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 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 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

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 or N/A, perform driving pattern again.

WIRING DIAGRAM

B004OISE17
*a BATT-MAIN
*b Auxiliary Battery
*c Hybrid Vehicle Control ECU

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

    GO TO STEP 5 Click here

    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

    END

    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. Clear the DTCs and freeze frame data.


      Powertrain > Hybrid Control > Clear DTCs

    5. 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
      Only P06881F is output A
      Other than above B

    5. Turn the power 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.
      Result
      Proceed to
      OK
      NG

    NG

    CONNECT SECURELY

    OK

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


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

      Tech Tips

      Click here

      B004P9FC01
      *A for LHD *B for RHD
      OK
      The connectors are connected securely and there are no contact pressure problems.
      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. 1 engine room relay block and No. 1 junction block assembly.

    2. Disconnect the A50 and F3 hybrid vehicle control ECU connectors.

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

      B004QMCC02
      *1 No. 1 Engine Room Relay Block and No. 1 Junction Block Assembly *2 IGCT Relay
      *a

      Front view of wire harness connector

      (to Hybrid Vehicle Control ECU)

      		 - -
      Standard Resistance
      Tester Connection Condition Specified Condition
      A50-11 (+B1) - 5 (IGCT relay) Power switch off Below 1 Ω
      F3-1 (+B2) - 5 (IGCT relay) Power switch off Below 1 Ω

    4. Reconnect the A50 and F3 hybrid vehicle control ECU connectors.

    5. Install the IGCT relay.

      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  8. CHECK FOR INTERMITTENT PROBLEMS


    1. Check for intermittent problems.

      Tech Tips

      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. 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 and the No. 1 engine room relay block and No. 1 junction block assembly.

      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