Intermittent Symptoms

SYMPTOM DESCRIPTION:



FAULTY ELECTRICAL CONNECTIONS OR WIRING

Most intermittent problems are caused by faulty electrical connections or wiring. Perform a careful check of suspect circuits for:

^ Signs of moisture at terminal connectors or relay boxes.
^ Poor mating of connector halves or terminals not fully seated in 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. Requires removing terminal from connector body to check.



ROAD TEST

If a visual/physical check does not locate the problem, vehicle can be driven with a voltmeter connected to a suspected circuit. An abnormal voltage reading, when the problem occurs, indicates the problem may be in that circuit. If wiring and connectors check OK, replace suspect sensor. If an abnormal voltage reading is detected, wiring and connectors are OK, ECU or power supply may be defective.