HYBRID CONTROL SYSTEM, Diagnostic DTC:P310715

DTC Code DTC Name
P310715 Lost Communication with Airbag System Control Module Circuit Short to Auxiliary Battery or Open

DESCRIPTION

Refer to the description for DTC P310711.

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DTC No. Detection Item DTC Detection Condition Trouble Area MIL Warning Indicate
P310715 Lost Communication with Airbag System Control Module Circuit Short to Auxiliary Battery or Open

Open or short to +B in the communication circuit

Communication from the airbag ECU assembly stopped and Circuit High has been detected for a certain period.

(1 trip detection logic)

  • Wire harness or connector

  • Airbag ECU assembly

  • Hybrid vehicle control ECU

 Does not come on

Master Warning Light:

Comes on
Related Data List
DTC No. Data List
P310715 Airbag Status (Collision)

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.

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  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. With power switch on (IG) and wait for 15 seconds or more.

  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

Refer to the wiring diagram for DTC P310711.

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PROCEDURE


  1. CHECK DTC OUTPUT (SRS AIRBAG)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Enter the following menus: Body Electrical / SRS Airbag / Trouble Codes.

    4. Check for DTCs.


      Body Electrical > SRS Airbag > Trouble Codes
      Result
      Result Proceed to
      DTCs are not output A
      DTCs are output B

    5. Turn the power switch off.


    B

    GO TO DTC CHART (AIRBAG SYSTEM) Click here

    A

  2. CHECK AIRBAG ECU ASSEMBLY (CHECK WAVEFORM)


    1. Connect an oscilloscope between the airbag ECU assembly terminals specified in the table below.

    2. Turn the power switch on (READY).

    3. Measure the waveform.

      B004OHVC01
      *A w/o Passenger Airbag ON/OFF Indicator *B w/ Passenger Airbag ON/OFF Indicator
      *a

      Component with harness connected

      (Airbag ECU Assembly)

      		 - -
      Item Contents
      Terminal F56-14 (GSW2) - F56-25 (E1)
      Equipment Setting 5 V/DIV., 500 ms./DIV.
      Condition Power switch on (READY)
      Result
      Result Proceed to
      The waveform appears as shown in the illustration. A
      The waveform differs from the one shown in the illustration. B

    4. Turn the power switch off.


    B

    CHECK CONNECTOR CONNECTION CONDITION (HYBRID VEHICLE CONTROL ECU CONNECTOR) Click here

    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
      P310715 is not output A
      P310715 is output B

    5. Turn the power switch off.


    B

    REPLACE HYBRID VEHICLE CONTROL ECU Click here

    A

  5. CHECK FOR INTERMITTENT PROBLEMS

    Tech Tips

    Click here

    Result
    Proceed to
    OK
    NG

    OK

    REPLACE HYBRID VEHICLE CONTROL ECU Click here

    NG

    REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA

  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 CONNECTOR CONNECTION CONDITION (AIRBAG ECU ASSEMBLY CONNECTOR)


    1. Check the connector connections and contact pressure of the relevant terminals for the F56 airbag ECU assembly connector.

      Tech Tips

      Click here

      B004ON3C01
      *A w/o Passenger Airbag ON/OFF Indicator *B w/ Passenger Airbag ON/OFF Indicator
      *a

      Component with harness connected

      (Airbag ECU Assembly)

      		 - -
      OK
      The connectors are connected securely and there are no contact pressure problems.
      Result
      Proceed to
      OK
      NG

    NG

    CONNECT SECURELY

    OK

  8. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - AIRBAG ECU ASSEMBLY)


    1. Disconnect the F3 hybrid vehicle control ECU connector.

    2. Disconnect the F56 airbag ECU assembly connector.

    3. Turn the power switch on (IG).

    4. Measure the voltage according to the value(s) in the table below.

      B004PCSC01
      *A w/o Passenger Airbag ON/OFF Indicator *B w/ Passenger Airbag ON/OFF Indicator
      *a

      Front view of wire harness connector

      (to Hybrid Vehicle Control ECU)

      		 *b

      Rear view of wire harness connector

      (to Airbag ECU Assembly)
      Standard Voltage
      Tester Connection Condition Specified Condition
      F3-29 (ABFS) - Body ground Power switch on (IG) Below 1 V

      Note

      Turning the power switch on (IG) with the airbag sensor assembly connector and the hybrid vehicle control ECU connector disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.

    5. Turn the power switch off.

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

      Standard Resistance (Check for Open)
      Tester Connection Condition Specified Condition
      F3-29 (ABFS) - F56-14 (GSW2) Power switch off Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      F3-29 (ABFS) or F56-14 (GSW2) - Body ground and other terminals Power switch off 10 kΩ or higher

    7. Reconnect the F56 airbag ECU assembly connector.

    8. Reconnect the F3 hybrid vehicle control ECU connector.

      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  9. CHECK HYBRID VEHICLE CONTROL ECU


    1. Disconnect the F56 airbag ECU assembly connector.

    2. Turn the power switch on (IG).

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

      B004OOZC45
      *a

      Component with harness connected

      (Hybrid Vehicle Control ECU)

      		 - -

      Note

      Turning the power switch on (IG) with the airbag ECU assembly connector disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.

      Standard Voltage
      Tester Connection Condition Specified Condition
      F3-29 (ABFS) - Body ground Power switch on (IG) 11 to 14 V

    4. Turn the power switch off.

    5. Reconnect the F56 airbag ECU assembly connector.

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE AIRBAG ECU ASSEMBLY Click here

    NG

    REPLACE HYBRID VEHICLE CONTROL ECU Click here