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Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Communication Devices >> CXPI Communication System - Diagnostic Codes >> CXPI Communication System >> DTC B2355-87: Power Distribution Box Missing Message; DTC B2357-87: Wiper Module Missing Message [11/2023 - ] >> Procedure

DTC B2355-87: Power Distribution Box Missing Message; DTC B2357-87: Wiper Module Missing Message [11/2023 - ]: Procedure

  1. CLEAR DTC 
    1. Clear the DTCs.

      Body Electrical > Main Body > Clear DTCs 

      Result

      Result
      NEXT

    Result: 

    NEXT 

    See step  2

  2. CHECK FOR DTC 
    1. Check for DTCs.

      Body Electrical > Main Body > Trouble Codes 

      Result

      Result Proceed to
      B2355-87 and B2357-87 are output A
      DTC B2355-87 is output B
      DTC B2357-87 is output C
      DTC is not output D

    Result: 

    B 

    See step  9

    Result: 

    C 

    See step  10

    Result: 

    D 

    USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [12/2019 - ] 

    Result: 

    A 

    See step  3

  3. CLEAR DTC 
    1. Disconnect the A7 windshield wiper relay assembly connector.
    2. Clear the DTCs.

      Body Electrical > Main Body > Clear DTCs 

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  4

  4. CHECK WINDSHIELD WIPER RELAY ASSEMBLY 
    1. Check for DTCs.

      Body Electrical > Main Body > Trouble Codes 

      Result

      Result Proceed to
      B2355-87 and B2357-87 are output A
      Only B2357-87 is output B

    Result: 

    B 

    REPLACE WINDSHIELD WIPER RELAY ASSEMBLY. Refer to  REMOVAL [11/2023 - ] 

    Result: 

    A 

    See step  5

  5. CHECK HARNESS AND CONNECTOR (POWER DISTRIBUTION BOX ASSEMBLY - EACH ECU) 
    1. Disconnect the cable from the negative (-) auxiliary battery terminal.
    2. Disconnect the 8E power distribution box assembly connector.
    3. Disconnect the A7 windshield wiper relay assembly connector.
    4. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      8E-5 - Body ground Cable disconnected from negative (-) auxiliary battery terminal 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  6

  6. INSPECT POWER DISTRIBUTION BOX ASSEMBLY 
    1. Remove the power distribution box assembly.

      Refer to REMOVAL [11/2023 - ]

    2. Remove the main body ECU (multiplex network body ECU) from the power distribution box assembly.
    3. Measure the resistance according to the value(s) in the table below.
      GTY1178170Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component without harness connected
      (Power Distribution Box Assembly)      		 - -
      STANDARD RESISTANCE

      Tester Connection Condition Specified Condition
      MB-22 (CXP1) - 8E-5 Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE POWER DISTRIBUTION BOX ASSEMBLY. Refer to  REMOVAL [11/2023 - ] 

    Result: 

    OK 

    See step  7

  7. CLEAR DTC 
    1. Replace the power distribution box assembly with a new or known good one.

      Refer to REMOVAL [11/2023 - ]

    2. Reconnect the all connectors.
    3. Clear the DTCs.

      Body Electrical > Main Body > Clear DTCs 

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  8

  8. CHECK POWER DISTRIBUTION BOX ASSEMBLY 
    1. Check for DTCs.

      Body Electrical > Main Body > Trouble Codes 

      Result

      Result Proceed to
      B2355-87 and B2357-87 are output A
      DTCs are not output B

    Result: 

    A 

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to  REMOVAL [11/2023 - ] 

    Result: 

    B 

    END (POWER DISTRIBUTION BOX ASSEMBLY WAS DEFECTIVE) 

  9. CHECK HARNESS AND CONNECTOR (POWER DISTRIBUTION BOX ASSEMBLY - POWER SOURCE AND BODY GROUND) 
    1. Disconnect the 8B, 8C or 8J power distribution box assembly connector.
    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      8J-1 - Body ground Always 11 to 14 V
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      8C-41 - Body ground Always Below 1 Ω
      8B-36 - Body ground Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE POWER DISTRIBUTION BOX ASSEMBLY. Refer to  REMOVAL [11/2023 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  10. CHECK HARNESS AND CONNECTOR (WINDSHIELD WIPER RELAY ASSEMBLY - POWER SOURCE AND BODY GROUND) 
    1. Disconnect the A6 windshield wiper relay assembly connector.
    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      A6-6 (IGWS) - Body ground Ignition switch ON 11 to 14 V
      A6-8 (+B) - Body ground Ignition switch ON or less than approximately 60 seconds after ignition switch turned off 11 to 14 V
      Approximately 60 seconds or more after ignition switch turned off
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      A6-3 (E) - Body ground Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  11

  11. CHECK HARNESS AND CONNECTOR (WINDSHIELD WIPER RELAY ASSEMBLY - POWER DISTRIBUTION BOX ASSEMBLY) 
    1. Turn the ignition switch off.
    2. Disconnect the cable from the negative (-) auxiliary battery terminal.
    3. Disconnect the A7 windshield wiper relay assembly connector.
    4. Disconnect the 8E power distribution box assembly connector.
    5. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      A7-4 (MPX1) - 8E-5 Cable disconnected from negative (-) auxiliary battery terminal Below 1 Ω
      A7-4 (MPX1) or 8E-5 - Body ground Cable disconnected from negative (-) auxiliary battery terminal 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE WINDSHIELD WIPER RELAY ASSEMBLY. Refer to  REMOVAL [11/2023 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

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