Here is illustration to guide you how to optimize/solve Detroit EPA07 GHG14 DDEC VI 10 engine idle does not work on Thermostat mode.
Preparations:
2023 Detroit Diesel Diagnostic Link DDDL 8.17 8.09 Free Download
JPRO DLA+ 2.0 Adapter
NEXIQ USB Link 2 Adapter
Procedures:
Check as follows:
1 With the ignition in the ON position, turn the thermostat on by pressing any button on the display. Does the Optimized Idle Thermostat power up?
1a Yes; Go to step 2.
1b No; disconnect the Optimized Idle Thermostat electrical connector and check pin 6 for vehicle ground and pin 5 for ignition. Repair as necessary.
2 Was the CPC recently programmed?
2a Yes; check for proper CPC parameter settings, Refer to section
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