Loss of Engine RPM Messages

Tests 1 - 2:

SYMPTOM
LOSS OF ENGINE RPM MESSAGE

WHEN MONITORED
With the Engine running.

SET CONDITION
When the Memory Heated Seat Mirror Module does not receive the engine RPM Bus message. This can be caused by a loss of voltage due to the IOD fuse being removed and cycling the ignition switch.

POSSIBLE CAUSES
- Stored code/communication problems
- Memory heated seat mirror module
- Intermittent problem