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Home >> Toyota >> 2020 >> RAV4 LE, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 171 (Hybrid Control System (2WD, W/ Nickel Metal Hydride Battery) - Diagnostic Codes (3 Of 6)) >> HYBRID CONTROL SYSTEM (for 2WD with NICKEL METAL HYDRIDE BATTERY) >> DTC P0AD9-15: Hybrid/EV Battery Positive Contactor Circuit Short to Auxiliary Battery or Open [11/2018 - 08/2020] >> Procedure

DTC P0AD9-15: Hybrid/EV Battery Positive Contactor Circuit Short to Auxiliary Battery or Open [11/2018 - 08/2020]: Procedure

WARNING: This page is about a different variant/trim than selected.
  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.
    4. Read the Data List.

      Powertrain > Hybrid Control > Data List 

      Tester Display
      SMRB Status

      Standard

      Tester Display Condition Specified Condition
      SMRB Status Power switch on (IG) OFF
    5. Turn the power switch off.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  5

    Result: 

    OK 

    See step  2

  2. CHECK CONNECTOR CONNECTION CONDITION (HYBRID VEHICLE CONTROL ECU ASSEMBLY CONNECTOR) 

    Refer to PROCEDURE - Step 1

    Result

    Proceed to
    OK
    NG

    Result: 

    NG 

    CONNECT SECURELY 

    Result: 

    OK 

    See step  3

  3. 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  4

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

    Refer to PROCEDURE - Step 8

    Result

    Proceed to
    OK
    NG

    Result: 

    OK 

    CHECK FOR INTERMITTENT PROBLEMS 

    Refer to CHECK FOR INTERMITTENT PROBLEMS [11/2018 - 08/2020]

    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.
      GTY938611Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component with harness connected
      (Hybrid Vehicle Control ECU Assembly)      		 - -

      Standard Voltage

      Tester Connection Condition Specified Condition
      A31-16 (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 ASSEMBLY CONNECTOR) 

    Refer to PROCEDURE - Step 1

    Result

    Proceed to
    OK
    NG

    Result: 

    OK 

    REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY 

    Refer to REMOVAL [11/2018 - 02/2019] , or refer to REMOVAL [02/2019 - 10/2019] , or refer to REMOVAL [10/2019 - 08/2020]

    Result: 

    NG 

    CONNECT SECURELY 

  7. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU ASSEMBLY - BODY GROUND) 
    1. Disconnect the A31 hybrid vehicle control ECU assembly connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      A31-16 (SMRB) - Body ground Power switch off 25.0 to 59.0 Ω
      GTY868637Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Hybrid Vehicle Control ECU Assembly)
    3. Reconnect the A31 hybrid vehicle control ECU assembly 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 appropriate service information because this may cause a malfunction.

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

      Refer to PROCEDURE - Step 9 [11/2018 - 02/2019] , or refer to PROCEDURE - Step 11 [02/2019 - 10/2019] , or refer to PROCEDURE - Step 11 [10/2019 - 06/2020] , or refer to PROCEDURE - Step 9 [06/2020 - 08/2020]

    3. Disconnect the M32 HV battery junction block assembly connector.
      GTY910202Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Disconnect the A31 hybrid vehicle control ECU assembly connector.
    5. Turn the power switch on (IG).
    6. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      A31-16 (SMRB) or M32-1 (SMRB) - Body ground Power switch on (IG) Below 1 V
      NOTE:

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

      GTY909022Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Hybrid Vehicle Control ECU Assembly)
      *b Front view of wire harness connector
      (to HV Battery Junction Block Assembly)
    7. Turn the power switch off.
    8. Reconnect the A31 hybrid vehicle control ECU assembly connector.
    9. Reconnect the M32 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 ASSEMBLY 

    Refer to REMOVAL [11/2018 - 02/2019] , or refer to REMOVAL [02/2019 - 10/2019] , or refer to REMOVAL [10/2019 - 08/2020]

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  9. 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  10

  10. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU ASSEMBLY - 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 appropriate service information because this may cause a malfunction.

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

      Refer to PROCEDURE - Step 9 [11/2018 - 02/2019] , or refer to PROCEDURE - Step 11 [02/2019 - 10/2019] , or refer to PROCEDURE - Step 11 [10/2019 - 06/2020] , or refer to PROCEDURE - Step 9 [06/2020 - 08/2020]

    3. Disconnect the M32 HV battery junction block assembly connector.
      GTY912327Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Disconnect the A31 hybrid vehicle control ECU assembly connector.
    5. Measure the resistance according to the value(s) in the table below.

      Standard Resistance (Check for Open)

      Tester Connection Condition Specified Condition
      A31-16 (SMRB) - M32-1 (SMRB) Power switch off Below 1 Ω

      Standard Resistance (Check for Short)

      Tester Connection Condition Specified Condition
      A31-16 (SMRB) or M32-1 (SMRB) - Body ground and other terminals Power switch off 10 kΩ or higher
      GTY909022Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Hybrid Vehicle Control ECU Assembly)
      *b Front view of wire harness connector
      (to HV Battery Junction Block Assembly)
    6. Reconnect the A31 hybrid vehicle control ECU assembly connector.
    7. Reconnect the M32 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 appropriate service information because this may cause a malfunction.

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

      Refer to PROCEDURE - Step 9 [11/2018 - 02/2019] , or refer to PROCEDURE - Step 11 [02/2019 - 10/2019] , or refer to PROCEDURE - Step 11 [10/2019 - 06/2020] , or refer to PROCEDURE - Step 9 [06/2020 - 08/2020]

    3. Disconnect the M32 HV battery junction block assembly connector.
    4. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      M32-3 (GND) - Body ground Power switch off Below 1 Ω
      GTY842652Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to HV Battery Junction Block Assembly)
    5. Reconnect the M32 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 appropriate service information because this may cause a malfunction.

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

      Refer to PROCEDURE - Step 9 [11/2018 - 02/2019] , or refer to PROCEDURE - Step 11 [02/2019 - 10/2019] , or refer to PROCEDURE - Step 11 [10/2019 - 06/2020] , or refer to PROCEDURE - Step 9 [06/2020 - 08/2020]

    3. Disconnect the M32 HV battery junction block assembly connector.
    4. Measure the resistance according to the value(s) in the table below.
      GTY877361Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component without harness connected
      (HV Battery Junction Block Assembly)      		 - -

      Standard Resistance

      Tester Connection Condition Specified Condition
      M32-1 (SMRB) - M32-3 (GND) -40 to 80°C (-40 to 176°F) 25.0 to 59.0 Ω
    5. Reconnect the M32 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 [11/2018 - 08/2020]

    Result: 

    NG 

    REPLACE HV BATTERY JUNCTION BLOCK ASSEMBLY 

    Refer to REMOVAL [11/2018 - 02/2019] , or refer to REMOVAL [02/2019 - 10/2019] , or refer to REMOVAL [10/2019 - 06/2020] , or refer to REMOVAL [06/2020 - 08/2020]

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