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Home >> Toyota >> 2018 >> Prius Three Touring >> 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 P0AD9-15: Hybrid/EV Battery Positive Contactor Circuit Short to Auxiliary Battery or Open [11/2015 - 12/2018] >> Procedure

DTC P0AD9-15: Hybrid/EV Battery Positive Contactor Circuit Short to Auxiliary Battery or Open [11/2015 - 12/2018]: Procedure

  1. READ VALUE USING TECHSTREAM (SMRB STATUS) 
    1. Connect the Techstream to the DLC3.
    2. Turn the power switch on (IG).
    3. Enter the following menus: Powertrain / Hybrid Control / Data List / SMRB Status.

      Powertrain > Hybrid Control > Data List 

      Tester Display
      SMRB Status
    4. Read the Data List.

      Result

      Result Proceed to
      The value of SMRB Status is OFF A
      Other than above B
    5. Turn the power switch off.

    Result: 

    B 

    See step  5

    Result: 

    A 

    See step  2

  2. CHECK CONNECTOR CONNECTION CONDITION (HYBRID VEHICLE CONTROL ECU CONNECTOR) 
    1. Check the connector connections and contact pressure of the relevant terminals for the hybrid vehicle control ECU connectors.

      HINT: 

      Refer to ELECTRONIC CIRCUIT INSPECTION PROCEDURE [11/2015 - ]

      GTY542745Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK

      The connectors are connected securely and there are no contact pressure problems.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    CONNECT SECURELY 

    Result: 

    OK 

    See step  3

  3. CHECK CONNECTOR CONNECTION CONDITION (FLOOR WIRE CONNECTOR) 
    1. Check the connection condition of the MF2 floor wire connector and the contact pressure of each terminal. Check the terminals for deformation, and check the connector for water ingress and foreign matter.

      HINT: 

      Refer to ELECTRONIC CIRCUIT INSPECTION PROCEDURE [11/2015 - ]

      GTY738606Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK

      - The connector is connected securely.

      - The terminals are not deformed and are connected securely.

      - No water or foreign matter in the connector.

      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  4

  4. CHECK CONNECTOR CONNECTION CONDITION (HV BATTERY JUNCTION BLOCK ASSEMBLY CONNECTOR) 
    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.

      HINT: 

      Refer to PROCEDURE - Step 29

    3. Check the connector connections and contact pressure of the relevant terminals of the M37 HV battery junction block assembly connector.

      HINT: 

      Refer to ELECTRONIC CIRCUIT INSPECTION PROCEDURE [11/2015 - ]

      OK

      The connectors are connected securely and there are no contact pressure problems.

      GTY538463Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Install the No. 1 HV battery cover panel RH.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    CHECK FOR INTERMITTENT PROBLEMS. Refer to  CHECK FOR INTERMITTENT PROBLEMS [11/2015 - ] 

    Result: 

    NG 

    CONNECT SECURELY 

  5. CHECK HARNESS AND CONNECTOR (SMRB VOLTAGE) 
    1. Turn the power switch on (IG).
    2. Measure the voltage according to the value(s) in the table below.
      GTY540231Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component with harness connected
      (Hybrid Vehicle Control ECU)      		 - -

      Standard Voltage

      (F2)

      (F2)

      Tester Connection Condition Specified Condition
      F2-16 (SMRB) - Body ground Power switch on (IG) Below 1 V
    3. Turn the power switch off.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  7

    Result: 

    OK 

    See step  6

  6. CHECK CONNECTOR CONNECTION CONDITION (HYBRID VEHICLE CONTROL ECU CONNECTOR) 
    1. Check the connector connections and contact pressure of the relevant terminals for the hybrid vehicle control ECU connectors.

      HINT: 

      Refer to ELECTRONIC CIRCUIT INSPECTION PROCEDURE [11/2015 - ]

      GTY542745Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK

      The connectors are connected securely and there are no contact pressure problems.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

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

    Result: 

    NG 

    CONNECT SECURELY 

  7. 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.

