Diagnostic Aids
An intermittent may be caused by a poor connection, rubbed through wire insulation, or a broken wire inside insulation. Check for:
- Poor Connection Or Damaged Harness
Inspect PCM harness connectors for backed out cam signal circuit terminal, improper mating, broken locks, improperly formed or damaged terminals, poor terminal to wire connection, and damaged harness. - Intermittent Test
If connections and harness are okay, monitor a DVOM connected between PCM cam signal circuit terminal and ground while moving related connectors and wiring harness. If failure is induced, voltage reading will change. This may assist in isolating the location of the malfunction.