Initial Inspection and Diagnostic Overview

INSPECTION AND VERIFICATION

1. Verify the customer concern by operating the system.
2. Visually inspect for obvious signs of mechanical or electrical damage.

VISUAL INSPECTION CHART

Mechanical
- Dust Leaks
- Water Leaks

3. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
4. If the concern is not visually evident, verify the symptom and refer to the Symptom Chart. Symptom Related Diagnostic Procedures

Dust and Water Leaks
Sealer locations should be considered when checking for dust or water leaks. The forward motion of the vehicle causes any unsealed small opening in the lower section of the body to permit air and dust to be drawn into the body. Opening the ventilator air ducts will equalize these pressures. Dust accumulates in the luggage compartment body opening and may move into the luggage compartment.
To eliminate dust leakage, determine the exact point at which the dust enters. Under certain conditions, water may also enter the body at any point where dust can enter.

To determine the exact location of a dust leak, it may be necessary to remove the following trim panels from the vehicle:
- Scuff plate. REFER to Interior Trim.
- C-Pillar trim. REFER to Interior Trim.
- Rear seat backrest and frame, and rear seat cushion and frame. REFER to Seats.
- Luggage compartment floor covering
- Spare tire
- Roof opening panel. REFER to Sunroof/Moonroof.

After removing the trim panel (s), the location of most leaks will be evident. The entrance of dust is usually indicated by a point of dust or silt. Seal these leaks, then road test the vehicle on a dusty road to ensure all leaks are sealed. A suitable Leak Detector can locate dust leaks, wind and water leaks.

After the road test, check for indications of a dust pattern around the door openings. cowl side trim panel, lower part of the quarter panel and in the luggage compartment.

Sometimes leaks can be located by putting bright lights under the vehicle, with the above components removed, and checking the interior of the body joints and weld lines. A light will show through where leaks exist.