Intermittents and Poor Connections

An intermittent failure in the electronic system may be very difficult to detect and accurately diagnose. The EBCM/EBTCM tests for different malfunctions under different vehicle conditions. For this reason, a thorough test drive is often needed in order to repeat a malfunction. If the system malfunction is not repeated during the test drive, a good description of the complaint may be very useful in locating an intermittent malfunction. Faulty electrical connections or wiring may be the cause of most intermitting problems. When an intermitting condition is suspected, inspect the circuits for the following conditions:
- Poor mating of connector halves or backed out terminals
- Improperly formed or damaged terminals
- Wire chafing
- Poor wire to terminal connections
- Dirty or corroded terminals
- Damage to connector bodies

If the DTC is a history DTC, the condition may be intermittent. Perform the tests shown while moving the related wiring and connectors. This may often cause the malfunction to occur. Perform a thorough inspection of all of the related wiring and connectors pertaining to the history DTC stored.