WIPER AND WASHER SYSTEM(w/ Rain Sensor) Washer Nozzle Heater Circuit

DESCRIPTION

The main body ECU receives ambient air temperature information from the air conditioning amplifier assembly via CAN communication. The washer nozzle heater assembly controls the main body ECU and operates the washer nozzle heater assembly according to the ambient temperature.

WIRING DIAGRAM

A01QOC3E04

CAUTION / NOTICE / HINT

Note

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

PROCEDURE


  1. CHECK MAIN BODY ECU


    1. Using the GTS, enter the following menus: Body / Main Body / Active Test.

    2. Select "Front Washer Nozzle Heater", and perform the Active Test.

      Click here


      Body Electrical > Main Body > Active Test
      Tester Display Measurement Item Control Range Diagnostic Note
      Washer Nozzle Heater Washer nozzle heater operation ON/OFF -

      Body Electrical > Main Body > Active Test
      Tester Display
      Washer Nozzle Heater

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      G79-20 (WHTR) - Body ground

      Ignition switch ON

      Active Test is not performed

      		 11 to 14 V

      Ignition switch ON

      Active Test is performed

      		 Below 1 V
      Result
      Proceed to
      OK
      NG

    NG

    INSPECT WASHER HEATER RELAY Click here

    OK

  2. INSPECT WASHER NOZZLE SUB-ASSEMBLY


    1. Remove the washer nozzle sub-assembly.

      Click here

    2. Inspect the washer nozzle sub-assembly.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE WASHER NOZZLE SUB-ASSEMBLY

    OK

  3. CHECK HARNESS AND CONNECTOR (WASHER NOZZLE - WASHER HEATER RELAY AND BODY GROUND)


    1. Disconnect the A96 washer nozzle sub-assembly connector.

    2. Remove the washer heater relay.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A96-2 (B) - WASHER HEATER RELAY 3 Always Below 1 Ω
      A96-1 (E) - Body ground Always Below 1 Ω
      A96-2 (B) or WASHER HEATER RELAY 3 - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. INSPECT WASHER HEATER RELAY


    1. Inspect the washer heater relay.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE WASHER HEATER RELAY

    OK

  5. CHECK HARNESS AND CONNECTOR (WASHER HEATER RELAY - BATTERY)


    1. Remove the washer heater relay.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      WASHER HEATER RELAY 5 - Body ground Ignition switch ON 11 to 14 V
      Ignition switch off Below 1 V
      Result
      Proceed to
      OK
      NG

    OK

    for LHD Click here for RHD Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  6. INSPECT WASHER HEATER RELAY


    1. Inspect the washer heater relay.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE WASHER HEATER RELAY

    OK

  7. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - WASHER HEATER RELAY)


    1. Disconnect the G79 main body ECU connector.

    2. Remove the washer heater relay.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G79-20 (WHTR) - WASHER HEATER RELAY 2 Always Below 1 Ω
      G79-20 (WHTR) or WASHER HEATER RELAY 2 - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  8. CHECK HARNESS AND CONNECTOR (WASHER HEATER RELAY - BATTERY)


    1. Remove the washer heater relay.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      WASHER HEATER RELAY 1 - Body ground Ignition switch ON 11 to 14 V
      Ignition switch off Below 1 V
      WASHER HEATER RELAY 5 - Body ground Ignition switch ON 11 to 14 V
      Ignition switch off Below 1 V
      Result
      Proceed to
      OK
      NG

    OK

    for LHD Click here for RHD Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR