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Home >> Toyota >> 2020 >> RAV4 LE, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 139 (Hybrid Control System (Lithium-Ion Battery) - Diagnostic Codes (5 Of 6)) >> HYBRID CONTROL SYSTEM (for LITHIUM-ION BATTERY) >> DTC P2530-12: IG2 Signal Circuit Short to Auxiliary Battery [06/2020 - ] >> Procedure

DTC P2530-12: IG2 Signal Circuit Short to Auxiliary Battery [06/2020 - ]: Procedure

WARNING: This page is about a different variant/trim than selected.
  1. CHECK VEHICLE CONDITION 
    1. Check the vehicle condition.

      Result

      Result Proceed to
      w/ Smart Key System A
      w/o Smart Key System B

    Result: 

    B 

    See step  11

    Result: 

    A 

    See step  2

  2. CHECK AUXILIARY BATTERY VOLTAGE 
    1. Turn the ignition 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), Ignition switch off 12.0 V or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    See step  4

    Result: 

    NG 

    See step  3

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

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  4

  4. CLEAR DTC 
    1. Connect the Techstream to the DLC3.
    2. Turn the ignition switch to ON.
    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 ignition switch off.

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  5

  5. CHECK DTC OUTPUT (HYBRID CONTROL) 
    1. Turn the ignition switch to ON and wait for 15 seconds or more.
    2. Turn the ignition switch off and wait for 2 minutes or more.
    3. Connect the Techstream to the DLC3.
    4. Turn the ignition switch to ON.
    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 ignition switch off.

    Result: 

    B 

    CHECK FOR INTERMITTENT PROBLEMS 

    Refer to CHECK FOR INTERMITTENT PROBLEMS [06/2020 - ]

    Result: 

    A 

    See step  6

  6. CHECK DTC OUTPUT (HYBRID CONTROL) 
    1. Connect the Techstream to the DLC3.
    2. Turn the ignition switch to ON.
    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 ignition switch off.

    Result: 

    B 

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) 

    Refer to REMOVAL [10/2019 - 08/2020] , or refer to REMOVAL [08/2020 - 12/2021] , or refer to REMOVAL [12/2021 - 10/2022] , or refer to REMOVAL [10/2022 - 10/2023] , or refer to REMOVAL [10/2023 - ]

    Result: 

    A 

    See step  7

  7. 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) Ignition 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 [10/2019 - 08/2020] , or refer to REMOVAL [08/2020 - 12/2021] , or refer to REMOVAL [12/2021 - 10/2022] , or refer to REMOVAL [10/2022 - 10/2023] , or refer to REMOVAL [10/2023 - ]

    Result: 

    A 

    See step  8

  8. 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) Ignition 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 [02/2019 - 08/2020] , or refer to REMOVAL [08/2020 - 12/2021] , or refer to REMOVAL [12/2021 - 10/2022] , or refer to REMOVAL [10/2022 - 10/2023] , or refer to REMOVAL [10/2023 - ]

    Result: 

    A 

    See step  9

  9. 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  10

  10. 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 Ignition 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 [06/2020 - ]

      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 ignition 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 

  11. CLEAR DTC 
    1. Connect the Techstream to the DLC3.
    2. Turn the ignition switch to ON.
    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 ignition switch off.

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  12

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

      Powertrain > Hybrid Control > Trouble Codes 

    6. Check for DTCs.

      Result

      Result  Proceed to
      Only P2530-12 is output or P2530-12 and DTCs other than U0140-87 are also output. A
      U0140-87 is output. B
      DTCs other than P2530-12 or U0140-87 are output. C
      No DTCs are output. D
    7. Turn the ignition switch off.

    Result: 

    B 

    GO TO DTC CHART (U0140-87) 

