Diagnostic Tests: Notes

CAUTION: Perform all resistance and voltage tests with a Digital Volt-ohmmeter (DVOM) with minimum 10-megohm impedance, unless stated otherwise in test procedures. Ensure ignition switch is in OFF position when performing resistance tests.

NOTE: For component locations, see appropriate illustration in SYSTEM/COMPONENT TESTS article.

NOTE: For for identification of circuits, terminals and wire colors referenced in the following testing, see appropriate wiring diagram in SYSTEM WIRING DIAGRAMS article.

CAUTION: If ECM replacement is instructed in following testing, always ensure ECM harness connector and ground circuit are okay. If either are suspect, repair as necessary and repeat testing to confirm ECM malfunction.