DDEC VI ELECTRONIC CONTROLS APPLICATION AND INSTALLATION
3.7.4
HIGH EXHAUST SYSTEM TEMPERATURE LAMP
The HEST Lamp is controlled by DDEC VI.
The HEST Lamp remains ON:
□
For approximately
fi
ve (5) seconds at the start of every ignition cycle
(a bulb check).
□
When the vehicle speed is less than 5 mph and the DPF outlet
temperature is greater than 525°C.
High Exhaust System Temperature Lamp Requirements and Guidelines
The following requirements and guidelines apply to the HEST Lamp:
□
The HEST Lamp is optional and must be supplied by the OEM.
□
A 12 volt light of less than 2.0 A (DC) is required depending on the ignition source. Digital
output circuits are designed to sink no more than 2.0 A (DC) current.
□
The HEST Lamp must be integrated into the instrument panel or placed in clear view of
the vehicle operator.
□
The lens color must be amber.
□
This output is wired to pin 4/7 of the CPC.
□
This lamp can be multiplexed on J1939.
Programming Requirements and Flexibility
The parameters for the High Exhaust System Temperature Lamp are listed in Table 3-111..
All information subject to change without notice.
(Rev. 01/07)
3-111
7SA827 0701
Copyright © 2007 DETROIT DIESEL CORPORATION
