HYBRID CONTROL SYSTEM, Diagnostic DTC:P2511-149

DTC Code DTC Name
P2511-149 HV CPU Power Relay Sense Circuit Intermittent No Continuity

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 ignition switch to ON (READY), the hybrid vehicle control ECU is reset due to an instantaneous interruption of power source.

(1 trip detection logic)

  • Wire harness or connector

  • Hybrid vehicle control ECU

WIRING DIAGRAM

Refer to the wiring diagram for DTC P3110-223 Click here.

CAUTION / NOTICE / HINT

Tech Tips

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


  1. Turn the ignition switch to ON (READY) and wait for 30 seconds or more.

    (If the DTC is not output, drive the vehicle on urban roads according to the freeze frame data item "Vehicle Spd" for approximately 5 minutes.)

PROCEDURE


  1. CHECK AUXILIARY BATTERY TERMINAL


    1. Confirm whether the auxiliary battery terminals have been disconnected recently.

      Result
      Result Proceed to
      Terminals have been disconnected. A
      Terminals have not been disconnected. B

    B

    CHECK AUXILIARY BATTERY TERMINAL (CONTACT PROBLEM) Click here

    A

  2. CONFIRM THAT HYBRID SYSTEM WARNING LIGHT


    1. Turn the ignition switch to ON (READY) from off.

    2. Confirm that the master warning light illuminates.

      Result
      Result Proceed to
      Hybrid system light illuminates. A
      Hybrid system light does not illuminates. B

      Tech Tips

      DTC P2511-149 may be stored after disconnecting and reconnecting the auxiliary battery terminals. If this happens, the DTC will not be output if the ignition switch is turned off and then on (READY) again. In this case, clear DTCs to complete the inspection.

    3. Turn the ignition switch off.


    B

    END

    A

  3. CLEAR DTC


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON (IG).

    3. Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.

    4. Read and record the DTCs and freeze frame data.

    5. Clear the DTCs and freeze frame data.

    6. Turn the ignition switch off.


    NEXT

  4. CHECK DTC OUTPUT (HYBRID CONTROL)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON (IG).

    3. Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.

    4. Check if DTCs are output.

      Result
      Result Proceed to
      DTC P2511-149 is output again. A
      DTCs other than P2511-149 are also output. B

    5. Turn the ignition switch off.


    B

    GO TO DTC CHART (HYBRID CONTROL SYSTEM) Click here

    A

  5. CHECK AUXILIARY 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

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


    1. A01V0I0E02
      Text in Illustration
      *A for LHD
      *B for RHD

      Check the connector connections and contact pressure of the relevant terminals for the hybrid vehicle control ECU connectors Click here.

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

    NG

    CONNECT SECURELY

    OK

  7. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - IGCT RELAY)


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

    2. Disconnect the hybrid vehicle control ECU connectors.

      A004G4EE02
      Text in Illustration
      *1 No. 2 Engine Room Relay Block *2 IGCT Relay Holder
      *a

      Rear view of wire harness connector

      (to Hybrid Vehicle Control ECU)

      		 - -

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      A27-4 (+B1) - 5 (IGCT relay holder) Ignition switch off Below 1 Ω
      A26-1 (+B2) - 5 (IGCT relay holder) Ignition switch off Below 1 Ω

    4. Install the IGCT relay.

    5. Connect the hybrid vehicle control ECU connectors.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  8. 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 No. 2 engine room relay block.

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

        Result
        Result Proceed to
        Problem symptom does not recur. A
        Problem symptom recurs. B

    A

    REPLACE HYBRID VEHICLE CONTROL ECU Click here

    B

    REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA