Failure Mode Effects Management

During some electronic ignition (EI) system faults:

• The failure mode effects management (FMEM) portion of the ignition control module (ICM) (12K072) will maintain vehicle operation.
• If the ignition control module does not receive the SAW input, it will automatically turn the ignition coils (12029) ON and OFF using the CKP signal.
• However, this condition will result in fixed spark timing (10 degrees BTDC).

Additional information on the EI theory of operation can be found in the Powertrain Control/Emissions Diagnosis Manual .