Inspection And Verification

CAUTION: Diagnosis by substitution from a donor vehicle is NOT acceptable. Substitution of control modules does not guarantee confirmation of a fault and may also cause additional faults in the vehicle being checked and/or the donor vehicle.

NOTE: Check and rectify basic faults before beginning diagnostic routines involving pinpoint tests.

Verify the customer concern.
- If a road test is necessary make sure the vehicle is safe to do so.

Visually inspect for obvious signs of mechanical or electrical damage.

VISUAL INSPECTION

Mechanical	Electrical
Check the tires for correct pressure, size and tread pattern Check for wheel rim and tire damage Check road wheel security Check the power steering fluid level and the hydraulic circuit for oil leaks Check the power steering pump drive belt condition and tension Check the power steering pump for security, wear, damage and excessive noise Check the steering gear assembly for damage, wear and security Check the hydraulic pipes and cooler lines for damage and correct routing Check the steering joints for damage, excessive play, wear and security Check the steering column and joints for damage, excessive play, wear and security	Steering Angle Sensor Module (SASM) and circuits Controller Area Networks (CAN) circuits

Mechanical

Electrical

Check the tires for correct pressure, size and tread pattern
Check for wheel rim and tire damage
Check road wheel security
Check the power steering fluid level and the hydraulic circuit for oil leaks
Check the power steering pump drive belt condition and tension
Check the power steering pump for security, wear, damage and excessive noise
Check the steering gear assembly for damage, wear and security
Check the hydraulic pipes and cooler lines for damage and correct routing
Check the steering joints for damage, excessive play, wear and security
Check the steering column and joints for damage, excessive play, wear and security

Steering Angle Sensor Module (SASM) and circuits
Controller Area Networks (CAN) circuits

If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
If the cause is not visually evident, verify the symptom and refer to the Symptom Chart, alternatively check for Diagnostic Trouble Codes (DTCs) and refer to the DTC Index.