SENSOR GP-SPEED 1967973 - Caterpillar

System Operation Description:"Idle Shutdown Timer"The "Idle Shutdown Timer" is intended to improve fuel economy by limiting idling time.The "Idle Shutdown Timer" is a "Customer Specified Parameter" that may be programmed for any period from 3 to 1440 minutes.The timer is activated when all of the following conditions are met regardless of the position of the parking brake:
The vehicle speed is 0.
The engine is not in "Cold Mode" or "Dedicated PTO Mode".
The engine is not under load.The timer can be reset by moving the vehicle or the timer can be reset by quickly depressing the accelerator pedal and releasing the accelerator pedal.The check engine lamp will begin to rapidly flash 90 seconds before the programmed time expires. During this 90 second time period, the following conditions can disable the timer:
The driver moves the clutch pedal.
The driver moves the service brake pedal.The following event code will be logged when the driver overrides the timer by the use of the clutch pedal or the brake pedal during the 90 second period:
71-00 Idle Shutdown OverrideIf the parameter for the "Allow Idle Shutdown Override" is programmed to "NO", the timer can not be overridden by the use of the clutch pedal or the brake pedal during the final 90 second period. "YES" is the factory default that is programmed for the parameter for the "Allow Idle Shutdown Override". The allowance of the override is the default.An additional parameter can be programmed to allow the timer to be reset above a specified engine speed. When the "Idle Shutdown Timer Maximum RPM" parameter is programmed to a value below the "Top Engine Limit", the timer can be reset by increasing engine rpm above the programmed limit. The timer will be reset until engine rpm drops below the programmed value. The timer will begin counting again. The factory default of 2120 rpm disables this feature. The "Top Engine Limit" is 2120 rpm.If the timer is activated and the timer is allowed to shut down the engine the following event code will be generated:
71-01 Idle ShutdownCode 71-01 records the event and the code does not indicate an electrical system malfunction or an electronic system malfunction. Disable the timer by programming "Idle Shutdown Timer" to 0 (Caterpillar Factory Default).The Engine Control Module (ECM) will shut down the engine but not the vehicle electrical system when the "Idle Shutdown Timer" time expires. The "Engine Shutdown Output" can be used to shut down the vehicle electrical system after the "Idle Shutdown Timer" time has expired.The "Idle Shutdown Timer" feature can be temporarily disabled by the use of Caterpillar Electronic Technician (ET). The "Idle Shutdown Timer" feature can be temporarily disabled through the "System Troubleshooting Settings" screen in order to help troubleshoot other problems. Temporarily disabling this feature avoids engine shutdowns when you are troubleshooting other systems. The use of this method eliminates the need to temporarily alter the customer specified parameter of "Idle Shutdown Timer".Note: If the following diagnostic code is active, the "Idle Shutdown Timer" will not operate.
84-08 Vehicle