Engine Running (KOER) Wiggle Test Procedure
Wiggle Test is entered by starting, stopping, and restarting a regular KOER self-test.
Connect test equipment. In this article, see STEP 2.0: VEHICLE PREP & EQUIPMENT HOOKUP . Wait 10 seconds with the ignition key Off. Start the engine. Activate self-test. See STEP 5.0: PERFORM ENGINE RUNNING (KOER) SELF-TEST .
Wait 10 seconds, deactivate, and then reactivate self-test. DO NOT shut the engine off.
You are now in Continuous Monitor (Wiggle Test) mode. Tap, move, and wiggle the suspected sensor and/or harness area.
If a fault is detected, a service code will be stored in memory. This will be indicated as follows, depending on the type of equipment being used:
- STAR Tester: Red LED lights and/or continuous tone.
- "CHECK ENGINE" Or "SERVICE ENGINE SOON" Light: Lights.
- VOM: Needle sweep.
- Scan Tool: As described by scan tool manufacturer.
Record or retrieve code and perform test indicated in: