HYBRID CONTROL SYSTEM, Diagnostic DTC:P2511-149

DTC Code DTC Name
P2511-149 ECM/PCM Power Relay Sense Circuit Intermittent

DESCRIPTION

This DTC indicates that the hybrid vehicle control ECU monitors the +B power source voltage to detect an instantaneous interruption.

DTC No. INF Code DTC Detection Condition Trouble Area
P2511 149 When the power switch is on (READY), the hybrid vehicle control ECU is reset.

  • Wire harness or connector

  • Hybrid vehicle control ECU

WIRING DIAGRAM

Refer to the wiring diagram for DTC P3110-139 Click here.

PROCEDURE


  1. CHECK BATTERY TERMINAL (CONTACT PROBLEM)


    1. Check the connection of the auxiliary battery terminal.

      OK
      The terminal is connected securely and there is no contact problem.

    NG

    CONNECT SECURELY

    OK

  2. CHECK CONNECTOR CONNECTION CONDITION (HYBRID VEHICLE CONTROL ECU CONNECTOR)


    1. A000XH7E01
      *1 Hybrid Vehicle Control ECU

      Check the connections of the hybrid vehicle control ECU connectors.

      OK
      The connectors are connected securely and there are no contact problems.

    NG

    CONNECT SECURELY

    OK

  3. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - ST CUT/IGCT2 RELAY)


    1. Turn the power switch off.

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

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

      A000WQ2E02
      *1 Rear view of wire harness connector: (to Hybrid Vehicle Control ECU)
      *2 Engine Room No. 2 Relay Block

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

      Standard resistance
      Tester Connection Switch Condition Specified Condition
      A78-2 (+B2) - Engine room No. 2 relay block ST CUT/IGCT2 relay terminal 3 Power switch off Below 1 Ω
      A78-1 (+B1) - Engine room No. 2 relay block ST CUT/IGCT2 relay terminal 3 Power switch off Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK FOR INTERMITTENT PROBLEMS


    1. Check for intermittent problems Click here.


      1. Check the connection and terminal contact pressure of connectors and wire harnesses between the hybrid vehicle control ECU and the engine room No. 2 relay block.

      2. When the power switch is on (READY), jiggle the connectors and wire harnesses between the hybrid vehicle control ECU and the engine room No. 2 relay block.


    OK

    REPLACE HYBRID VEHICLE CONTROL ECU Click here

    NG

    REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA