P/S System Symptom Diagnosis
This section describes trouble diagnosis of the P/S system parts whose trouble is not indicated by the on-board diagnostic system (self-diagnostic function). When no malfunction is indicated by the on-board diagnostic system (self-diagnosis function) and assuredly those steering basic parts as described in STEERING SYMPTOM DIAGNOSIS are all in good condition, check the following power steering system parts which may be a possible cause for each symptom of the steering.
SYMPTOM DIAGNOSIS DESCRIPTION CHART
| Condition | Possible Cause | Action |
|---|---|---|
| Steering wheel feels heavy (Perform " STEERING FORCE CHECK :" before diagnosis.) | Steering wheel installed improperly (twisted) | Install steering wheel correctly . |
| Poor performance of P/S motor | Check P/S motor referring to MOTOR ASSEMBLY INSPECTION: ELECTRIC TYPE . | |
| Poor performance of torque sensor | Check torque sensor referring to TORQUE SENSOR AND ITS CIRCUIT INSPECTION: ELECTRIC TYPE . | |
| Steering gear case assembly malfunction | Replace steering gear case assembly . | |
| Poor performance of vehicle speed signal from BCM | Check vehicle speed signal circuit referring to DTC C1121/C1123/C1124: VEHICLE SPEED SIGNAL CIRCUIT FAILURE: ELECTRIC TYPE . | |
| Steering wheel feels heavy momentarily when turning it to the left or right | Steering gear case assembly malfunction | Replace steering gear case assembly . |
| Poor recovery from turns | Poor performance of torque sensor | Check torque sensor referring to TORQUE SENSOR AND ITS CIRCUIT INSPECTION: ELECTRIC TYPE . |
| Steering gear case assembly malfunction | Replace steering gear case assembly . | |
| Vehicle pulls to one side during straight driving | Poor performance of torque sensor | Check torque sensor referring to TORQUE SENSOR AND ITS CIRCUIT INSPECTION: ELECTRIC TYPE . |
| Steering gear case assembly malfunction | Replace steering gear case assembly . | |
| Abnormal noise | P/S motor (built in steering gear case assembly) malfunction | Replace steering gear case assembly . |
| No idle up | P/S control module faulty | Check P/S control module referring to INSPECTION OF P/S CONTROL MODULE AND ITS CIRCUITS: ELECTRIC TYPE . |