SFI SYSTEM, Diagnostic DTC:P158549, P158649

DTC Code DTC Name
P158549 Acceleration Sensor Circuit Internal Electronic Failure
P158649 Acceleration Sensor Circuit Range / Performance Internal Electronic Failure

DESCRIPTION

The yaw rate and acceleration sensor is built into the airbag sensor assembly. The airbag sensor assembly sends yaw rate and acceleration sensor signals to each ECU via CAN communication. These signals are used for the neutral control of the CVT system. If a yaw rate and acceleration sensor circuit malfunction signal, yaw rate and acceleration sensor stuck signal or abnormal sensor output signal is received from the skid control ECU, a DTC will be stored.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory Note
P158549 Acceleration Sensor Circuit Internal Electronic Failure Yaw rate and acceleration sensor circuit malfunction signal is received from the skid control ECU for 3 seconds or more (1 trip detection logic).

  • Airbag sensor assembly (yaw rate and acceleration sensor)

  • CAN communication system

  • Wire harness or connector

  • Brake actuator assembly (skid control ECU)

  • ECM

 Does not come on DTC stored

SAE Code:

P1585
P158649 Acceleration Sensor Circuit Range / Performance Internal Electronic Failure Yaw rate and acceleration sensor stuck signal or abnormal sensor output signal is received from the skid control ECU for 3 seconds or more (1 trip detection logic).

  • Airbag sensor assembly (yaw rate and acceleration sensor)

  • CAN communication system

  • Wire harness or connector

  • Brake actuator assembly (skid control ECU)

  • ECM

 Does not come on DTC stored

SAE Code:

P1586

CONFIRMATION DRIVING PATTERN


  1. Connect the GTS to the DLC3.

  2. Turn the ignition switch to ON and turn the GTS on.

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

  4. Turn the ignition switch off and wait for at least 30 seconds.

  5. Start the engine and turn the GTS on.

  6. Drive the vehicle while accelerating and decelerating repeatedly, for several minutes.

  7. Enter the following menus: Powertrain / Engine / Trouble Codes.

  8. Read the pending DTCs.

    Tech Tips


    • If a pending DTC is output, the system is malfunctioning.

    • If a pending DTC is not output, perform the following procedure.

  9. Enter the following menus: Powertrain / Engine / Utility / All Readiness.

  10. Input the DTC: P158549 or P158649.

  11. Check the DTC judgment result.

    GTS Display Description
    NORMAL

    • DTC judgment completed

    • System normal
    ABNORMAL

    • DTC judgment completed

    • System abnormal
    INCOMPLETE

    • DTC judgment not completed

    • Perform driving pattern after confirming DTC enabling conditions
    N/A

    • Unable to perform DTC judgment

    • Number of DTCs which do not fulfill DTC preconditions has reached ECU's memory limit

    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 the Confirmation Driving Pattern and check the DTC judgment result again.

WIRING DIAGRAM

Refer to DTC P158504.

Click here

CAUTION / NOTICE / HINT

Note


  • Perform initialization after replacing any parts related to the any system.

    Click here

  • Check that no DTCs are stored after performing initialization.

  • Inspect the fuses for circuits related to this system before performing the following procedure.

Tech Tips

Read freeze frame data using the GTS. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.

PROCEDURE


  1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P158549 OR P158649)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: System Select / Health Check.

    5. Read the DTCs.

      Result
      Result Proceed to
      DTC P158549 or P158649 is output A
      DTC P158549 or P158649 and other DTCs are output B

      Tech Tips


      • If any CAN communication system DTCs are output, perform troubleshooting for the CAN communication system first.

      • If any DTCs other than P158549 or P158649 are output, troubleshoot those DTCs first.


    B

    GO TO DTC CHART

    A

  2. INSPECT AIRBAG SENSOR ASSEMBLY (CHECK SENSOR INSTALLATION)


    1. Check the airbag sensor assembly (yaw rate and acceleration sensor) installation condition.

      Click here

      OK
      The airbag sensor assembly is not tilted and its installation bolts are tightened to the specified torque, the airbag sensor assembly bracket is not deformed and there are no foreign objects under the airbag sensor assembly.
      Result
      Proceed to
      OK
      NG

    NG

    REINSTALL OR REPLACE AIRBAG SENSOR ASSEMBLY Click here

    OK

  3. CHECK TERMINAL VOLTAGE (POWER SOURCE OF AIRBAG SENSOR ASSEMBLY)


    1. Disconnect the airbag sensor assembly (yaw rate and acceleration sensor) connector.

    2. Turn the ignition switch to ON.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      E14-21 (IG2) - Body ground Ignition switch ON 11 to 14 V

    4. Turn the ignition switch off.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      E14-25 (E1) - Body ground Always Below 1 Ω
      E14-26 (E2) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (AIRBAG SENSOR ASSEMBLY POWER SOURCE CIRCUIT)

    OK

  4. REPLACE AIRBAG SENSOR ASSEMBLY


    1. Replace the airbag sensor assembly (yaw rate and acceleration sensor).

      Click here

      Result
      Proceed to
      NEXT

    NEXT

    GO TO STEP 6 Click here

  5. REINSTALL OR REPLACE AIRBAG SENSOR ASSEMBLY


    1. Reinstall or replace the airbag sensor assembly (yaw rate and acceleration sensor).

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  6. PERFORM INITIALIZATION


    1. Perform the initialization.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  7. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED (DTC P158549 OR P158649)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Clear the DTCs.


      Powertrain > Engine > Clear DTCs

    5. Turn the ignition switch off and wait for at least 30 seconds.

    6. Turn the ignition switch to ON.

    7. Turn the GTS on.

    8. Start the engine and warm it up.

    9. Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.

    10. Enter the following menus: Powertrain / Engine / Trouble Codes.

    11. Read the DTCs.


      Powertrain > Engine > Trouble Codes
      Result
      Result Proceed to
      DTC P158549 or P158649 is output A
      DTCs are not output B

    B

    END

    A

  8. REPLACE BRAKE ACTUATOR ASSEMBLY (SKID CONTROL ECU)


    1. Replace the brake actuator assembly (skid control ECU).

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  9. PERFORM INITIALIZATION


    1. Perform the initialization.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  10. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED (DTC P158549 OR P158649)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Clear the DTCs.


      Powertrain > Engine > Clear DTCs

    5. Turn the ignition switch off and wait for at least 30 seconds.

    6. Turn the ignition switch to ON.

    7. Turn the GTS on.

    8. Start the engine and warm it up.

    9. Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.

    10. Enter the following menus: Powertrain / Engine / Trouble Codes.

    11. Read the DTCs.


      Powertrain > Engine > Trouble Codes
      Result
      Result Proceed to
      DTC P158549 or P158649 is output A
      DTCs are not output B

    A

    REPLACE ECM Click here

    B

    END