HYBRID CONTROL SYSTEM, Diagnostic DTC:P3110-223

DTC Code DTC Name
P3110-223 IGCT Relay Malfunction

DESCRIPTION

The hybrid vehicle control ECU monitors the ST CUT/IGCT2 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 IGCT2 relay or the ST CUT/IGCT2 relay is stuck closed.

  • Wire harness or connector

  • Relay

  • Hybrid vehicle control ECU

WIRING DIAGRAM

A01GZYGE03

INSPECTION PROCEDURE

Tech Tips

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

PROCEDURE


  1. CHECK DTC OUTPUT (HV)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the power switch on (IG).

    3. Move the shift lever to a position other than P.

    4. Leave the vehicle as is for approximately 1 second.

    5. Select the following menu items: Powertrain / Hybrid Control / Trouble Codes.

    6. Check if DTCs are output.

      Result
      Result Proceed to
      P3110-223 only is output. A
      Any of the following DTCs are also output. B
      DTC No. Relevant Diagnosis
      P0705-757 Transmission Range Sensor Circuit
      P0851-775 Park / Neutral Switch Input Circuit Low
      P0867-882 Transmission Fluid Pressure
      P2721-853 Pressure Control Solenoid Circuit High Voltage

    7. Move the shift lever to P position.


    B

    GO TO DTC CHART Click here

    A

  2. CHECK RELAY (ST CUT/IGCT2 RELAY)


    1. Turn the power switch off.

    2. A01H1JXE03

      Remove the ST CUT/IGCT2 relay from the engine room No. 2 relay block.

    3. A01GZ8X

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

      Standard resistance
      Tester Connection Condition Specified Condition
      3 - 5 Battery voltage is not applied between terminal 1 and 2. 10 kΩ or higher

    NG

    REPLACE RELAY (ST CUT/IGCT2 RELAY)

    OK

  3. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - ENGINE ROOM NO. 2 RELAY BLOCK)


    1. Disconnect connector A78 from the hybrid vehicle control ECU.

    2. Turn the power switch on (IG).

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

      A01GXEZE03

      Note

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

      Standard voltage
      Tester Connection Condition Specified Condition
      A78-1 (+B1), A78-2 (+B2) or Engine room No. 2 relay block Terminal 3 - Body ground Power switch on (IG) Below 1 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE HYBRID VEHICLE CONTROL ECU Click here