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 tested and/or the donor vehicle

Verify the customer concern
Visually inspect for obvious signs of damage and system integrity

With the ignition on, check the operation of the audio output from the instrument cluster integrated speakers by operating the turn signal indicators (left and right) and verifying that audible feedback (a ticking sound) is present

VISUAL INSPECTION

MECHANICAL	ELECTRICAL
Fluid level(s) Accessory installations Check for stuck/jammed switches and buttons Visibly damaged or worn components Loose or missing fasteners	Fuse(s) Damage to wiring loom, incorrect location of wiring, wiring stretched or taught Loose or corroded electrical connector(s) Instrument cluster Central junction box Rear junction box Driver door module Passenger door module Engine control module Transmission control module

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