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 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 relay or the IGCT relay is stuck closed.

  • Wire harness or connector

  • IGCT relay

  • Power management control ECU

WIRING DIAGRAM

A01JAC7E03

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)


    1. Remove the IGCT relay from the engine room junction block assembly.

    2. A01JCRYE03
      Text in Illustration
      *1 IGCT 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 relay.


    NG

    REPLACE RELAY (IGCT)

    OK

  2. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - ENGINE ROOM RELAY BLOCK)


    1. Remove the IGCT relay from the engine room junction block assembly.

    2. Disconnect connector A21 and A22 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.

      A01JBKQE01
      Text in Illustration
      *1

      Rear view of wire harness connector

      (to Power Management Control ECU)

      		 *2 Engine Room Junction Block Assembly
      *3 IGCT relay - -
      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      A22-5 (+B1), A21-2 (+B2) or 3 (IGCT 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.

    5. Turn the power switch off.

    6. Install the IGCT relay.

    7. Connect the power management control ECU connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE POWER MANAGEMENT CONTROL ECU Click here