Without 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.
2. Turn the ignition key to the ON position.

Jumper Wire Installed Between Pin #2 And Self Test Input (STI):

3. ACTIVATE, DEACTIVATE, and REACTIVATE the self-test by grounding, ungrounding, and re-grounding the STI connector. You are now in the wiggle test mode.
4. Tap, move, and wiggle the suspected circuits sensors and wiring. When a fault is detected, ECA will set a code and signal a fault by flashing the CHECK ENGINE light..
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.
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 signal a fault.
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.