WIPER AND WASHER SYSTEM, Diagnostic DTC:B1372

DTC Code DTC Name
B1372 Wiper Switch Signal Mismatch between LIN and Line

DESCRIPTION

Under normal operation, the windshield wiper motor assembly receives operation signals from the windshield wiper switch assembly via LIN communication.

The windshield wiper motor assembly and windshield wiper switch assembly are also connected via direct line in order to operate the front wipers in HI in an emergency. If the operation signals sent via LIN communication and direct line do not match, this DTC is stored.

DTC No. Detection Item DTC Detection Condition Trouble Area Memory DTC Output from
B1372 Wiper Switch Signal Mismatch between LIN and Line

    DTC Detection Condition:

  • Engine switch on (IG) (IG+ voltage 9.5 V or higher)


    Malfunction Condition:

  • LIN communication and direct line input signals do not match


    Malfunction Duration:

  • Malfunction determined if the status continues for 10 seconds or more

  • Windshield wiper motor assembly

  • Steering sensor

  • Harness or connector

  • Wiper motor wire

 ○ Windshield wiper motor assembly

WIRING DIAGRAM


  1. for LH Side:

    B000UB7E07
    B000W60E05

  2. for RH Side:

    B000UB7E05
    B000W60E05

CAUTION / NOTICE / HINT

Note

First perform the communication function inspections in How to Proceed with Troubleshooting to confirm that there are no CAN communication malfunctions before troubleshooting this problem.

Click here

PROCEDURE


  1. CHECK FOR DTC


    1. Clear the DTC.

      Click here


      Body Electrical > Wiper > Clear DTCs

    2. Turn the engine switch on (IG) and wait for at least 10 seconds.

    3. Check for DTC.

      Click here


      Body Electrical > Wiper > Trouble Codes
      OK
      DTC B1372 is not output
      Result
      Proceed to
      OK
      NG

    OK

    USE SIMULATION METHOD TO CHECK Click here

    NG

  2. READ VALUE USING GTS


    1. Read the Data List according to the display on the GTS.

      Click here


      Body Electrical > Wiper > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Wiper Switch HI (Line) Windshield wiper switch assembly HI signal (abnormal control system) input condition OFF or ON

      OFF: Windshield wiper switch assembly not in HI position

      ON: Windshield wiper switch assembly in HI position

      		 -

      Chassis > Steering Angle Sensor > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Wiper Hi Switch Windshield wiper switch assembly (HI position) condition OFF or ON

      OFF: Windshield wiper switch assembly not in HI position

      ON: Windshield wiper switch assembly in HI position

      		 -

      Body Electrical > Wiper > Data List
      Tester Display
      Wiper Switch HI (Line)

      Chassis > Steering Angle Sensor > Data List
      Tester Display
      Wiper Hi Switch
      Result
      Result Proceed to
      Only "Wiper Switch HI (Line)" changes normally A
      Only "Wiper Hi Switch" changes normally B

    A

    REPLACE STEERING SENSOR Click here

    B

  3. CHECK HARNESS AND CONNECTOR (WINDSHIELD WIPER MOTOR ASSEMBLY HI SIGNAL INPUT)


    1. B000VTLC07
      *a

      Front view of wire harness connector

      (to Wiper Motor Wire)

      Disconnect the wiper motor wire connector.

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

      Standard Voltage
      for LHD
      Tester Connection Condition Specified Condition
      Au1-2 - Body ground Engine switch on (IG), HI operating Below 1 V
      Engine switch on (IG), Windshield wiper motor assembly stopped 11 to 14 V
      for RHD
      Tester Connection Condition Specified Condition
      Au1-3 - Body ground Engine switch on (IG), HI operating Below 1 V
      Engine switch on (IG), Windshield wiper motor assembly stopped 11 to 14 V
      Result
      Proceed to
      OK
      NG

    NG

    CHECK HARNESS AND CONNECTOR (STEERING SENSOR - WIPER MOTOR WIRE) Click here

    OK

  4. INSPECT WIPER MOTOR WIRE


    1. Remove the wiper motor wire.

      Click here

    2. B000XGZC17
      *A for LHD
      *B for RHD
      *a Windshield Wiper Motor Assembly Side
      *b Wire Harness Side

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      A-2 (2S) - B-2 Always Below 1 Ω
      for RHD
      Tester Connection Condition Specified Condition
      A-3 (2S) - B-3 Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE WINDSHIELD WIPER MOTOR ASSEMBLY Click here

    NG

    REPLACE WIPER MOTOR WIRE Click here

  5. CHECK HARNESS AND CONNECTOR (STEERING SENSOR - WIPER MOTOR WIRE)


    1. Disconnect the P22*1 or P21*2 steering sensor connector.


      • *1: w/ VGRS System

      • *2: w/o VGRS System

    2. Disconnect the Au1 wiper motor wire connector.

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

      Standard Resistance
      w/ VGRS System, for LHD
      Tester Connection Condition Specified Condition
      P22-2 (2S) - Au1-2 Always Below 1 Ω
      P22-2 (2S) or Au1-2 - Body ground Always 10 kΩ or higher
      w/o VGRS System, for LHD
      Tester Connection Condition Specified Condition
      P21-2 (2S) - Au1-2 Always Below 1 Ω
      P21-2 (2S) or Au1-2 - Body ground Always 10 kΩ or higher
      w/ VGRS System, for RHD
      Tester Connection Condition Specified Condition
      P22-2 (2S) - Au1-3 Always Below 1 Ω
      P22-2 (2S) or Au1-3 - Body ground Always 10 kΩ or higher
      w/o VGRS System, for RHD
      Tester Connection Condition Specified Condition
      P21-2 (2S) - Au1-3 Always Below 1 Ω
      P21-2 (2S) or Au1-3 - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE STEERING SENSOR Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR