Test Description
The numbers below refer to the step numbers on the diagnostic procedures.
- 4
When a Medium Resolution Resync occurs, an engine stumble should also occur. If the electrical connection of a component or an electrical wire is malfunctioning, an engine stumble or a medium resolution resync may be induced by wiggling the circuit or electrical connector. - 5
Operating malfunctioning, non-engine related electronic components may emit electromagnetic interference (EMI), which may cause a resync. This step determines if the medium resolution resyncs are being caused by an outside source. - 6
Thoroughly check any suspected circuitry. See DIAGNOSTIC AIDS . - 8
An intermittent problem may be caused by a number of conditions. See DIAGNOSTIC AIDS . - 11
Program the replacement PCM and perform the Crankshaft Position System Variation Learn Procedure. See POWERTRAIN CONTROL MODULE and CRANKSHAFT POSITION SENSOR under PROGRAMMING.