WINDSHIELD DEICER SYSTEM Windshield Deicer 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 DEICER relay to operate the windshield deicer.

WIRING DIAGRAM

A01EIPLE02

INSPECTION PROCEDURE

Note

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

PROCEDURE


  1. CHECK 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.

      OK
      The window defogger system operates normally.

    NG

    GO TO WINDOW DEFOGGER SYSTEM Click here

    OK

  2. INSPECT DEICER RELAY


    1. A01EJPE

      Remove the DEICER 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 - 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 DEICER RELAY

    OK

  3. CHECK HARNESS AND CONNECTOR (DEICER RELAY POWER SOURCE)


    1. A01EMPDE01
      Text in Illustration
      *1 Engine Room Relay Block
      *2 DEICER 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 DEICER relay terminal 2 - Body ground Ignition switch off Below 1 V
      Engine room relay block DEICER relay terminal 2 - Body ground Ignition switch ON 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK HARNESS AND CONNECTOR (DEICER RELAY - AIR CONDITIONING AMPLIFIER ASSEMBLY)


    1. A01ELWLE01
      Text in Illustration
      *1 Engine Room Relay Block
      *2 DEICER 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 DEICER 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

  5. CHECK HARNESS AND CONNECTOR (DEICER RELAY POWER SOURCE)


    1. A01EMPDE01
      Text in Illustration
      *1 Engine Room Relay Block
      *2 DEICER 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 DEICER relay terminal 5 - Body ground Always 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. CHECK HARNESS AND CONNECTOR (DEICER RELAY - WINDSHIELD DEICER WIRE)


    1. A01EL1XE01
      Text in Illustration
      *1 Engine Room Relay Block
      *2 DEICER Relay Terminal
      *3

      Front view of wire harness connector

      (to Windshield Deicer Wire)

      Disconnect the A3 windshield deicer wire connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A3-1 (B) - engine room relay block DEICER relay terminal 3 Always Below 1 Ω
      A3-1 (B) - Body ground Always 10 kΩ or higher
      Engine room relay block DEICER relay terminal 3 - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. A01ELYEE01
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Windshield Deicer Wire)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A3-2 (E) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE WINDSHIELD GLASS (WINDSHIELD DEICER WIRE) Click here