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 front wiper motor and link assembly receives operation signals from the windshield wiper switch assembly via LIN communication.

The front wiper motor and link 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 When the battery voltage is 9.5 V or more, the operation signals sent via LIN communication and direct line do not match for 10 seconds or more.

  • Front wiper motor and link assembly

  • Windshield wiper switch assembly

  • Harness or connector

 ○ Front wiper motor and link assembly

WIRING DIAGRAM


  1. for Wiper Switch RH Side Type:

    B005QFVE03

  2. for Wiper Switch LH Side Type:

    B005QFVE04

PROCEDURE


  1. READ VALUE USING GTS


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Wiper / Data List.

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


      Body Electrical > Wiper > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Wiper Switch LO Front wiper switch LO position signal ON or OFF

      ON: Front wiper switch in LO position

      OFF: Front wiper switch not in LO position

      		 -
      Wiper Switch HI Front wiper switch HI position signal ON or OFF

      ON: Front wiper switch in HI position

      OFF: Front wiper switch not in HI position

      		 -
      Wiper Switch AUTO Front wiper switch AUTO position signal*1 ON or OFF

      ON: Front wiper switch in AUTO position

      OFF: Front wiper switch not in AUTO position

      		 The AUTO position of the front wiper switch can be changed between AUTO and INT operation using a customize setting
      Wiper Switch MIST Front wiper switch MIST position signal ON or OFF

      ON: Front wiper switch in MIST position

      OFF: Front wiper switch not in MIST position

      		 -
      Wiper Switch INT Front wiper switch INT position signal*2 ON or OFF

      ON: Front wiper switch in INT position

      OFF: Front wiper switch not in INT position

      		 -
      Wiper Switch HI (Line) Front wiper switch HI position signal ON or OFF

      ON: Front wiper switch in HI position

      OFF: Front wiper switch not in HI position

      		 -

      • *1: w/ Auto Wiper System

      • *2: w/o Auto Wiper System


      Body Electrical > Wiper > Data List
      Tester Display
      Wiper Switch LO
      Wiper Switch HI
      Wiper Switch AUTO
      Wiper Switch MIST
      Wiper Switch INT
      Wiper Switch HI (Line)
      Result
      Result Proceed to
      Data List item "Wiper Switch HI (Line)" only is always ON. A
      Data List item "Wiper Switch HI (Line)" only is always OFF.
      Data List item "Wiper Switch HI (Line)" changes correctly according to the front wiper switch operation, but other Data List items do not change correctly. B
      All of the Data List items change according to the front wiper switch operation. C

    B

    CHECK HARNESS AND CONNECTOR (FRONT WIPER MOTOR AND LINK ASSEMBLY - WINDSHIELD WIPER SWITCH ASSEMBLY) Click here

    C

    USE SIMULATION METHOD TO CHECK Click here

    A

  2. CHECK HARNESS AND CONNECTOR (FRONT WIPER MOTOR AND LINK ASSEMBLY - WINDSHIELD WIPER SWITCH ASSEMBLY)


    1. Disconnect the J31 windshield wiper switch assembly connector.

    2. Disconnect the i1 front wiper motor and link assembly connector.

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

      Standard Resistance
      for Wiper Switch RH Side Type
      Tester Connection Condition Specified Condition
      J31-9 (2S) - i1-1 (2S) Always Below 1 Ω
      J31-9 (2S) or i1-1 (2S) - Body ground Always 10 kΩ Higher
      for Wiper Switch LH Side Type
      Tester Connection Condition Specified Condition
      J31-6 (2S) - i1-1 (2S) Always Below 1 Ω
      J31-6 (2S) or i1-1 (2S) - Body ground Always 10 kΩ Higher
      Result
      Proceed to
      OK
      NG

    OK

    GO TO STEP 5 Click here

    NG

  3. CHECK WIPER MOTOR WIRE


    1. Remove the wiper motor wire.

      Click here

    2. B005NKXC26
      *a

      Front view of wire harness connector

      (to Front Wiper Motor and Link Assembly)
      *b

      Front view of wire harness connector

      (to Wire Harness)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      i1-1 (2S) - iA1-4 Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    NG

    REPLACE WIPER MOTOR WIRE Click here

  4. CHECK HARNESS AND CONNECTOR (FRONT WIPER MOTOR AND LINK ASSEMBLY - WINDSHIELD WIPER SWITCH ASSEMBLY)


    1. Disconnect the J31 windshield wiper switch assembly connector.

    2. Disconnect the i1 front wiper motor and link assembly connector.

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

      Standard Resistance
      for Wiper Switch RH Side Type
      Tester Connection Condition Specified Condition
      J31-7 (MPX1) - i1-2 (MPX1) Always Below 1 Ω
      J31-7 (MPX1) or i1-2 (MPX1) - Body ground Always 10 kΩ Higher
      for Wiper Switch LH Side Type
      Tester Connection Condition Specified Condition
      J31-8 (MPX1) - i1-2 (MPX1) Always Below 1 Ω
      J31-8 (MPX1) or i1-2 (MPX1) - Body ground Always 10 kΩ Higher
      Result
      Proceed to
      OK
      NG

    NG

    CHECK WIPER MOTOR WIRE Click here

    OK

  5. REPLACE WINDSHIELD WIPER SWITCH ASSEMBLY


    1. Replace the windshield wiper switch assembly with a new or known good one.

      Click here

    2. Turn the engine switch on (IG).

    3. Check for DTCs.

      Click here


      Body Electrical > Wiper > Trouble Codes
      Result
      Result Proceed to
      DTC B1372 is not output. A
      DTC B1372 is output. B

    A

    END

    B

    REPLACE FRONT WIPER MOTOR AND LINK ASSEMBLY Click here

  6. CHECK WIPER MOTOR WIRE


    1. Remove the wiper motor wire.

      Click here

    2. B005NKXC27
      *a

      Front view of wire harness connector

      (to Front Wiper Motor and Link Assembly)
      *b

      Front view of wire harness connector

      (to Wire Harness)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      i1-2 (MPX1) - iA1-1 Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    NG

    REPLACE WIPER MOTOR WIRE Click here