Diagnostic Aids

Ensure that the correct application (model line, car year, etc.) has been selected on the scan tool. If communication still cannot be established, try the scan tool on another vehicle to ensure that the scan tool or cables are not the cause of the condition.

An intermittent may be caused by a poor connection, rubbed through wire insulation, or a broken wire inside the insulation.

Any circuitry that is suspected of causing an intermittent complaint should be thoroughly checked for the following conditions:

• Backed-out terminals
• Improper mating of terminals
• Broken locks
• Improperly formed or damaged terminals
• Poor terminal-to-wiring connection
• Physical damage to the wiring harness
• Corrosion