HYBRID CONTROL SYSTEM, Diagnostic DTC:P310711

DTC Code DTC Name
P310711 Lost Communication with Airbag System Control Module Circuit Short to Ground

DESCRIPTION

The hybrid vehicle control ECU detects a problem in the collision signal line from the airbag ECU assembly and alerts the driver.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Warning Indicate
P310711 Lost Communication with Airbag System Control Module Circuit Short to Ground

Short to ground in the communication circuit:

Communication from the airbag ECU assembly stopped and Circuit Low 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
P310711 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.

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. With power switch on (IG) and wait for 2 minutes 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

B004Q4OE71
*1 Airbag ECU Assembly
*2 Hybrid Vehicle Control ECU

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 AIRBAG ECU ASSEMBLY 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
      P310711 is not output A
      P310711 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 AIRBAG ECU ASSEMBLY


    1. Disconnect the F56 airbag ECU assembly connector.

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

      B004Q3VC01
      *A w/o Passenger Airbag ON/OFF Indicator *B w/ Passenger Airbag ON/OFF Indicator
      *a

      Component without harness connected

      (Airbag ECU Assembly)

      		 - -
      Standard Resistance
      Tester Connection Condition Specified Condition
      F56-14 (GSW2) - F56-25 (E1) Power switch off 10 kΩ or higher

    3. Reconnect the F56 airbag ECU assembly connector.

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE AIRBAG ECU ASSEMBLY Click here

    OK

  7. 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. Measure the resistance 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 Resistance
      Tester Connection Condition Specified Condition
      F3-29 (ABFS) or F56-14 (GSW2) - Body ground and other terminals Power switch off 10 kΩ or higher

    4. Reconnect the F56 airbag ECU assembly connector.

    5. Reconnect the F3 hybrid vehicle control ECU connector.

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE HYBRID VEHICLE CONTROL ECU Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR