6C-9 Power Assisted Steering System:
P/S System Symptom Diagnosis
S4RS0A6304001
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: in
Section 6A” are all in good condition, check the following power steering system parts which may be a possible cause
for each symptom of the steering.
Condition Possible cause Correction / Reference Item
Steering wheel feels Steering wheel installed improperly Install steering wheel correctly.
heavy (Perform “Steering (twisted)
Force Check: ” before Poor performance of torque sensor Check torque sensor referring to “Torque
diagnosis.) Sensor Inspection: ”.
Poor performance of motor Check motor referring to “Motor Assembly
Inspection: ”.
Steering gear case assembly faulty Replace.
Poor performance of VSS Check VSS referring to “DTC P0500: Vehicle
Speed Sensor (VSS) Malfunction: in Section
1A”.
Vehicle pulls to one side Poor performance of torque sensor Check torque sensor referring to “Torque
during straight driving Sensor Inspection: ”.
Poor recovery after turns Poor performance of torque sensor Check torque sensor referring to “Torque
Sensor Inspection: ”.
Steering column faulty Replace.
Serial Data Link Circuit Check
S4RS0A6304012
CAUTION:
Be sure to perform “EPS System Check: ” before starting “Troubleshooting”.