HYBRID CONTROL SYSTEM, Diagnostic DTC:P06881F

DTC Code DTC Name
P06881F ECM/PCM Power Relay Sense Circuit Intermittent

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
P06881F ECM/PCM Power Relay Sense Circuit Intermittent

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

CONFIRMATION DRIVING PATTERN

Tech Tips

After repairs have been completed, clear the DTCs and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.

Click here


  1. Connect the GTS to the DLC3.

  2. Turn the power switch on (IG) and turn the GTS on.

  3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).

  4. Turn the power switch off and wait for 2 minutes or more.

  5. Turn the power switch on (IG) and turn the GTS on.

  6. 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 Speed" for approximately 5 minutes.)

  7. Enter the following menus: Powertrain / Hybrid Control / Utility / All Readiness.

  8. Check the DTC judgment result.

    Tech Tips


    • If the judgment result shows NORMAL, the system is normal.

    • If the judgment result shows ABNORMAL, the system has a malfunction.

    • If the judgment result shows INCOMPLETE, perform driving pattern again.

WIRING DIAGRAM

B004RQGE25
*a IGCT NO.1
*b R/B RR NO.2
*c Auxiliary Battery
*d Hybrid Vehicle Control ECU Assembly

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
    A
  2. CONFIRM MASTER WARNING LIGHT


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

    2. Confirm that the master warning light illuminates.

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

      Note

      DTC P06881F 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 the DTCs to complete the inspection.

    3. Turn the power switch off.


    B
    A
  3. CLEAR DTC


    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
      Result Proceed to
      DTC P06881F is output again. A
      DTCs other than P06881F are also output. B
    5. Turn the power switch off.


    B
    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.
      Result
      Proceed to
      OK
      NG

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

    Result
    Proceed to
    OK
    NG

    1. B004W01C01
      *A for LHD
      *B for RHD

      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.
      Result
      Proceed to
      OK
      NG

    NG
    OK
  7. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU ASSEMBLY - IGCT NO.1 RELAY)


    1. Remove the IGCT NO.1 relay from the No. 2 luggage room relay block.

    2. Disconnect the G92 and G93 hybrid vehicle control ECU assembly connectors.

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

      B004XQ5C04
      *1 No. 2 Luggage Room Relay Block *2 IGCT NO.1 Relay
      *a

      Rear view of wire harness connector

      (to Hybrid Vehicle Control ECU Assembly)

      - -
      Standard Resistance
      Tester Connection Condition Specified Condition
      G92-4 (+B1) - 5 (IGCT NO.1 relay) Power switch off Below 1 Ω
      G93-3 (+B2) - 5 (IGCT NO.1 relay) Power switch off Below 1 Ω
    4. Reconnect the G92 and G93 hybrid vehicle control ECU assembly connectors.

    5. Install the IGCT NO.1 relay.

      Result
      Proceed to
      OK
      NG

    NG
    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. 2 luggage room relay block.

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

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

    A
    B