DTC 27: Steering Angle Sensor Malfunction

NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see HOW TO USE THE HDS (HONDA DIAGNOSTIC SYSTEM) ).

Turn the ignition switch to ON (II).
Clear the DTC with the HDS.
Turn the ignition switch to LOCK (0).
Test-drive the vehicle around a number of corners.
NOTE: Drive the vehicle on the road, not on a lift.
Check for DTCs with the HDS.
Is DTC 27 indicated?

YES -Go to step 6.

NO -Intermittent failure, the system is OK at this time. Refer to INTERMITTENT FAILURES TROUBLESHOOTING .
Check the size, air pressure, and the amount of wear of all four tires.
Is the tire condition OK?

YES -Go to step 7.

NO -Replace the tires and/or adjust the air pressure, then recheck by test-driving.
Turn the ignition switch to LOCK (0).
Disconnect the steering angle sensor 5P connector. (see STEERING ANGLE SENSOR REPLACEMENT ).
Disconnect the VSA modulator-control unit 47P connector (see step 2).
Turn the ignition switch to ON (II).
Measure the voltage between body ground and VSA modulator-control unit 47P connector terminals No. 5 and No. 40 individually.

Fig 1: Measuring Voltage Between Body Ground And VSA Modulator-Control Unit 47P Connector Terminals No. 5 And No. 40 Individually
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there 0.1 V or more?

YES -Repair a short to power in the wire between the VSA modulator-control unit and the steering angle sensor.

NO -Go to step 12.
Measure the voltage between body ground and VSA modulator-control unit 47P connector terminals No. 38, No. 41, and No. 30 individually.

Fig 2: Measuring Voltage Between Body Ground And VSA Modulator-Control Unit 47P Connector Terminals No. 38, No. 41, And No. 30
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there 0.1 V or more?

YES -Repair a short to power in the wire between the VSA modulator-control unit and the steering angle sensor.

NO -Go to step 13.
Turn the ignition switch to LOCK (0).
Check for continuity between body ground and VSA modulator-control unit 47P connector terminals No. 5 and No. 40 individually.

Fig 3: Checking For Continuity Between Body Ground And VSA Modulator-Control Unit 47P Connector Terminals No. 5 And No. 40
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES -Repair a short to body ground in the wire between the VSA modulator-control unit and the steering angle sensor.

NO -Go to step 15.
Check for continuity between body ground and VSA modulator-control unit 47P connector terminals No. 38, No. 41, and No. 30 individually.

Fig 4: Checking For Continuity Between Body Ground And VSA Modulator-Control Unit 47P Connector Terminals No. 38, No. 41, And No. 30
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES -Repair a short to body ground in the wire between the VSA modulator-control unit and the steering angle sensor.

NO -Go to step 16.

Check for continuity between VSA modulator-control unit 47P connector terminal and steering angle sensor 5P connector terminal individually (see chart below).

Sign	VSA Modulator-Control Unit 47P Connector Terminal	Steering Angle Sensor 5P Connector Terminal
SVCC	No. 5	No. 5
SGND	No. 1	No. 40

Fig 5: Checking For Continuity Between VSA Modulator-Control Unit 47P Connector Terminal And Steering Angle Sensor 5P Connector Terminal

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES -Go to step 17.

NO -Repair an open in the wire between the VSA modulator-control unit and the steering angle sensor.

Check for continuity between VSA modulator-control unit 47P connector terminal and steering angle sensor 5P connector terminal individually (see chart below).

Sign	VSA Modulator-Control Unit 47P Connector Terminal	Steering Angle Sensor 5P Connector Terminal
STR-A	No. 41	No. 2
STR-B	No. 38	No. 4
STR-Z	No. 30	No. 3

Fig 6: Checking For Continuity Between VSA Modulator-Control Unit 47P Connector Terminal And Steering Angle Sensor 5P Connector Terminal

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES -Go to step 18.

NO -Repair an open in the wire between the VSA modulator-control unit and the steering angle sensor.

Check the wheel alignment (see WHEEL ALIGNMENT ).
Is the wheel alignment OK?

YES -Go to step 19.

NO -Make sure the suspension is not modified, and the steering rack is centered. Then correct the wheel alignment, and recheck by test-driving.
Substitute a known-good steering angle sensor (see STEERING ANGLE SENSOR REPLACEMENT ).
NOTE: Make sure the steering angle sensor and combination switch is mounted properly.
Reconnect all connectors.
Turn the ignition switch to ON (II).
Clear the DTC with the HDS.
Turn the ignition switch to LOCK (0).
Test-drive the vehicle around a number of corners.
NOTE: Drive the vehicle on the road, not on a lift.
Check for DTCs with the HDS.
Is DTC 27 indicated?

YES -Go to step 26.

NO -Check for loose terminals in the steering angle sensor 5P connector. If the connections are OK, replace the steering angle sensor (see STEERING ANGLE SENSOR REPLACEMENT ).
Update the VSA modulator-control unit if it does not have the latest software (see VSA MODULATOR-CONTROL UNIT UPDATE ).
Turn the ignition switch to LOCK (0).
Test-drive the vehicle around a number of corners.
NOTE: Drive the vehicle on the road, not on a lift.
Check for DTCs with the HDS.
Is DTC 27 indicated?

YES -Check for loose terminals in the VSA modulator-control unit 47P connector. If the VSA modulator-control unit was updated and the symptom/indication is still present, replace the VSA modulator-control unit (see VSA MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION ).

NO -If the VSA modulator-control unit was updated, troubleshooting is complete. If any other DTCs are indicated, go to the indicated DTCS TROUBLESHOOTING .