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Home >> Toyota >> 2020 >> RAV4 XLE, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 166 (Hybrid Control System (2WD, W/ Nickel Metal Hydride Battery) - Diagnostic Codes (5 Of 6)) >> HYBRID CONTROL SYSTEM (for 2WD with NICKEL METAL HYDRIDE BATTERY) >> DTC P2530-12: IG2 Signal Circuit Short to Auxiliary Battery [11/2018 - 08/2020] >> Procedure

DTC P2530-12: IG2 Signal Circuit Short to Auxiliary Battery [11/2018 - 08/2020]: Procedure

WARNING: This page is about a different variant/trim than selected.
  1. CHECK AUXILIARY BATTERY VOLTAGE 
    1. Turn the power switch off and turn on the high beam headlights for 30 seconds. This will remove the surface charge from the auxiliary battery.
    2. Measure the auxiliary battery voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      Positive (+) auxiliary battery terminal - Negative (-) auxiliary battery terminal 20°C (68°F), Power switch off 12.0 V or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    See step  3

    Result: 

    NG 

    See step  2

  2. CHARGE OR REPLACE AUXILIARY BATTERY 
    1. Charge or replace the auxiliary battery.

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  3

  3. CLEAR DTC 
    1. Connect the Techstream to the DLC3.
    2. Turn the power switch on (IG).
    3. Turn the Techstream on.
    4. Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.
    5. Clear the DTCs.

      Powertrain > Hybrid Control > Clear DTCs 

    6. Turn the power switch off.

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  4

  4. CHECK DTC OUTPUT (HYBRID CONTROL) 
    1. Turn the power switch on (IG) and wait for 15 seconds or more.
    2. Turn the power switch off and wait for 2 minutes or more.
    3. Connect the Techstream to the DLC3.
    4. Turn the power switch on (IG).
    5. Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.

      Powertrain > Hybrid Control > Trouble Codes 

    6. Check for DTCs.

      Result

      Result  Proceed to
      P2530-12 is output. A
      P2530-12 is not output. B
    7. Turn the power switch off.

    Result: 

    B 

    CHECK FOR INTERMITTENT PROBLEMS 

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

    Result: 

    A 

    See step  5

  5. CHECK DTC OUTPUT (HYBRID CONTROL) 
    1. Connect the Techstream to the DLC3.
    2. Turn the power switch on (IG).
    3. Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.
    4. Check for DTCs.

      Powertrain > Hybrid Control > Trouble Codes 

      Result

      Result  Proceed to
      U0129-87, U0140-87, U0151-87, U0164-87, U1107-87 or U1170-87 is output A
      Other than above B
    5. Turn the power switch off.

    Result: 

    B 

    REPLACE CERTIFICATION ECU (SMART KEY 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: 

    A 

    See step  6

  6. CHECK HYBRID VEHICLE CONTROL ECU ASSEMBLY 
    1. Disconnect the A31 hybrid vehicle control ECU assembly connectors.
      GTY868659Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Hybrid Vehicle Control ECU Assembly)
    2. Measure the voltage according to the value(s) in the table below.

      Condition

      Tester Connection Condition
      A31-35 (IG2) - A31-12 (E01) Power switch off
    3. Reconnect the A31 hybrid vehicle control ECU assembly connectors.

      Result

      Result  Proceed to
      9 V or higher A
      Below 9 V B

    Result: 

    B 

    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: 

    A 

    See step  7

  7. CHECK ECM 
    1. Disconnect the A31 hybrid vehicle control ECU assembly connectors.
      GTY868659Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Hybrid Vehicle Control ECU Assembly)
    2. Disconnect the A24 ECM connector.
    3. Measure the voltage according to the value(s) in the table below.

      Condition

      Tester Connection Condition
      A31-35 (IG2) - A31-12 (E01) Power switch off
    4. Reconnect the A24 ECM connector.
    5. Reconnect the A31 hybrid vehicle control ECU assembly connectors.

      Result

      Result  Proceed to
      9 V or higher A
      Below 9 V B

    Result: 

    B 

    REPLACE ECM 

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

    Result: 

    A 

    See step  8

  8. INSPECT RELAY (IG2 NO. 1) 
    1. Remove the IG2 NO. 1 relay from the No. 1 engine room relay block and junction block assembly.
      GTY860729Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 No. 1 Engine Room Relay Block and Junction Block Assembly
      *2 IG2 NO. 1 Relay
    2. Measure the resistance according to the value(s) in the table below.
      GTY483225Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Condition Specified Condition
      3 - 5 Auxiliary battery voltage not applied between terminals 1 and 2 10 kΩ or higher
      Auxiliary battery voltage applied between terminals 1 and 2 Below 1 Ω
    3. Install the IG2 NO. 1 relay.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE RELAY (IG2 NO. 1) 

    Result: 

    OK 

    See step  9

  9. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU ASSEMBLY - IG2 NO. 1 RELAY) 
    1. Disconnect the A31 hybrid vehicle control ECU assembly connector.
    2. Remove the IG2 NO. 1 relay from the No. 1 engine room relay block and junction block assembly.
    3. Measure the voltage according to the value(s) in the table below.
      GTY932891Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Hybrid Vehicle Control ECU Assembly)

      Standard Voltage

      Tester Connection Condition Specified Condition
      A31-35 (IG2) - Body ground Power switch off 1 V or less
    4. Install the IG2 NO. 1 relay.
    5. Reconnect the A31 hybrid vehicle control ECU assembly connector.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    CHECK FOR INTERMITTENT PROBLEMS 

    1. Check for intermittent problems.

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

      1. Check the connection and terminal contact pressure of the connectors and wire harnesses between the hybrid vehicle control ECU assembly and the IG2 NO. 1 relay.
      2. When the power switch is on (READY), jiggle the connectors and wire harnesses between the hybrid vehicle control ECU assembly and the IG2 NO. 1 relay.

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

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