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

DTC Code DTC Name
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

E296776E04

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

      Power switch ON

      Active Test is not performed

      11 to 14 V

      Power switch ON

      Active Test is performed

      Below 1 V

    Result

    Proceed to

    OK

    NG
    NG

    INSPECT WASHER HEATER RELAYClick 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

    REPLACE MAIN BODY ECU

    1. for LHD

      Click here

    2. 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

    REPLACE MAIN BODY ECU

    1. for LHD

      Click here

    2. for RHD

      Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR