Diagnostic Aids
WARNING: This page is about a different car, the 2002 Mercury Villager. However, it is still accessible from the selected car via links, so may be relevant.
Perform this test only when directed by QUICK TEST or SYMPTOM DIAGNOSIS. This test is intended to diagnose the following:
- Knock Sensor (KS).
- Harness circuit; KS.
- PCM.
Knock sensor resistance should be 500-620 ohms at 77°F (25°C).