Navigator 4WD V8-5.4L SOHC VIN L (1998)
Information Bus: Flow of Diagnosis
1. Verify the customer concern by operating the system in question.
2. Visually inspect for obvious signs of electrical damage.
VISUAL INSPECTION CHART
Electrical
^
Fuse(s)
^
Damaged wiring harness
^
Loose or corroded connections
^
Four-Wheel Anti-lock Brake System (4WABS) module
^
Electronic Automatic Temperature Control (EATC) module
^
Driver Seat Module (DSM)
^
Remote Anti-theft Personality (RAP) module
^
Generic Electronic Module (GEM)
^
Integrated Air Bag Module (IABM)
^
Powertrain Control Module (PCM)
^
Four-Wheel Air Suspension Module (4WAS)
^
Anti-lock brake control module
^
Passive Anti-Theft System (PATS) module
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 NGS Tester menu. If NGS Tester 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.
If NGS Tester still does not communicate with the vehicle, go to Pinpoint Test M. See: Pinpoint Tests/M : No Module/Network Communication
Go to Pinpoint Test PC. See: Initial Inspection and Diagnostic Overview/System Precheck