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.