Problem Symptoms Table
HINT.
Use the table below to help determine the cause of the problem symptom. The potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed Replace parts as necessary
Power steering system:
PROBLEM SYMPTOMS CHART
| Symptom | Suspected Area | See Procedure |
|---|---|---|
| Steering is heavy | Front tires (Improperly inflated, unevenly worn) | FRONT WHEEL ALIGNMENT |
| Front wheel alignment (Incorrect) | FRONT WHEEL ALIGNMENT | |
| Front suspension (Lower ball joint) | INSPECTION | |
| Power steering gear assembly | REMOVAL | |
| "Steering column assembly | REMOVAL | |
| Auxiliary battery and power source system | DATA LIST / ACTIVE TEST | |
| Power source voltage of power steering ECU | TERMINALS OF ECU | |
| Power steering converter assembly | REMOVAL | |
| Power steering ECU | TERMINALS OF ECU | |
| Vehicle condition (The steering wheel is turned from left to right repeatedly with the vehicle stopped or a heavy load is continuously applied to the vehicle) | DATA LIST / ACTIVE TEST | |
| CAN communication system | CAN COMMUNICATION SYSTEM | |
| Steering effort differs between right and left or is uneven | Power steering ECU (Steering center point is not recorded correctly) | PROBLEM SYMPTOMS TABLE |
| Front tires (Improperly inflated, unevenly worn) | FRONT WHEEL ALIGNMENT | |
| Front wheel alignment (Incorrect) | FRONT WHEEL ALIGNMENT | |
| Front suspension (Lower ball joint) | INSPECTION | |
| Power steering gear assembly | REMOVAL | |
| Steering column assembly | REMOVAL | |
| Power steering ECU | TERMINALS OF ECU | |
| While driving, steering effort does not change in accordance with vehicle speed, or the steering wheel does not return to its centered position easily | Speed sensor | REMOVAL |
| Steering angle sensor | INSPECTION | |
| Front suspension (Lower ball joint) | INSPECTION | |
| Skid control ECU | TERMINALS OF ECU | |
| Power steering gear assembly | REMOVAL | |
| Power steering ECU | TERMINALS OF ECU | |
| CAN communication system | CAN COMMUNICATION SYSTEM | |
| Friction sounds occur when turning steering wheel during low speed driving | Power steering gear assembly | REMOVAL |
| Steering column assembly | DISASSEMBLY | |
| PS warning light remains on | PS warning light remains on | PS WARNING LIGHT REMAINS ON |
| A knocking (or cranking) sound occurs when turning the steering wheel back and forth while power steering is in operation | Power steering gear assembly | DISASSEMBLY |
| Steering column assembly | DISASSEMBLY |