WIPER AND WASHER SYSTEM 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 sub-assembly controls the main body ECU and operates the washer nozzle heater sub-assembly according to the ambient temperature.

WIRING DIAGRAM

A0029HHE01

CAUTION / NOTICE / HINT

Note


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

  • If the main body ECU (multiplex network body ECU) is replaced, refer to Service Bulletin.*


    • *: w/ Smart Entry and Start System

  • As the door control battery is installed between the vehicle battery and main body ECU (multiplex network body ECU), first perform the inspections in On-Vehicle Inspection to confirm that there are no malfunctions in the power source circuit for the main body ECU (multiplex network body ECU) before performing this troubleshooting procedure.*

    Click here

PROCEDURE


  1. PERFORM ACTIVE TEST USING GTS


    1. Disconnect the A36 washer nozzle sub-wire connector.

    2. Connect the GTS to the DLC3.

    3. Turn the ignition switch to ON.

    4. Turn the GTS on.

    5. Enter the following menus: Body Electrical / Main Body / Active Test.

    6. Perform the Active Test according to the display on the GTS.


      Body Electrical > Main Body > Active Test
      Tester Display Measurement Item Control Range Diagnostic Note
      Washer Nozzle Heater Operate the washer nozzle heater sub-assembly OFF or ON -

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

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      A36-2 (B) - Body ground Ignition switch on, Active Test is not performed Below 1 V
      Ignition switch on, Active Test is performed 11 to 14 V
      Result
      Proceed to
      OK
      NG

    NG

    INSPECT WSH NZL HTR RELAY Click here

    OK

  2. CHECK HARNESS AND CONNECTOR (WASHER NOZZLE SUB-WIRE - BODY GROUND)


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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A36-1 (E) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. 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

    OK

    USE SIMULATION METHOD TO CHECK Click here

    NG

    REPLACE WASHER NOZZLE SUB-ASSEMBLY Click here

  4. INSPECT WSH NZL HTR RELAY


    1. Inspect the WSH NZL HTR relay.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE WSH NZL HTR RELAY

    OK

  5. CHECK HARNESS AND CONNECTOR (POWER SOURCE - WSH NZL HTR RELAY)


    1. Disconnect the 2C instrument junction block assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      2C-14 - 5 (WSH NZL HTR relay) Always Below 1 Ω
      2C-14 - 2 (WSH NZL HTR relay) Always Below 1 Ω
      2C-14 or 5 (WSH NZL HTR relay) - Body ground Always 10 kΩ or higher
      2C-14 or 2 (WSH NZL HTR relay) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) - WSH NZL HTR RELAY)


    1. Disconnect the J9 main body ECU (multiplex network body ECU) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      J9-6 (WHTR) - 1 (WSH NZL HTR relay) Always Below 1 Ω
      J9-6 (WHTR) or 1 (WSH NZL HTR relay) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  7. CHECK HARNESS AND CONNECTOR (WASHER NOZZLE SUB-ASSEMBLY - WSH NZL HTR RELAY)


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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A36-2 (B) - 3 (WSH NZL HTR relay) Always Below 1 Ω
      A36-2 (B) or 3 (WSH NZL HTR relay) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR