Description:
The Allow Idle Shutdown Override parameter determines whether the clutch or service brake can be used to override the Idle Shutdown Timer during the last 90 seconds of timing. The Idle Shutdown Timer parameter must be programmed to a value other than 0 (zero). The Allow Idle Shutdown Override parameter has three different settings.
Yes – Allows the driver to override the Idle Shutdown Timer during the last 90 seconds of timing. (If the driver does override the timer an Idle Shutdown Override Event will be logged in the ECM memory)
No -The driver can not override the Idle Shutdown Timer during the last 90 seconds of timing. In other words, the truck will always shutdown. (When the engine does shutdown at the end of the Idle Shutdown Time period an Idle Shutdown Occurrence event will be logged in the ECM memory).
Outside Temperature Based – If the truck has the optional Outside Air Temperature Sensor installed (see authorized Cat Dealer or truck OEM for part number) and the Minimum and Maximum Idle Shutdown Outside Temperature parameters are properly programmed, then Idle Shutdown will be based on the Outside Air Temperature.
Available:
All electronically controlled on-highway engines covered in this handbook
Range:
Advantages:
By programming the Allow Idle Shutdown Override parameter to No, it is guaranteed that the truck will shutdown at the programmed time. This can increase fuel economy and decrease engine wear.
The Outside Temperature Based setting allows the flexibility of a defined temperature range where the engine will always shutdown along with temperature ranges where the driver can override the shutdown, allowing the use of air conditioning or heating.
Disadvantages:
None
Recommendations:
Caterpillar recommends setting this parameter to No for most applications when the driver is not required to sleep in the truck.
Caterpillar recommends the installation of the optional temperature sensor and setting this parameter to Outside Temperature Based for applications when the driver is required to sleep in the truck. Refer to Special Instruction SEHS9920 for installation details.