WIPER AND WASHER SYSTEM Washer Nozzle Heater Circuit

DESCRIPTION

The No. 2 main body ECU receives ambient air temperature information from the air conditioning amplifier assembly via CAN communication.

The washer nozzle heater assembly controls the No. 2 main body ECU and operates the washer nozzle heater assembly according to the ambient temperature.

WIRING DIAGRAM

A01EP67E02

INSPECTION PROCEDURE

Note


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

  • Since the wiper and washer system has functions that use CAN communication, first confirm that there is no malfunction in the CAN communication system with the How to Proceed with Troubleshooting procedure Click here.

  • Since the wiper and washer system has functions that use the air conditioning system, first confirm that there is no malfunction in the air conditioning system with the How to Proceed with Troubleshooting procedure Click here.

PROCEDURE


  1. CHECK NO. 2 MAIN BODY ECU


    1. A01EO4CE78

      Using the intelligent tester, enter the following menus: Body / Body No. 4 / Active Test.

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

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      L33-25 (WHTR) - Body ground

      • Engine switch on (IG)

      • Active Test is not performed

      		 11 to 14 V
      L33-25 (WHTR) - Body ground

      • Engine switch on (IG)

      • Active Test is performed

      		 Below 1 V

    NG

    CHECK HARNESS AND CONNECTOR (NO. 2 MAIN BODY ECU - COWL SIDE JUNCTION BLOCK RH) Click here

    OK

  2. INSPECT WASHER NOZZLE HEATER ASSEMBLY


    1. for LH:


      1. Remove the washer nozzle heater assembly LH Click here.

      2. Inspect the washer nozzle heater assembly LH Click here.

    2. for RH:


      1. Remove the washer nozzle heater assembly RH Click here.

      2. Inspect the washer nozzle heater assembly RH Click here.

      Result
      Result Proceed to
      OK A
      NG (for LH) B
      NG (for RH) C

    B

    REPLACE WASHER NOZZLE HEATER ASSEMBLY LH Click here

    C

    REPLACE WASHER NOZZLE HEATER ASSEMBLY RH Click here

    A

  3. CHECK HARNESS AND CONNECTOR (WASHER NOZZLE HEATER ASSEMBLY - COWL SIDE JUNCTION BLOCK RH AND BODY GROUND)


    1. Disconnect the Q2 washer nozzle heater assembly LH connector.

      A01EOG9E02

    2. Disconnect the Q1 washer nozzle heater assembly RH connector.

    3. Disconnect the 3C cowl side junction block RH connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      Q2-2 (L+) - 3C-2 Always Below 1 Ω
      Q1-2 (R+) - 3C-2 Always Below 1 Ω
      Q2-1 (L-) - Body ground Always Below 1 Ω
      Q1-1 (R-) - Body ground Always Below 1 Ω
      Q2-2 (L+) or 3C-2 - Body ground Always 10 kΩ or higher
      Q1-2 (R+) or 3C-2 - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK HARNESS AND CONNECTOR (COWL SIDE JUNCTION BLOCK RH - BATTERY)


    1. A01ESL6E01

      Disconnect the 3B cowl side junction block RH connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      3B-5 - Body ground Engine switch on (IG) 11 to 14 V
      3B-5 - Body ground Engine switch off Below 1 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. CHECK COWL SIDE JUNCTION BLOCK RH


    1. A01ERVOE01

      Remove the cowl side junction block RH.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      3B-5 - 3C-2 Battery voltage applied between terminals 3C-16 and 3B-11 Below 1 Ω
      3B-5 - 3C-2 Battery voltage not applied between terminals 3C-16 and 3B-11 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE NO. 2 MAIN BODY ECU Click here

  6. CHECK HARNESS AND CONNECTOR (NO. 2 MAIN BODY ECU - COWL SIDE JUNCTION BLOCK RH)


    1. A01EOXIE02

      Disconnect the L33 No. 2 main body ECU connector.

    2. Disconnect the 3B cowl side junction block RH connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      L33-25 (WHTR) - 3B-11 Always Below 1 Ω
      L33-25 (WHTR) or 3B-11 - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  7. CHECK HARNESS AND CONNECTOR (COWL SIDE JUNCTION BLOCK RH - BATTERY)


    1. A01ES09E01

      Disconnect the 3C cowl side junction block RH connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      3C-16 - Body ground Engine switch on (IG) 11 to 14 V
      3C-16 - Body ground Engine switch off Below 1 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  8. INSPECT COWL SIDE JUNCTION BLOCK RH


    1. A01ERVOE01

      Remove the cowl side junction block RH.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      3B-5 - 3C-2 Battery voltage applied between terminals 3C-16 and 3B-11 Below 1 Ω
      3B-5 - 3C-2 Battery voltage not applied between terminals 3C-16 and 3B-11 10 kΩ or higher

    NG

    REPLACE COWL SIDE JUNCTION BLOCK RH

    OK

    REPLACE NO. 2 MAIN BODY ECU Click here