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Home >> Toyota >> 2018 >> Prius Four >> Repair and Diagnosis >> Hybrid/Electric Powertrain >> Testing and Diagnosis >> Hybrid Control System (Nickel Metal Hydride) - Diagnostic Codes (3 Of 9) >> HYBRID CONTROL SYSTEM (for NICKEL METAL HYDRIDE BATTERY) >> DTC P0ADD-11: Hybrid/EV Battery Negative Contactor Circuit Short to Ground [11/2015 - 12/2018] >> Procedure

DTC P0ADD-11: Hybrid/EV Battery Negative Contactor Circuit Short to Ground [11/2015 - 12/2018]: Procedure

  1. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - BODY GROUND) 
    1. Disconnect the F2 hybrid vehicle control ECU connector.
    2. Measure the resistance according to the value(s) in the table below.
      GTY579855Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Hybrid Vehicle Control ECU)

      Standard Resistance

      (F2)

      (F2)

      Tester Connection Condition Specified Condition
      F2-13 (SMRG) - Body ground Power switch off 20.6 to 40.8 Ω
    3. Reconnect the F2 hybrid vehicle control ECU connector.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE HYBRID VEHICLE CONTROL ECU. Refer to  REMOVAL [11/2015 - 12/2018] 

    Result: 

    NG 

    See step  2

  2. CHECK CONNECTOR CONNECTION CONDITION (FLOOR WIRE CONNECTOR) 

    Refer to PROCEDURE - Step 5

    Result

    Result Proceed to
    OK A
    NG (The connector is not connected securely.) B
    NG (The terminals are not making secure contact or are deformed, or water or foreign matter exists in the connector.) C

    Result: 

    B 

    CONNECT SECURELY 

    Result: 

    C 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    A 

    See step  3

  3. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - HV BATTERY JUNCTION BLOCK ASSEMBLY) 
    WARNING:

    Be sure to wear insulated gloves.

    1. Check that the service plug grip is not installed.
      NOTE:

      After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the service information because this may cause a malfunction.

    2. Remove the No. 1 HV battery cover panel RH.

      Refer to PROCEDURE - Step 29

    3. Disconnect the M37 HV battery junction block assembly connector.
      GTY538464Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Disconnect the F2 hybrid vehicle control ECU connector.
    5. Measure the resistance according to the value(s) in the table below.
      GTY587816Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Hybrid Vehicle Control ECU)
      *b Front view of wire harness connector
      (to HV Battery Junction Block Assembly)

      Standard Resistance

      (F2, M37)

      (F2)

      (M37)

      Tester Connection Condition Specified Condition
      F2-13 (SMRG) or M37-4 (SMRG) - Body ground and other terminals Power switch off 10 kΩ or higher
    6. Reconnect the F2 hybrid vehicle control ECU connector.
    7. Reconnect the M37 HV battery junction block assembly connector.
    8. Install the No. 1 HV battery cover panel RH.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE HV BATTERY JUNCTION BLOCK ASSEMBLY. Refer to  REMOVAL [11/2015 - 12/2018] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

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