Intermittent Faults

Intermittent Faults

If intermittent faults occur, the primary suspect areas are connectors and wiring harness faults. In low current "sensor" circuits, connector pin corrosion is a particular concern. The simple action of breaking and remaking a connection may be sufficient to correct an intermittent fault. To test for intermittent faults that may be caused by vibration, manually shake wires and connectors, tap or shake components while performing diagnostic checks.

Typical PDU Datalogger Trigger:

Use the Portable Diagnostic Unit (PDU) "Datalogger" function to monitor signals and capture faults while driving.