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Home >> Acura >> 2005 >> TL Standard >> Repair and Diagnosis >> Brakes >> Traction Control >> VSA (Vehicle Stability Assist) System >> DTC Troubleshooting >> DTC 27: Steering Angle Sensor

DTC 27: Steering Angle Sensor

NOTE: If DTC 64 is stored at the same time as DTC 27, troubleshoot DTC 64 first, then recheck for DTC 27.
  1. Clear the DTC using the HDS (see HOW TO CLEAR DTCS ).
  2. Disconnect the HDS from the 16P DLC.
  3. Turn the ignition switch OFF, then turn it ON (II) again.
  4. Test-drive the vehicle around a number of corners.
  5. Verify the DTC.

    Is DTC 27 indicated? 

    1. YES  - Go to step  6.
    2. NO  - The system is OK at this time.
  6. Turn the ignition switch OFF.
  7. Disconnect the VSA modulator-control unit 47P connector, steering angle sensor 5P connector, and yaw rate-lateral acceleration sensor 5P connector.
  8. Turn the ignition switch ON (II).
  9. Measure the voltage between body ground and the VSA modulator-control unit 47P connector terminal No. 33 and No. 35 individually.
    Fig 1: Measuring Voltage Between Body Ground & VSA Modulator-Control Unit 47P Connector Terminal No. 33 & No. 35 Individually
    G03661385Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there 0.1 V or more? 

    1. YES  - Repair short to power in the wire between the VSA modulator-control unit, the steering angle sensor, and the yaw rate-lateral acceleration sensor.
    2. NO  - Go to step  10.
  10. Measure the voltage between body ground and the VSA modulator-control unit 47P connector terminal No. 28, No. 29, and No. 43 individually.
    Fig 2: Measuring Voltage Between Body Ground & VSA Modulator-Control Unit 47P Connector Terminal No. 28, No. 29 & No. 43 Individually
    G03661386Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there 0.1 V or more? 

    1. YES  - Repair short to power in the wire between the VSA modulator-control unit, the steering angle sensor, and the yaw rate-lateral acceleration sensor.
    2. NO  - Go to step  11.
  11. Turn the ignition switch OFF.
  12. Check for continuity between body ground and the VSA modulator-control unit 47P connector terminal No. 33 and No. 35 individually.
    Fig 3: Checking Continuity Between Body Ground & VSA Modulator-Control Unit 47P Connector Terminal No. 33 & No. 35 Individually
    G03661387Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    1. YES  - Repair short to body ground in the wire between the VSA modulator-control unit, the steering angle sensor, and the yaw rate-lateral acceleration sensor.
    2. NO  - Go to step  13.
  13. Check for continuity between body ground and the VSA modulator-control unit 47P connector terminal No. 28, No. 29, and No. 43 individually.
    Fig 4: Checking Continuity Between Body Ground & VSA Modulator-Control Unit 47P Connector Terminal No. 28, No. 29 & No. 43 Individually
    G03661388Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    1. YES  - Repair short to body ground in the wire between the VSA modulator-control unit, the steering angle sensor, and the yaw rate-lateral acceleration sensor.
    2. NO  - Go to step  14.
  14. Check for continuity between the VSA modulator-control unit 47P connector terminal No. 33, No. 35 and steering angle sensor 5P connector terminal No. 1, No. 5 respectively.
    Fig 5: Checking Continuity VSA Modulator-Control Unit 47P Connector Terminal No. 33, No. 35
    G03661389Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    1. YES  - Go to step  15.
    2. NO  - Repair open in the wire between the VSA modulator-control unit and the steering angle sensor.
  15. Check for continuity between the VSA modulator-control unit 47P connector terminal No. 28, No. 29, No. 43 and steering angle sensor 5P connector terminal No. 2, No. 3, No. 4 respectively.
    Fig 6: Checking Continuity VSA Modulator-Control Unit 47P Connector Terminal No. 28, No. 29, No. 43
    G03661390Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    1. YES  - Go to step  16.
    2. NO  - Repair open in the wire between the VSA modulator-control unit and the steering angle sensor.
  16. Substitute a known-good steering angle sensor.
  17. Reconnect all of the disconnected connectors.
  18. Clear the DTC using the HDS (see HOW TO CLEAR DTCS ).
  19. Disconnect the HDS from the 16P DLC.
  20. Turn the ignition switch OFF, then turn it ON (II) again.
  21. Test-drive the vehicle around a number of corners.
  22. Verify the DTC.

    Is DTC 27 indicated? 

    1. YES  - Check for loose terminals in the VSA modulator-control unit 47P connector and the steering angle sensor 5P connector, and repair if necessary. If no poor connections are found, replace the VSA modulator-control unit (see VSA MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION ).
    2. NO  - Replace the original steering angle sensor (see STEERING ANGLE SENSOR REPLACEMENT ).
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