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DTC B1210: Power ECU Stop: Procedure

  1. INSPECT FUSE (AM2) 
    1. Remove the AM2 fuse from the cowl side J/B RH.
    2. Measure the resistance of the fuse.

      Standard resistance

      Below 1 Ω

    NG → REPLACE FUSE 

    OK: Go to next step 

  2. CHECK WIRE HARNESS (POWER SOURCE CONTROL ECU - BATTERY AND BODY GROUND) 
    1. Disconnect the J55 ECU connector.
      GTY119821Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance and voltage of the wire harness side connector.

      Standard voltage

      Tester Connection Condition Specified Condition
      J55-33 (AM1) - Body ground Always 10 to 14 V
      J55-12 (AM2) - Body ground Always 10 to 14 V

      Standard resistance

      Tester Connection Specified Condition
      J55-6 (GND2) - Body ground Below 1 Ω

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  3. CHECK RESISTANCE OF COMMUNICATION LINE 
    1. Disconnect the J55, J26 and 2F ECU connectors.
      GTY119675Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance between the specified terminals on the wire harness side connectors.

      Standard resistance

      Tester Connection Specified Condition
      MPX1 (J55-7) - MPX2 (J26-7) Below 1 Ω
      MPX2 (J55-24) - 2F-5 Below 1 Ω

      Result

      Result Proceed to
      Both are OK A
      One is OK B
      Both are NG C

    B → REPLACE POWER SOURCE CONTROL ECU AND REPAIR OR REPLACE HARNESS OR CONNECTOR 

    C → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    A → REPLACE POWER SOURCE CONTROL ECU 

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