DTC 71-01: Motor Angle Sensor (SIN/COS Signals); DTC 71-03: Motor Angle Sensor (SIN/COS Signals)
- Turn the ignition switch to ON (II).
- Clear the DTC with the HDS.
- Turn the ignition switch to LOCK (0).
- Start the engine.
- Turn the steering wheel to the right or left, and wait at least 10 seconds.
- Check for DTCs with the HDS.
Is DTC 71-01 or 71-03 indicated?
YES -Go to step 7.
NO -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the EPS control unit.
- Turn the ignition switch to LOCK (0).
- Disconnect EPS control unit connector B (16P) (see step 3 ).
- Measure the resistance between following terminals of EPS control unit connector B (16P).
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is the resistance between R1-R2:13.5-17.5 Ω, S1-S3:25-32 Ω, and S2-S4:25-32 Ω?
YES -Go to step 10.
NO -Go to step 13.
- Check for continuity between body ground and EPS control unit connector B (16P) terminals No. 4, No. 5, No. 6, No. 7, No. 8, and No. 10 individually.Fig 2: Checking Continuity Between Body Ground And EPS Control Unit Connector B (16P) Terminals No. 4, No. 5, No. 6, No. 7, No. 8, And No. 10
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is there continuity?
YES -Go to step 11.
NO -Check for loose terminals in the EPS control unit connectors, and repair if necessary. If no poor connections are found, replace the EPS control unit (see EPS CONTROL UNIT REMOVAL/INSTALLATION ).
- Disconnect the EPS motor angle sensor 8P connector (see step 19 ).
- On the sensor side, check for continuity between body ground and EPS motor angle sensor 8P connector terminals No. 2, No. 3, No. 4, No. 6, No. 7, and No. 8 individually.Fig 3: Checking Continuity Between Body Ground And EPS Motor Angle Sensor 8P Connector Terminals No. 2, No. 3, No. 4, No. 6, No. 7, And No. 8
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is there continuity?
YES -Replace the EPS motor (see EPS MOTOR REMOVAL AND INSTALLATION ). Ω
NO -Repair short to body ground in the wire between the EPS control unit and the EPS motor angle sensor.
- Disconnect the EPS motor angle sensor 8P connector (see step 19 ).
- On the sensor side, measure the resistance between following terminals of EPS motor angle sensor 8P connector.
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is the resistance between R1-R2:13.5-17.5 Ω, S1-S3:25-32 Ω, and S2-S4:25-32 Ω?
YES -Repair an open or short in the wire between the EPS control unit and the EPS motor angle sensor.
NO -Replace the EPS motor (see EPS MOTOR REMOVAL AND INSTALLATION ).