Intermittent Conditions

An intermittent condition may or may not turn on the malfunction indicator lamp (MIL) or store a diagnostic trouble code (DTC).

Preliminary Inspection
Perform a visual inspection to locate the cause of the problem.
^ Refer to Symptoms - Computers and Controls Systems. Symptom Related Diagnostic Procedures
^ The fault must be present to locate the problem. If a fault is intermittent, the use of DTC tables may result in the replacement of good parts.

Electrical Connections or Wiring
Poor electrical connections or wiring can cause most intermittent problems. Perform a careful inspection of the suspected circuit for the following:
^ Inspect for poor mating of the connector halves, or terminals not fully seated in the connector body, backed-out.
^ Inspect for improperly formed or damaged terminals. Carefully reform or replace all the connector terminals in the problem circuit to ensure the proper contact tension.
^ Inspect for poor terminal to wire connections. This requires removing the terminal from the connector body to inspect.