Intermittents

SYMPTOM DESCRIPTION:
Problems may or may not turn "ON" the Malfunction Indicator Lamp, or store a code.

CAUTION: DO NOT use the Trouble Code To Fault Message Conversion section to diagnose intermittent problems. The fault must be present to locate the problem. If a fault is intermittent, use of trouble code charts may result in replacement of good parts.

FAULTY ELECTRICAL CONNECTIONS OR WIRING
Most intermittent problems are caused by faulty electrical connections or wiring. Perform careful check of suspect circuits for:

- Poor mating of the connector halves, or terminals not fully seated in the connector body (backed out).
- Improperly formed or damaged terminals. All connector terminals in problem circuit should be carefully reformed or replaced to insure proper contact tension.
- Poor terminal to wire connection. This requires removing the terminal from the connector body to check.


ROAD TEST
If a visual/physical check does not find the cause of the problem, the vehicle can be driven with a voltmeter connected to a suspected circuit, or a SCAN TOOL can be used. An abnormal voltage or "Scan" reading, when the problem occurs, indicates the problem may be in that circuit.

NOTE: It would be advantageous to make note of any codes stored and clear the Powertrain Control Module (PCM) memory prior to road testing. This may eliminate any false codes not related to the complaint.