Noise Diagnosis - Front of Vehicle Air Inlet Screen to Windshield Itch

Symptom:

Itching sound from the bottom of the windshield.

Possible Cause:

The air inlet screen (2) is rubbing against the bottom edge of the windshield.

Diagnosis:

Remove the air inlet screen (2). Look for witness marks from the windshield on the air inlet screen (2).

Corrective Active:

1. Apply isolation (vinyl nitril foam or equivalent) to the inlet screen and windshield interface.
2. Add foam tape to the right and/or left side of the air inlet screen(s) (2).
3. Foam strips are to be installed 1.0 to 3.0 mm inboard from the glass interface edge of the inlet screen

•	A single (10 in x 1 in) foam strip added to the interference, may be sufficient.

•	Or, two strips may be required:

•	Foam strips are to butted together at the center where the left and right inlet screens interlock.

-	Right side foam strip length is 955 mm (37.60 in).

-	Left side foam strip length is 1055 mm (41.54 in).

Noise Diagnosis - Front of Vehicle Accelerator Control Cable Tap

Symptom

Tapping sound is heard coming from the instrument panel area.

Possible Cause

The accelerator control cable (1) is tapping against the cowl.

Diagnosis

Corrective Action

Re-route the cable. The rerouted cable (1) must provide a minimum of 3.0 mm (0.118 in) clearance to the cowl.

Noise Diagnosis - Front of Vehicle Cruise Control Servo Cable Tap

Symptom

Tapping sound is heard coming from the instrument panel.

Possible Cause

The cruise control servo cable (3) is tapping against the cowl.

Diagnosis

Corrective Action

Reposition the cable (3) on the brake booster (1). The cable clip (2) should be in the three o'clock position.