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 sub-assembly controls the main body ECU and operates the washer nozzle sub-assembly according to the ambient temperature.

WIRING DIAGRAM

B0085QCE02

CAUTION / NOTICE / HINT

Note


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

  • The vehicle battery supplies power to the main body ECU (multiplex network body ECU) via the door control battery. Therefore, before performing this troubleshooting procedure, make sure to perform an on-vehicle inspection to confirm that the main body ECU (multiplex network body ECU) power source circuit is normal.*1

    Click here

  • Before replacing the main body ECU (multiplex network body ECU), refer to Service Bulletin.*2


    • *1: w/ Door Control Battery

    • *2: w/ Smart Entry and Start System

PROCEDURE


  1. PERFORM ACTIVE TEST USING GTS


    1. Disconnect the fA1 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 Function to operate the nozzle heater 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 Condition Specified Condition
      fA1-2 (B) - Body ground Active Test not being performed Below 1 V
      Active Test being 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
      fA1-1 (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

    NG

    REPLACE WASHER NOZZLE SUB-ASSEMBLY Click here

    OK

  4. INSPECT WASHER NOZZLE SUB-WIRE


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

      Standard Resistance
      Tester Connection Condition Specified Condition
      fA1-2 (B) - f2-2 Always Below 1 Ω
      fA1-2 (B) - f1-2 Always Below 1 Ω
      fA1-2 (B), f2-2 or f1-2 - Body ground Always 10 kΩ or higher
      fA1-1 (E) - f2-1 Always Below 1 Ω
      fA1-1 (E) - f1-1 Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

    NG

    REPLACE WASHER NOZZLE SUB-WIRE

  5. 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

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


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

      Standard Voltage
      Tester Connection Condition Specified Condition
      5 (WSH NZL HTR relay) - Body ground Always 11 to 14 V
      2 (WSH NZL HTR relay) - Body ground Ignition switch ON 11 to 14 V
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. Disconnect the K51 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
      1 (WSH NZL HTR relay) - K51-13 (WHTR) Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  8. CHECK HARNESS AND CONNECTOR (WSH NZL HTR RELAY - WASHER NOZZLE SUB-WIRE)


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

      Standard Resistance
      Tester Connection Condition Specified Condition
      3 (WSH NZL HTR relay) - fA1-2 (B) Always Below 1 Ω
      3 (WSH NZL HTR relay) or fA1-2 (B) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR