MUFFLER GROUP 8S2815 - Caterpillar

Which Generate This Code:The input for ignition shutdown to the control module for the Electronic Ignition System (EIS) is an open circuit. This code does not appear during a normal engine shutdown. One of the following conditions occur:
The signal from the speed/timing sensor drops to zero when the actual speed of the engine is above 100 rpm.
During a normal shutdown, the signal from the speed/timing sensor does not decrease from 100 rpm to zero rpm within five seconds.
The engine is running at normal speed and a normal shutdown is requested. The engine speed does not decrease by 100 rpm within five seconds.System Response:The ignition is terminated. The warning output is activated. The diagnostic code may be viewed on the Digital Diagnostic Tool (DDT) or on the Caterpillar Electronic Technician (ET).The engine is shut down. If the engine is not running, the engine will crank but the engine will not start.Test Step 1. Perform the following diagnostic procedure: Ignition Shutdown CircuitResults:
OK - STOP