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Home >> Mazda >> 2002 >> Tribute LX, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 468 (Symptom Troubleshooting [Electronic Power Steering System]) >> No.3 Power Assist Differs Between Right And Left Turns >> Diagnostic procedure

Diagnostic procedure

WARNING: This page is about a different car, the 2005 Mazda RX-8. However, it is still accessible from the selected car via links, so may be relevant.
NO 3 DIAGNOSTIC PROCEDURE

STEP INSPECTION ACTION
1 INSPECT FOR DTC IN EPS CONTROL MODULE 
  • Have DTCs been recorded in the memory?
 Yes Perform inspection using the appropriate DTC, then go to Step 3.
No Go to the next step.
2 INSPECT STEERING WHEEL POWER ASSIST 
  • Disconnect the EPS motor connector.
  • Inspect the steering wheel power assist.
  • Is there a difference in the steering wheel power assist between right and left turns?
 Yes Inspect the steering gear and linkage. If it is abnormal, replace it.
(See STEERING GEAR AND LINKAGE REMOVAL/INSTALLATION .)
No Go to the next step.
3 INSPECT TORQUE SENSOR AND EPS MOTOR 
  • Inspect the following items:
    • Measure the resistance of the torque sensor.

      Resistance: 12-15 ohms 

    • Inspect the operating condition of the EPS motor.
  • Are they normal?
 Yes Inspect the torque sensor wiring harness and the EPS motor wiring harness. If they are normal, replace the EPS control module.
(See EPS CONTROL MODULE REMOVAL/INSTALLATION .)
No Replace the steering gear and linkage.
(See STEERING GEAR AND LINKAGE REMOVAL/INSTALLATION .)
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