Inspection and Verification (Start Testing Here)

1. Verify the customer concern by operating the system in question.
2. Check for obvious mechanical or electrical damage.

VISUAL INSPECTION CHART

Mechanical
^ Damaged engine oil filter
^ Damaged oil pump
^ Damaged Vehicle Speed Sensor (VSS) gear
^ Misadjusted door
^ Low engine oil level
^ Stuck coolant temperature gauge needle
^ Stuck oil pressure gauge needle
^ Tripped inertia fuel shutoff switch
^ Binding/damaged low washer fluid level switch
^ Low washer fluid level

Electrical
^ Blown fuse(s)
^ Damaged miniature bulbs
^ Damaged wiring harness
^ Loose or corroded connections
^ Damaged VSS
^ Damaged instrument cluster
^ Loose, corroded, damaged or missing ground straps

3. Verify that the following systems are working properly:
^ Charging system.
^ Fuel system.
^ Safety belt warning chime.
^ Turn signals.
^ Headlamps.
^ Anti-theft system.

4. Check the wiring harness for obvious signs of shorts, opens, bad connections, or damage.
5. 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.

6. If NGS still does not communicate with the vehicle, REFER to the New Generation STAR Tester manual.
7. Perform the DATA LINK DIAGNOSTIC TEST. If NGS responds with:
^ CKT914, CKT915 or CKT70 = ALL ECUS NO RESP/NOT EQUIP, REFER to Module Communications Network.
^ NO RESP/NOT EQUIP for Generic Electronic Module (GEM), go to Pinpoint Test AG. AG: No Communication With The 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.

8. If the DTCs retrieved are related to the concern, go to GEM Diagnostic Trouble Code (DTC) Index to continue diagnostics. Diagnostic Trouble Code Tests and Associated Procedures
9. If no DTCs related to the concern are retrieved, proceed to Symptom Chart to continue diagnostics. Symptom Related Diagnostic Procedures