Missing Engine RPM Input

SYMPTOM MISSING ENGINE RPM INPUT
When Monitored and Set Condition: MISSING ENGINE RPM INPUT
- When Monitored: Continuously with ignition on.
- Set Condition: This condition occurs when the Transfer Case Control Module stops receiving a bus message for Engine RPM for the period of 5 seconds.

POSSIBLE CAUSES
- INTERMITTENT WIRING AND CONNECTORS
- OTHER DTC'S PRESENT
- CONDITION PRESENT