    Refer to DTC U0100-87: Lost Communication with ECM/PCM "A" Missing Message; DTC U0104-87: Lost Communication with Cruise Control Module Missing Message; DTC U0110-87: Lost Communication with Drive Motor Control Module "A" Missing Message; DTC U0126-87: Lost Communication with Steering Angle Sensor Module Missing Message; DTC U0129-87: Lost Communication with Brake System Control Module Missing Message; DTC U0140-87: Lost Communication with Body Control Module Missing Message; DTC U0151-87: Lost Communication with Restraints Control Module Missing Message; DTC U0164-87: Lost Communication with HVAC Control Module Missing Message; DTC U0293-87: Lost Communication with Hybrid/EV Powertrain Control Module Missing Message; DTC U1107-87: Lost Communication with Power Management Module Missing Message; DTC U1170-87: Lost Communication with Brake System Control Module (Secondary CAN Line) Missing Message; DTC U1175-87: Lost Communication with Hybrid/EV Battery Energy Control Module "A" (Powertrain Bus) Missing Message [06/2020 - 12/2021] , or refer to DTC U0100-87: Lost Communication with ECM/PCM "A" Missing Message; DTC U0104-87: Lost Communication with Cruise Control Module Missing Message; DTC U0110-87: Lost Communication with Drive Motor Control Module "A" Missing Message; DTC U0126-87: Lost Communication with Steering Angle Sensor Module Missing Message; DTC U0129-87: Lost Communication with Brake System Control Module Missing Message; DTC U0140-87: Lost Communication with Body Control Module Missing Message; DTC U0151-87: Lost Communication with Restraints Control Module Missing Message; DTC U0164-87: Lost Communication with HVAC Control Module Missing Message; DTC U0293-87: Lost Communication with Hybrid/EV Powertrain Control Module Missing Message; DTC U1107-87: Lost Communication with Power Management Module Missing Message; DTC U1170-87: Lost Communication with Brake System Control Module (Secondary CAN Line) Missing Message; DTC U1175-87: Lost Communication with Hybrid/EV Battery Energy Control Module "A" (Powertrain Bus) Missing Message [12/2021 - ]

    Result: 

    C 

    GO TO DTC CHART (HYBRID CONTROL SYSTEM) 

    Refer to DIAGNOSTIC TROUBLE CODE CHART [06/2020 - 12/2021] , or refer to DIAGNOSTIC TROUBLE CODE CHART [12/2021 - 11/2024] , or refer to DIAGNOSTIC TROUBLE CODE CHART [11/2024 - ]

    Result: 

    D 

    See step  16

    Result: 

    A 

    See step  13

  13. CHECK FUSIBLE LINK BLOCK ASSEMBLY (DC/DC) 
    1. Disconnect the cable from the negative (-) auxiliary battery terminal.
    2. Remove the fusible link block assembly (DC/DC).
      GTY889238Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Fusible link block assembly
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      1G-1 - 1A-1 Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE FUSIBLE LINK BLOCK ASSEMBLY (DC/DC) 

    Result: 

    OK 

    See step  14

  14. CHECK WIRE HARNESS AND CONNECTOR (IG1 NO. 1 RELAY - POWER SOURCE CIRCUIT) 
    1. Disconnect the instrument panel junction block assembly connector.
    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      4K-1 - Body ground Ignition switch off 11 to 14 V
      GTY861248Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (Instrument Panel Junction Block Assembly)
    3. Connect the instrument panel junction block assembly connector.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  15

  15. CHECK WIRE HARNESS AND CONNECTOR (IG1 NO. 1 RELAY - BODY GROUND) 
    1. Disconnect the 4D instrument panel junction block assembly connector.
    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      4D-3 - Body ground Ignition switch off Below 1 Ω
      GTY860393Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Instrument Panel Junction Block Assembly)
    3. Connect the 4D instrument panel junction block assembly connector.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (IG1 NO. 1 RELAY) 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  16. CHECK DTC OUTPUT (HYBRID CONTROL) 
    1. Turn the ignition switch to ON and wait for 15 seconds or more.
    2. Turn the ignition switch off and wait for 2 minutes or more.
    3. Connect the Techstream to the DLC3.
    4. Turn the ignition switch to ON.
    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 ignition switch off.

    Result: 

    B 

    CHECK FOR INTERMITTENT PROBLEMS 

    Refer to CHECK FOR INTERMITTENT PROBLEMS [06/2020 - ]

    Result: 

    A 

    See step  17

  17. 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) Ignition 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 [10/2019 - 08/2020] , or refer to REMOVAL [08/2020 - 12/2021] , or refer to REMOVAL [12/2021 - 10/2022] , or refer to REMOVAL [10/2022 - 10/2023] , or refer to REMOVAL [10/2023 - ]

    Result: 

    A 

    See step  18

  18. 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) Ignition 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 [02/2019 - 08/2020] , or refer to REMOVAL [08/2020 - 12/2021] , or refer to REMOVAL [12/2021 - 10/2022] , or refer to REMOVAL [10/2022 - 10/2023] , or refer to REMOVAL [10/2023 - ]

    Result: 

    A 

    See step  19

  19. 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  20

  20. 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 Ignition 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 [06/2020 - ]

      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 ignition 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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