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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 (6 Of 8) >> HYBRID CONTROL SYSTEM (for LITHIUM-ION BATTERY) >> DTC P2530-12: IG2 Signal Circuit Short to Auxiliary Battery [11/2015 -] >> Procedure

DTC P2530-12: IG2 Signal Circuit Short to Auxiliary Battery [11/2015 -]: Procedure

  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 11.0 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. Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.
    4. Clear the DTCs.

      Powertrain > Hybrid Control > Clear DTCs 

    5. Turn the power switch off and wait for 2 minutes or more.

      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.
    6. Check for DTCs.

      Powertrain > Hybrid Control > Trouble Codes 

      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 [11/2015 -] 

    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 [11/2015 - 12/2018]  , or refer to  REMOVAL [12/2018 - 07/2020]  , or refer to  REMOVAL [07/2020 -] 

    Result: 

    A 

    See step  6

  6. CHECK HYBRID VEHICLE CONTROL ECU 
    1. Disconnect the F2 hybrid vehicle control ECU connector.
      GTY606748Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Hybrid Vehicle Control ECU)
    2. Measure the voltage according to the value(s) in the table below.

      (F2)

      (F2)

      Tester Connection Condition
      F2-35 (IG2) - F2-12 (E01) Power switch off
    3. Reconnect the F2 hybrid vehicle control ECU connector.

      Result

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

    Result: 

    B 

    REPLACE HYBRID VEHICLE CONTROL ECU. Refer to  REMOVAL [11/2015 - 12/2018]  , or refer to  REMOVAL [12/2018 - 08/2019]  , or refer to  REMOVAL [08/2019 - 07/2020]  , or refer to  REMOVAL [07/2020 -] 

    Result: 

    A 

    See step  7

  7. CHECK ECM 
    1. Disconnect the F2 hybrid vehicle control ECU connector.
      GTY606748Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Hybrid Vehicle Control ECU)
    2. Disconnect the A40 and C31 ECM connectors.
    3. Measure the voltage according to the value(s) in the table below.

      (F2)

      (F2)

      Tester Connection Condition
      F2-35 (IG2) - F2-12 (E01) Power switch off
    4. Reconnect the A40 and C31 ECM connectors.
    5. Reconnect the F2 hybrid vehicle control ECU connector.

      Result

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

    Result: 

    B 

    REPLACE ECM. Refer to  REMOVAL [11/2015 - 12/2018]  , or refer to  REMOVAL [12/2018 - 07/2020]  , or refer to  REMOVAL [07/2020 -] 

    Result: 

    A 

    See step  8

  8. INSPECT NO. 1 INTEGRATION RELAY (IG2 NO. 1 RELAY) 

    Refer to INSPECTION [11/2015 -]

    Result

    Proceed to
    OK
    NG

    Result: 

    NG 

    REPLACE NO. 1 INTEGRATION RELAY. Refer to  REMOVAL [11/2015 - 12/2018]  , or refer to  REMOVAL [12/2018 - 07/2020]  , or refer to  REMOVAL [07/2020 -] 

    Result: 

    OK 

    See step  9

  9. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - NO. 1 INTEGRATION RELAY) 
    1. Disconnect the F2 hybrid vehicle control ECU connector.
    2. Remove the NO. 1 integration relay from the No. 1 engine room relay block and No. 1 junction block assembly.

      HINT: 

      Refer to REMOVAL [11/2015 - 12/2018] , or refer to REMOVAL [12/2018 - 07/2020] , or refer to REMOVAL [07/2020 -]

    3. Measure the voltage according to the value(s) in the table below.
      GTY579859Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Hybrid Vehicle Control ECU)

      Standard Voltage

      (F2)

      (F2)

      Tester Connection Condition Specified Condition
      F2-35 (IG2) - Body ground Power switch off 1 V or less
    4. Install the NO. 1 integration relay.
    5. Reconnect the F2 hybrid vehicle control ECU connector.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    CHECK FOR INTERMITTENT PROBLEMS 

    1. Check for intermittent problems.

      HINT: 

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

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

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

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