HYBRID CONTROL SYSTEM, Diagnostic DTC:P3110-223

DTC Code DTC Name
P3110-223 HV Main Relay

DESCRIPTION

The hybrid vehicle control ECU assembly monitors the IGCT relay and detects the following malfunction.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Warning Indicate
P3110-223 HV Main Relay

IGCT relay stuck on (+B short):

IGCT relay is stuck on or a short to B+ exists. Power to the hybrid vehicle control ECU assembly does not shut down when the power switch is turned off.

(1 trip detection logic)

  • Wire harness or connector

  • IGCT relay

  • Hybrid vehicle control ECU assembly

 Does not come on

Master Warning Light:

Comes on

WIRING DIAGRAM

Refer to the wiring diagram for DTC P2511-149.

Click here

CAUTION / NOTICE / HINT

Tech Tips


  • If auxiliary battery voltage is applied to the +B1 or +B2 terminal in the hybrid vehicle control ECU assembly even when the power switch is turned off, a short to B+ exists.

  • After the repair, clear the DTCs and perform the following procedure to check that DTCs are not output.


    1. Turn the power switch on (IG) and wait for 15 seconds or more.

    2. Turn the power switch off and wait for 30 seconds or more.

PROCEDURE


  1. INSPECT IGCT RELAY


    1. Remove the IGCT relay from the No. 1 engine room relay block and No. 1 junction block assembly.

    2. B004EMUC07
      *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 not applied between terminals 1 and 2 10 kΩ or higher

    3. Install the IGCT relay.

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE IGCT RELAY

    OK

  2. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU ASSEMBLY - NO. 1 ENGINE ROOM RELAY BLOCK AND NO. 1 JUNCTION BLOCK ASSEMBLY)


    1. Disconnect the A80 and A81 hybrid vehicle control ECU assembly connectors.

    2. Remove the IGCT relay from the No. 1 engine room relay block and No. 1 junction block assembly.

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

      A01OACGC12
      *1 No. 1 Engine Room Relay Block and No. 1 Junction Block Assembly *2 IGCT Relay
      *a

      Rear view of wire harness connector

      (to Hybrid Vehicle Control ECU Assembly)

      		 - -
      Standard Voltage
      Tester Connection Condition Specified Condition
      A81-4 (+B1), A80-1 (+B2) or 5 (IGCT relay) - Body ground Power switch off Below 1 V

    4. Install the IGCT relay.

    5. Reconnect the A80 and A81 hybrid vehicle control ECU assembly connectors.

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR