Mazda 6 Service Manual: No. 1 one or more on-board diagnostic functions inoperative

• When performing an asterisked (*) troubleshooting inspection, shake the wiring harness and connectors while doing the inspection to discover whether poor contact points are the cause of any intermittent malfunctions. If there is a problem, check to make sure connectors, terminals and wiring harnesses are connected correctly and undamaged.

Diagnostic procedure

Note

• For with theft-deterrent system, follow the procedure from Step 4.