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 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 is reset due to an instantaneous interruption of power source.

(1 trip detection logic)

  • Wire harness or connector

  • Hybrid vehicle control ECU

Does not come on

Master Warning Light:

Comes on

WIRING DIAGRAM

C299376E15

CAUTION / NOTICE / HINT

Tip:

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.

    CHECK AUXILIARY BATTERY TERMINAL (CONTACT PROBLEM)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

    Click here

    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 hereClick hereClick 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 CONNECTOR)

    Click here

    Result

    Proceed to

    OK

    NG
    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 and junction block assembly.

      C298833C10

      *1

      No. 2 Engine Room Relay Block and Junction Block Assembly

      *2

      IGCT Relay

      *a

      Rear view of wire harness connector

      (to Hybrid Vehicle Control ECU)

      -

      -

    2. Disconnect the A65 and A66 hybrid vehicle control ECU connectors.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      A66-4 (+B1) - 5 (IGCT relay)

      Power switch off

      Below 1 Ω

      A65-1 (+B2) - 5 (IGCT relay)

      Power switch off

      Below 1 Ω

    4. Install the IGCT relay.

    5. Reconnect the A66 and A65 hybrid vehicle control ECU 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 and the No. 2 engine room relay block and junction block assembly.

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

    Result

    Proceed to

    Problem symptom does not recur.

    Problem symptom recurs.
    Problem symptom does not recur.

    REPLACE HYBRID VEHICLE CONTROL ECU

    Click here

    Problem symptom recurs.

    REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA