Systematic Use

1) Visually inspect sensor, switch or solenoid affected. Enter CONTINUOUS SELF-TEST and lightly tap sensor, switch or solenoid.

2) Push/pull on sensor, switch or solenoid connector while not disconnecting. Test and wiggle (shake) harness vigorously, working from sensor, switch or solenoid toward dash panel and from the dash panel to ECA in small sections.

3) If volt/ohmmeter does not have a positive indication of an intermittent fault, carefully disconnect sensor, switch or solenoid from harness. Remove terminals from connector.

4) Inspect terminals at both ends for corrosion, bad crimps and improperly seated terminals. Reconnect after inspection and unplug processor from harness.

5) Inspect terminals for corrosion, bad crimps and improperly seated terminals. If volt/ohmmeter does not indicate an intermittent fault plug in connector and erase codes.

NOTE: Fuel contaminated engine oil will affect some service codes. If this is suspected, remove PCV valve from valve cover and repeat QUICK TEST. If problem is corrected, change engine oil and filter.