire (windshield glass) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      1E-8 (L) - aA1-1 Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  11. CHECK SEMICONDUCTOR POWER INTEGRATION ECU


    1. Reconnect the 1E semiconductor pwr integration ECU connector.

    2. B005NA9C02
      *a

      Front view of wire harness connector

      (to Windshield Deicer Wire (Windshield Glass))

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      aA1-1 - Body ground Engine switch on (IG), Front wiper deicer switch off Below 1 V
      aA1-1 - Body ground Engine switch on (IG), Front wiper deicer switch on 11 to 14 V
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE SEMICONDUCTOR POWER INTEGRATION ECU Click here

    OK

  12. CHECK HARNESS AND CONNECTOR (WINDSHIELD DEICER WIRE (WINDSHIELD GLASS) - BODY GROUND)


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

      Standard Resistance
      Tester Connection Condition Specified Condition
      aA1-2 - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE WINDSHIELD DEICER WIRE (WINDSHIELD GLASS) Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR