Diagnostic Aids
An intermittent may be caused by a poor connection, rubbed through wire insulation or a wire broken inside insulation. Check for:
- Poor Connection Or Damaged Harness
Inspect PCM harness for an open or short to ground in desired torque circuit, improper mating, broken locks, improperly formed or damaged terminals, poor terminal to wire connection and damaged harness. - Intermittent Test
Using a DVOM observe voltage between PCM desired torque terminal and ground while moving related connectors and wiring harness with warm engine running. If failure is induced, voltage reading will change. This may assist in isolating the location of the malfunction.