Detroit Diesel DDEC VI Application And Installation page 304

FEATURES
Idle Shutdown with Ambient Air Temp Continuous Override
It is possible for idle shutdown to be overridden continuously based on ambient air temperature.
This allows the engine to continue to run while the temperature is such that power from the engine
is required to heat or cool the air to keep the cab temperature comfortable.
Continuous override is only available if an ambient air temperature sensor is configured for use
(Ambient Air Temp Sensor Enable) and overrides are enabled (Enable Idle PTO Shtdn Override).
There are two modes of operation: operator override and automatic override. In both cases, the
override will only be allowed if the ambient air temperature is reading extreme (i.e. it is outside
the limits "Lo Amb Air Override Temp" and "Hi Amb Air Override Temp".
If automatic override is enabled ("Idle Shutdown Auto Override"), idle shutdown will always be
overridden while the ambient air temperature is reading extreme. If automatic override is not
enabled and operator override is, the operator may explicitly activate the override by pumping the
accelerator pedal while idle shutdown is in progress and the CEL is flashing.
Note that the definition of a 'pump' of the accelerator pedal depends upon the idle/PTO shutdown
mode:
□ Idle/PTO shutdown with/without park brake status – in either of these modes, pumping
the accelerator pedal is done simply by pressing the pedal.
□ Idle/PTO shutdown with edge triggered accelerator pedal – in this mode, pumping the
accelerator pedal is done by moving it from below 40% to above 80%.
The continuous operator override will remain active until the ambient air temperature is no
longer extreme, the park brake is not applied, the ignition is turned off, or the operator pumps
the pedal again. Note that pumping the pedal will only cancel the override if it has already
been in effect for at least 10 seconds.
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All information subject to change without notice. (Rev. 01/07)
7SA827 0701 Copyright © 2007 DETROIT DIESEL CORPORATION