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 assembly detected an instantaneous interruption in +B power source voltage.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Warning Indicate
P2511-149 HV CPU Power Relay Sense Circuit Intermittent No Continuity

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

(1 trip detection logic)

  • Wire harness or connector

  • Hybrid vehicle control ECU assembly

 Does not come on

Master Warning Light:

Comes on

WIRING DIAGRAM

A01OBQBE29
*a IGCT NO. 1
*b MAIN
*c Auxiliary Battery
*d Hybrid Vehicle Control ECU Assembly

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 power switch 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
      Proceed to
      Terminals have been disconnected.
      Terminals have not been disconnected.

    Terminals have not been disconnected.

    GO TO STEP 5 Click here

    Terminals have been disconnected.

  2. CONFIRM MASTER WARNING LIGHT


    1. Turn the power switch on (READY) from off.

    2. Confirm that the master warning light illuminates.

      Result
      Proceed to
      Master warning light illuminates.
      Master warning light does not illuminate.

      Note

      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 power switch is turned off and then on (READY) again. In this case, clear DTCs to complete the inspection.

    3. Turn the power switch off.


    Master warning light does not illuminate.

    END

    Master warning light illuminates.

  3. CLEAR DTC

    Result
    Proceed to
    NEXT

    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

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

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


      Powertrain > Hybrid Control > Trouble Codes

    5. Clear the DTCs and freeze frame data.


      Powertrain > Hybrid Control > Clear DTCs

    6. Turn the power switch off.

      Result
      Proceed to
      NEXT

    NEXT

  4. CHECK DTC OUTPUT (HYBRID CONTROL)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

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

    4. Check for DTCs.


      Powertrain > Hybrid Control > Trouble Codes
      Result
      Proceed to
      DTC P2511-149 is output again.
      DTCs other than P2511-149 are also output.

    5. Turn the power switch off.


    DTCs other than P2511-149 are also output.

    GO TO DTC CHART (HYBRID CONTROL SYSTEM) Click here

    DTC P2511-149 is output again.

  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.
      Result
      Proceed to
      OK
      NG

    NG

    CONNECT SECURELY

    OK

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

    Result
    Proceed to
    OK
    NG

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

      Click here

      OK
      The connectors are connected securely and there are no contact pressure problems.
      B004GK9C01
      *A for LHD *B for RHD
      Result
      Proceed to
      OK
      NG

    NG

    CONNECT SECURELY

    OK

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


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

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

      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)

      		 - -

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A81-4 (+B1) - 5 (IGCT relay) Power switch off Below 1 Ω
      A80-1 (+B2) - 5 (IGCT relay) Power switch off Below 1 Ω

    4. Install the IGCT relay.

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

      Result
      Proceed to
      OK
      NG

    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 the connectors and wire harnesses between the hybrid vehicle control ECU assembly and the No. 1 engine room relay block and No. 1 junction block assembly.

      2. When the power switch is on (READY), jiggle the connectors and wire harnesses between the hybrid vehicle control ECU assembly and the No. 1 engine room relay block and No. 1 junction block assembly.

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

    Problem symptom does not recur.

    REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY Click here

    Problem symptom recurs.

    REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA