Diagnostic Aids

WARNING: This page does not describe the selected car, but rather 31 other vehicles, including the 2002 Saturn Vue, 2002 Pontiac Montana, 2002 Pontiac Aztek, 2002 Oldsmobile Silhouette, and 2002 Oldsmobile Bravada. However, it is still accessible from the selected car via links, so may be relevant.

Monitoring Fuel Injector circuit status with scan tool, while moving fuel injector harness, may help isolate an intermittent condition.
Performing Fuel Injector Coil test may help isolate an intermittent condition. See FUEL INJECTOR COIL TEST (2.2L SONOMA & S10 PICKUP) .
For an intermittent condition, go to INTERMITTENTS in TROUBLE SHOOTING - NO CODES - TRUCKS article.