With Scan Tool

NOTE: Using this procedure, the technician can attempt to recreate and detect an intermittent fault.

KEY ON ENGINE OFF

1. Ensure the ignition switch is in the OFF position and connect a scan tool to the diagnostic connector.
2. Turn the ignition key to the ON position.
3. ACTIVATE, DEACTIVATE, and REACTIVATE the self-test (refer to scan tool manual for instructions). You are now in the wiggle test mode.
4. Tap, move, and wiggle the suspected circuits sensors and wiring. When a fault is detected, the Electronic Control Assembly (ECA) will set a code and the scan tool will signal a fault (refer to scan tool owner's manual for signal).
NOTE: If any codes are set, perform the appropriate pinpoint test. Manufacturer Code Charts
5. To exit the wiggle test mode, DEACTIVATE the self test and turn the key OFF.

KEY ON ENGINE RUNNING

NOTE: The Engine Running (ER) wiggle test may be entered any time the engine is running.

1. Ensure the ignition switch is in the OFF position and connect a scan tool to the diagnostic connector.
2. START the engine, then ACTIVATE, DEACTIVATE, and REACTIVATE the self test. You are now in the engine running wiggle test mode.
NOTE: Do not turn the engine OFF.
3. Tap, move, and wiggle the suspected circuits sensors and wiring. When a fault is detected, ECA will set a code and the scan tool will signal a fault (refer to scan tool owner's manual for signal).
NOTE: If any codes are set, perform the appropriate pinpoint test. Manufacturer Code Charts
4. To exit the wiggle test mode, DEACTIVATE the self test and turn the key OFF.