HYBRID CONTROL SYSTEM, Diagnostic DTC:P3110-223

DTC Code DTC Name
P3110-223 IGCT Relay Malfunction

DESCRIPTION

The power management control ECU (HV CPU) monitors the IGCT MAIN relay and detects the following malfunction.

DTC No. INF Code DTC Detection Condition Trouble Area
P3110 223 There is a short to +B in the IGCT MAIN relay or the IGCT MAIN relay is stuck closed.

  • Wire harness or connector

  • IGCT MAIN relay

  • Power management control ECU

WIRING DIAGRAM

A01NG8GE01

INSPECTION PROCEDURE

Tech Tips

If the battery voltage is applied to terminal +B1 or +B2 of the power management control ECU, even though the power switch is off, the circuit is shorted to +B.

PROCEDURE


  1. INSPECT RELAY (IGCT MAIN)


    1. Remove the IGCT MAIN relay from the engine room relay block No. 2.

    2. A01NEOZE03
      Text in Illustration
      *1 IGCT MAIN relay

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      3 - 5 Auxiliary battery voltage is not applied between terminals 1 and 2 10 kΩ or higher

    3. Install the IGCT MAIN relay.


    NG

    REPLACE RELAY (IGCT MAIN)

    OK

  2. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - HV SUB R/B 1)


    1. Remove the IGCT MAIN relay from the engine room relay block No. 2.

    2. Disconnect connector A80 and A81 from the power management control ECU.

    3. Turn the power switch on (IG).

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

      A01NHC5E01
      Text in Illustration
      *1

      Rear view of wire harness connector

      (to Power Management Control ECU)

      		 *2 Engine Room Relay Block No. 2
      *3 IGCT MAIN relay - -
      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      A81-5 (+B1), A80-2 (+B2) or 3 (IGCT MAIN relay) - Body ground Power switch on (IG) Below 1 V

      Note

      Turning the power switch on (IG) with the connector disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.

      Result
      Result Proceed to
      NG A
      OK (for LHD) B
      OK (for RHD) C

    5. Turn the power switch off.

    6. Install the IGCT MAIN relay.

    7. Connect the power management control ECU connector.


    B

    REPLACE POWER MANAGEMENT CONTROL ECU (for LHD) Click here

    C

    REPLACE POWER MANAGEMENT CONTROL ECU (for RHD) Click here

    A

    REPAIR OR REPLACE HARNESS OR CONNECTOR