Tech Tips
Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, 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.
Inspect the fuses and relays related to this system before inspecting the suspected areas below.
| Symptom | Suspected Area | Link |
|---|---|---|
| Steering is heavy (for 2WD) | Front tires (Improperly inflated, unevenly worn) | |
| Front wheel alignment (Incorrect) | ||
| Front suspension (Front lower suspension arm) | ||
| Front suspension (Steering knuckle) | ||
| Torque sensor, power steering motor (Rack and pinion power steering gear assembly) | ||
| Steering column assembly | ||
| Battery and power source circuit | for 8GR-FKS: Click here for V35A-FTS: Click here |
|
| Power source voltage of power steering ECU | ||
| Vehicle condition (Steering wheel is turned from left to right repeatedly with vehicle stopped or heavy load is continuously applied to vehicle) | ||
| CAN communication system | ||
| Power steering ECU (Rack and pinion power steering gear assembly) | ||
| Steering is heavy (for AWD) | Front tires (Improperly inflated, unevenly worn) | |
| Front wheel alignment (Incorrect) | ||
| Front suspension (Front lower suspension arm) | ||
| Torque sensor, power steering motor (Rack and pinion power steering gear assembly) | ||
| Steering column assembly | ||
| Battery and power source circuit | for 8GR-FKS: Click here for V35A-FTS: Click here |
|
| Power source voltage of power steering ECU | ||
| Vehicle condition (Steering wheel is turned from left to right repeatedly with vehicle stopped or heavy load is continuously applied to vehicle) | ||
| CAN communication system | ||
| Power steering ECU (Rack and pinion power steering gear assembly) | ||
| Steering effort differs between right and left or is uneven (for 2WD) | Rotation angle sensor initialization and torque sensor zero point calibration incomplete | |
| Front tires (Improperly inflated, unevenly worn) | ||
| Front wheel alignment (Incorrect) | ||
| Front suspension (Front lower suspension arm) | ||
| Front suspension (Steering knuckle) | ||
| Torque sensor, motor rotation angle sensor, power steering motor (Rack and pinion power steering gear assembly) | ||
| Steering column assembly | ||
| Power steering ECU (Rack and pinion power steering gear assembly) | ||
| Steering effort differs between right and left or is uneven (for AWD) | Rotation angle sensor initialization and torque sensor zero point calibration incomplete | |
| Front tires (Improperly inflated, unevenly worn) | ||
| Front wheel alignment (Incorrect) | ||
| Front suspension (Front lower suspension arm) | ||
| Torque sensor, motor rotation angle sensor, power steering motor (Rack and pinion power steering gear assembly) | ||
| Steering column assembly | ||
| Power steering ECU (Rack and pinion power steering gear assembly) | ||
| While driving, steering effort does not change in accordance with vehicle speed, or steering wheel does not return to its centered position easily (for 2WD) | Front suspension (Front lower suspension arm) | |
| Front suspension (Steering knuckle) | ||
| Speed sensor | w/ Vacuum Breake Booster: Click here w/o Vacuum Breake Booster: Click here |
|
| Skid control ECU (Brake actuator assembly) | for LHD with Vacuum Breake Booster: Click here for RHD with Vacuum Breake Booster: Click here |
|
| Skid control ECU | w/o Vacuum Breake Booster: Click here |
|
| Torque sensor, motor rotation angle sensor, power steering motor (Rack and pinion power steering gear assembly) | ||
| CAN communication system | ||
| Power steering ECU (Rack and pinion power steering gear assembly) | ||
| While driving, steering effort does not change in accordance with vehicle speed, or steering wheel does not return to its centered position easily (for AWD) | Front suspension (Front lower suspension arm) | |
| Speed sensor | w/ Vacuum Breake Booster: Click here w/o Vacuum Breake Booster: Click here |
|
| Skid control ECU (Brake actuator assembly) | for LHD with Vacuum Breake Booster: Click here for RHD with Vacuum Breake Booster: Click here |
|
| Skid control ECU | w/o Vacuum Breake Booster: Click here |
|
| Torque sensor, motor rotation angle sensor, power steering motor (Rack and pinion power steering gear assembly) | ||
| CAN communication system | ||
| Power steering ECU (Rack and pinion power steering gear assembly) | ||
| Knocking (or cranking) sound occurs when turning steering wheel back and forth while power steering is operating (for 2WD) | No. 2 steering intermediate shaft assembly (w/o VGRS) | |
| Steering actuator assembly (w/ VGRS) | ||
| Steering sliding with shaft yoke sub-assembly | ||
| Rack and pinion power steering gear assembly | ||
| Knocking (or cranking) sound occurs when turning steering wheel back and forth while power steering is operating (for AWD) | No. 2 steering intermediate shaft assembly | |
| Rack and pinion power steering gear assembly | ||
| Friction sounds occur when turning steering wheel during low speed driving (for 2WD) | Power steering motor (Rack and pinion power steering gear assembly) | |
| Steering column assembly | ||
| Friction sounds occur when turning steering wheel during low speed driving (for AWD) | Power steering motor (Rack and pinion power steering gear assembly) | |
| Steering column assembly | ||
| High-pitched sound (squeaking) occurs when turning steering wheel slowly with vehicle stopped (for 2WD) | Power steering motor (Rack and pinion power steering gear assembly) | |
| High-pitched sound (squeaking) occurs when turning steering wheel slowly with vehicle stopped (for AWD) | Power steering motor (Rack and pinion power steering gear assembly) | |
| Steering wheel vibrates and noise occurs when turning steering wheel from lock to lock (for 2WD) | Power steering motor (Rack and pinion power steering gear assembly) | |
| Steering column assembly | ||
| Steering wheel vibrates and noise occurs when turning steering wheel from lock to lock (for AWD) | Power steering motor (Rack and pinion power steering gear assembly) | |
| Steering column assembly |