      Standard Resistance

      (F2)

      (F2)

      Tester Connection Condition Specified Condition
      F2-16 (SMRB) - Body ground Power switch off 20.6 to 40.8 Ω
      GTY579854Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Hybrid Vehicle Control ECU)
    3. Reconnect the F2 hybrid vehicle control ECU connector.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  9

    Result: 

    OK 

    See step  8

  8. CHECK HARNESS AND CONNECTOR (SHORT TO POWER SUPPLY WIRES) 
    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.

      HINT: 

      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. Turn the power switch on (IG).
    6. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      (F2, M37)

      (F2)

      (M37)

      Tester Connection Condition Specified Condition
      F2-16 (SMRB) or M37-1 (SMRB) - Body ground Power switch on (IG) Below 1 V
      NOTE:

      Turning the power switch on (IG) with the hybrid vehicle control ECU connector and the HV battery junction block assembly connector disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.

      GTY587820Courtesy 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)
    7. Turn the power switch off.
    8. Reconnect the F2 hybrid vehicle control ECU connector.
    9. Reconnect the M37 HV battery junction block assembly connector.
    10. Install the No. 1 HV battery cover panel RH.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

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

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  9. CHECK CONNECTOR CONNECTION CONDITION (FLOOR WIRE CONNECTOR) 
    1. Check the connection condition of the MF2 floor wire connector and the contact pressure of each terminal. Check the terminals for deformation, and check the connector for water ingress and foreign matter.

      HINT: 

      Refer to ELECTRONIC CIRCUIT INSPECTION PROCEDURE [11/2015 - ]

      GTY738606Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK

      - The connector is connected securely.

      - The terminals are not deformed and are connected securely.

      - No water or foreign matter in the connector.

      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  10

  10. 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.

      HINT: 

      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.

      Standard Resistance (Check for Open)

      (F2, M37)

      (F2)

      (M37)

      Tester Connection Condition Specified Condition
      F2-16 (SMRB) - M37-1 (SMRB) Power switch off Below 1 Ω

      Standard Resistance (Check for Short)

      (F2, M37)

      (F2)

      (M37)

      Tester Connection Condition Specified Condition
      F2-16 (SMRB) or M37-1 (SMRB) - Body ground and other terminals Power switch off 10 kΩ or higher
      GTY587820Courtesy 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)
    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: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  11

  11. CHECK HARNESS AND CONNECTOR (HV BATTERY JUNCTION BLOCK ASSEMBLY - BODY GROUND) 
    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.

      HINT: 

      Refer to PROCEDURE - Step 29

    3. Disconnect the M37 HV battery junction block assembly connector.
    4. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      (M37)

      (M37)

      Tester Connection Condition Specified Condition
      M37-3 (GND) - Body ground Power switch off Below 1 Ω
      GTY592535Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to HV Battery Junction Block Assembly)
    5. Reconnect the M37 HV battery junction block assembly connector.
    6. Install the No. 1 HV battery cover panel RH.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  12

  12. INSPECT HV BATTERY JUNCTION BLOCK ASSEMBLY (SMRB) 
    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.

      HINT: 

      Refer to PROCEDURE - Step 29

    3. Disconnect the M37 HV battery junction block assembly connector.
    4. Measure the resistance according to the value(s) in the table below.
      GTY596262Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component without harness connected
      (HV Battery Junction Block Assembly)      		 - -

      Standard Resistance

      (M37)

      (M37)

      Tester Connection Condition Specified Condition
      M37-1 (SMRB) - M37-3 (GND) -40 to 80°C (-40 to 176°F) 20.6 to 40.8 Ω
    5. Reconnect the M37 HV battery junction block assembly connector.
    6. Install the No. 1 HV battery cover panel RH.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    CHECK FOR INTERMITTENT PROBLEMS. Refer to  CHECK FOR INTERMITTENT PROBLEMS [11/2015 - ] 

    Result: 

    NG 

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

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