WIPER AND WASHER SYSTEM, Diagnostic DTC:B1375

DTC Code DTC Name
B1375 Lost Communication with Wiper Sub Motor Assembly

DESCRIPTION

DTC No. Detection Item DTC Detection Condition Trouble Area Memory DTC Output from
B1375 Lost Communication with Wiper Sub Motor Assembly

    DTC Detection Condition:

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


    Malfunction Condition:

  • Communication between the windshield wiper motor assembly and the No. 2 windshield wiper motor assembly is malfunctioning or lost


    Malfunction Duration:

  • Malfunction determined if state continues for 10 seconds or more after power switch is on (IG) for 10 seconds

  • Harness or connector

  • Wiper motor wire

  • Windshield wiper motor assembly

  • No. 2 windshield wiper motor assembly

  • Windshield wiper switch relay (WIPER NO.2)

 ○ Windshield wiper motor assembly

WIRING DIAGRAM

B0049S6E04

CAUTION / NOTICE / HINT

Note


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

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

PROCEDURE


  1. CHECK FOR DTC


    1. Clear the DTCs.

      Click here


      Body Electrical > Wiper > Clear DTCs

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

    3. Check for DTCs.

      Click here


      Body Electrical > Wiper > Trouble Codes
      OK
      DTC B1375 is not output
      Result
      Proceed to
      OK
      NG

    OK

    USE SIMULATION METHOD TO CHECK Click here

    NG

  2. CHECK HARNESS AND CONNECTOR (NO. 2 WINDSHIELD WIPER MOTOR ASSEMBLY - BATTERY)


    1. B004C83C14
      *A for LHD
      *B for RHD
      *a

      Front view of wire harness connector

      (to No. 2 Windshield Wiper Motor Assembly)

      Disconnect the No. 2 windshield wiper motor assembly connector.

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

      Standard Voltage
      for LHD
      Tester Connection Switch Condition Specified Condition
      A44-4 (+B) - Body ground Power switch on (IG) or within approximately 60 seconds of power switch being turned off 11 to 14 V
      Approximately 60 seconds have elapsed after power switch is turned off Below 1 V
      for RHD
      Tester Connection Switch Condition Specified Condition
      A44-1 (+B) - Body ground Power switch on (IG) or within approximately 60 seconds of power switch being turned off 11 to 14 V
      Approximately 60 seconds have elapsed after power switch is turned off Below 1 V
      Result
      Proceed to
      OK
      NG

    NG

    INSPECT WINDSHIELD WIPER SWITCH RELAY (WIPER NO.2) Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (NO. 2 WINDSHIELD WIPER MOTOR ASSEMBLY - BODY GROUND)


    1. B004C83C13
      *A for LHD
      *B for RHD
      *a

      Front view of wire harness connector

      (to No. 2 Windshield Wiper Motor Assembly)

      Disconnect the No. 2 windshield wiper motor assembly connector.

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      A44-1 (GND) - Body ground Always Below 1 Ω
      for RHD
      Tester Connection Condition Specified Condition
      A44-4 (GND) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK NO. 2 WINDSHIELD WIPER MOTOR ASSEMBLY


    1. B004C83C08
      *A for LHD
      *B for RHD
      *a

      Front view of wire harness connector

      (to No. 2 Windshield Wiper Motor Assembly)

      Disconnect the No. 2 windshield wiper motor assembly connector.

    2. Connect an oscilloscope to the rain sensor connector.

    3. Check for pulses.

      OK
      for LHD
      Tester Connection Switch Condition Specified Condition
      A44-2 (LIN) - Body ground Power switch on (IG) Pulse generation
      for RHD
      Tester Connection Switch Condition Specified Condition
      A44-3 (LIN) - Body ground Power switch on (IG) Pulse generation
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE NO. 2 WINDSHIELD WIPER MOTOR ASSEMBLY Click here

    OK

  5. INSPECT WIPER MOTOR WIRE


    1. Remove the wiper motor wire.

      Click here

    2. B004AY6C11
      *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-5 (LLIN) - B-5 Always Below 1 Ω
      for RHD
      Tester Connection Condition Specified Condition
      A-8 (LLIN) - B-8 Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE WIPER MOTOR WIRE Click here

    OK

  6. CHECK HARNESS AND CONNECTOR (NO. 2 WINDSHIELD WIPER MOTOR ASSEMBLY - WIPER MOTOR WIRE)


    1. Disconnect the A44 No. 2 windshield wiper motor assembly connector.

    2. Disconnect the Au1 wiper motor wire connector.

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      A44-2 (LIN) - Au1-5 Always Below 1 Ω
      A44-2 (LIN) or Au1-5 - Body ground Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      A44-3 (LIN) - Au1-8 Always Below 1 Ω
      A44-3 (LIN) or Au1-8 - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE NO. 2 WINDSHIELD WIPER MOTOR ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  7. INSPECT WINDSHIELD WIPER SWITCH RELAY (WIPER NO.2)


    1. Remove the windshield wiper switch relay (WIPER NO.2) form engine room relay block.

    2. Inspect the windshield wiper switch relay (WIPER NO.2).

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE WINDSHIELD WIPER SWITCH RELAY (WIPER NO.2)

    OK

  8. CHECK HARNESS AND CONNECTOR (WINDSHIELD WIPER SWITCH RELAY [WIPER NO.2] - BATTERY AND BODY GROUND)


    1. B004ABZC01
      *a

      Front view of wire harness connector

      (to Windshield Wiper Switch Relay [WIPER NO.2])

      Remove the windshield wiper switch relay (WIPER NO.2) form engine room relay block.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      Windshield wiper switch relay (WIPER NO.2) terminal 2 - Body ground Always Below 1 Ω

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      Windshield wiper switch relay (WIPER NO.2) terminal 5 - Body ground Power switch off 11 to 14 V
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  9. CHECK HARNESS AND CONNECTOR (WINDSHIELD WIPER SWITCH RELAY [WIPER NO.2] - MAIN BODY ECU [MULTIPLEX NETWORK BODY ECU] AND NO. 2 WINDSHIELD WIPER MOTOR ASSEMBLY)


    1. Remove the windshield wiper switch relay (WIPER NO.2) form engine room relay block.

    2. Disconnect the P7 main body ECU (multiplex network body ECU) connector.

    3. Disconnect the A44 No. 2 windshield wiper motor assembly connector.

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      P7-22 (WPS2) - windshield wiper switch relay (WIPER NO.2) terminal 1 Always Below 1 Ω
      Windshield wiper switch relay (WIPER NO.2) terminal 3 - A44-4 (+B) Always Below 1 Ω
      P7-22 (WPS2) or windshield wiper switch relay (WIPER NO.2) terminal 1 - Body ground Always 10 kΩ or higher
      Windshield wiper switch relay (WIPER NO.2) terminal 3 or A44-4 (+B) - Body ground Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      P7-22 (WPS2) - windshield wiper switch relay (WIPER NO.2) terminal 1 Always Below 1 Ω
      Windshield wiper switch relay (WIPER NO.2) terminal 3 - A44-1 (+B) Always Below 1 Ω
      P7-22 (WPS2) or windshield wiper switch relay (WIPER NO.2) terminal 1 - Body ground Always 10 kΩ or higher
      Windshield wiper switch relay (WIPER NO.2) terminal 3 or A44-1 (+B) - 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