HYBRID CONTROL SYSTEM, Diagnostic DTC:P3110-139

DTC Code DTC Name
P3110-139 HV Main Relay

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 139 Short to +B in the ST CUT/IGCT2 relay drive signal circuit

  • Wire harness or connector

  • Relay

  • Hybrid vehicle control ECU

WIRING DIAGRAM

A000THJE03
*a Auxiliary Battery
*b Hybrid Vehicle Control ECU

CAUTION / NOTICE / HINT

Tech Tips

If battery voltage is applied to terminal MREL of the hybrid vehicle control ECU, even though the power switch is off, +B power source voltage will be applied to terminals +B and +B2 of the hybrid vehicle control ECU.

PROCEDURE


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


    1. Disconnect connector A76 from the hybrid vehicle control ECU.

    2. Turn the power switch on (IG).

    3. A000TZGE02
      *1 Rear view of wire harness connector: (to Hybrid Vehicle Control ECU)

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

      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 Switch Condition Specified Condition
      A76-3 (MREL) - Body ground Power switch on (IG) Below 1 V

    OK

    REPLACE HYBRID VEHICLE CONTROL ECU Click here

    NG

  2. CHECK RELAY (ST CUT/IGCT2 RELAY)


    1. Turn the power switch off.

    2. A000XUJE03
      *1 Engine Room No. 2 Relay Block
      *2 ST CUT/IGCT2 Relay

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

    3. A000YQR

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

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

    NG

    REPLACE RELAY (ST CUT/IGCT2 RELAY)

    OK

  3. CHECK RELAY (ST/IGCT RELAY)


    1. Turn the power switch off.

    2. A000YAIE01
      *1 ST/IGCT Relay

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

    3. A000YQR

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

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

    OK

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    NG

    REPLACE RELAY (ST/IGCT RELAY)