ELECTRIC POWER CONTROL SYSTEM, Diagnostic DTC:B22A0

DTC Code DTC Name
B22A0 IG2 Terminal Circuit Low

DESCRIPTION

The electric power control ECU monitors the IG (IG2) voltage. When there is no voltage input to IG (IG2), this DTC is output.

DTC Code DTC Detection Condition Trouble Area
B22A0 IG (IG2) signal is input via CAN communication, but there is no IG (IG2) input voltage

  • P IG2 fuse

  • ECU-IG fuse

  • Engine room No. 2 junction block, relay block

  • Passenger side junction block (Electric power control ECU)

  • Wire harness

WIRING DIAGRAM

A001CO5E03

PROCEDURE


  1. CHECK PASSENGER SIDE JUNCTION BLOCK (IG INPUT VOLTAGE)

    A0018UHE01
    *1 Front view of wire harness connector: (to Passenger Side Junction Block)

    1. Disconnect the PK junction block connector.

    2. Measure the voltage according to the value(s) in the table below.

      Standard voltage
      Tester Connection Switch Condition Specified Condition
      PK-1 (IG) - Body ground Engine switch on (IG) 11 to 14 V

    NG

    CHECK HARNESS AND CONNECTOR (PASSENGER SIDE J/B - ENGINE ROOM NO. 2 J/B, R/B) Click here

    OK

  2. INSPECT FUSE (P IG2)


    1. Remove the P IG2 fuse from the passenger side junction block.

    2. Measure the resistance of the fuse.

      Standard resistance
      Tester Connection Condition Specified Condition
      P IG2 fuse Always Below 1 Ω

    OK

    REPLACE PASSENGER SIDE JUNCTION BLOCK (ELECTRIC POWER CONTROL ECU)

    NG

    REPLACE FUSE

  3. CHECK HARNESS AND CONNECTOR (PASSENGER SIDE J/B - ENGINE ROOM NO. 2 J/B, R/B)

    A001CLKE01
    *1 Front view of wire harness connector: (to Passenger Side Junction Block)
    *2 Front view of wire harness connector: (to Engine Room No. 2 Junction Block)

    1. Disconnect the PK and 2C junction block connectors.

    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance
      Tester Connection Condition Specified Condition
      PK-1 (IG) - 2C-30 Always Below 1 Ω
      PK-1 (IG) or 2C-30 - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK HARNESS AND CONNECTOR (ENGINE ROOM NO. 2 JUNCTION BLOCK, RELAY BLOCK - BATTERY)

    A001F2PE03
    *1 Front view of wire harness connector: (to Engine Room No. 2 Junction Block)

    1. Disconnect the 2E junction block connector.

    2. Measure the voltage according to the value(s) in the table below.

      Standard voltage
      Tester Connection Condition Specified Condition
      2E-1 - Body ground Always 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. INSPECT FUSE (ECU-IG)


    1. Remove the ECU-IG fuse from the engine room No. 2 junction block.

    2. Measure the resistance of the fuse.

      Standard resistance
      Tester Connection Condition Specified Condition
      ECU-IG fuse Always Below 1 Ω

    NG

    REPLACE FUSE

    OK

  6. CHECK FOR DTC (B2273)


    1. Check for DTC B2273 for 1UR-FE (see page ) or 1UR-FSE Click here.

      Result
      Result Proceed to
      DTC B2273 is not output A
      DTC B2273 is output (for 1UR-FE) B
      DTC B2273 is output (for 1UR-FSE) C

    A

    REPLACE ENGINE ROOM NO. 2 JUNCTION BLOCK

    B

    GO TO ENTRY AND START SYSTEM (for Starting) Click here

    C

    GO TO ENTRY AND START SYSTEM (for Starting) Click here