Detroit Diesel Electronic Controls System Idle Shutdown Timer This feature is an optional, predetermined timed idle shutdown system. Its purpose is to conserve fuel by eliminating excessive idling and allowing a turbocharger cool-down period. The idle shutdown timer activates when the transmission is in neutral with the vehicle parking brakes set and the engine is at idle or in fast-idle mode. California Engine Idle Limiting For California (50-state) EPA certification engines that idle above 900 rpm, the California Engine Idle Limiting feature is enabled.
The engine will generally shut down after five minutes of continuous idling when the transmission is in neutral or park and the parking brake is set or after 15 minutes when the transmission is in neutral or park and the parking brake is not set. The automatic shutdown feature that is applied above 900 rpm is required for all California certified engines with the exception of engines used in specific vehicle types which the state of California has determined to be exempt from the idle shutdown requirement. Non-California (49-state) EPA certification engines have the automatic shutdown feature enabled.
In California and Opt-in states, extended idling above 900 rpm is not allowed unless the engine is performing a parked DPF regeneration or engaged in PTO operations such as pumping, hydraulics, etc. 40 All information subject to change without notice. Copyright © 2022 DETROIT DIESEL CORPORATION DDC-SVC-MAN-0217