General Notes

- Only components specifically related to the ignition system are contained in this Repair Group. For the other Fuel injection and Ignition system components, See "Computers and Controls".
- Always switch OFF the ignition when disconnecting and connecting the battery otherwise the Engine Control Module (ECM) could be damaged.
- The Engine Control Module is equipped with an On Board Diagnostic system.
- Components marked with an * are checked via On Board Diagnostic.
Check DTC memory. Refer to "On Board Diagnostic (OBD II), How to Display and Read Diagnostic Codes". Testing and Inspection
- 11.5 Volts minimum is required for trouble-free operation of the electrical components.
- While performing certain checks it is possible that the ECM will recognize and store a Diagnostic Trouble Code (DTC). Therefore after completing all checks and repairs, Check and erase the DTC memory as necessary.
Check DTC memory.

Observe Safety precautions at "Service Precautions".

For Test data on spark plugs, See "Specifications".