Expedition 4WD V8-4.6L SOHC VIN W (1999)
Audible Warning Device: Initial Inspection and Diagnostic Overview
1. Verify the customer concern.
2. Visually inspect for obvious signs of mechanical and electrical damage.
VISUAL INSPECTION CHART
Mechanical
^
Key-in-ignition/key position warning switch
^
Door open warning lamp switch
^
Safety belt warning indicator switch
^
Headlamp
^
Low washer fluid
^
4x4 indicator lamp
Electrical
^
Fuse(s)
^
Damaged wiring harness
^
Loose or corroded connections
^
Circuitry
3. If the concern remains after the inspection, connect New Generation STAR (NGS) Tester to the Data Link Connector (DLC) located beneath the
instrument panel and select the vehicle to be tested from the NGS menu. If NGS does not communicate with the vehicle:
^
Check that the program card is properly installed.
^
Check the connections to the vehicle.
^
Check the ignition switch position.
4. If NGS Tester still does not communicate with the vehicle, refer to the New Generation STAR Tester manual.
5. Perform the DATA LINK DIAGNOSTIC TEST. If NGS Tester responds with:
^
CKT914, CKT915 or CKT70= ALL ECUS NO RESP/NOT EQUIP, refer to Information Bus.
^
NO RESP/NOT EQUIP for GEM, go to Pinpoint Test G. See: Pinpoint Tests/G: No Communication With Generic Electronic Module (GEM)
^
SYSTEM PASSED, retrieve and record the continuous diagnostic trouble codes (DTCs),erase the continuous DTCs and perform self-test
diagnostics for the GEM.
6. If the DTCs retrieved are related to the concern, go to GEM Diagnostic Trouble Code (DTC) Index to continue diagnostics. See: Diagnostic
Trouble Code Descriptions
7. If no DTCs related to the concern are retrieved,proceed to Symptom Chart to continue diagnostics. See: Symptom Related Diagnostic Procedures
