TM 9-2320-363-20-1
Section 3
TESTING THE DDEC III SYSTEM (Cont'd.)
The function may be selected by its "function number" found in the list below. No function should be assigned to more
than on pin (except FUNCTION #0 - No Function).
Examples:
1.
Pin Al of the ECM's 30-pin vehicle harness connector has FUNCTION #7 - Starter Lockout assigned to it. This
function provides a low signal once the engine speed has exceeded 500 RPM and remains low until the engine
speed has dropped below 60 RPM, or the DDEC system has been turned off. It may be interfaced to a relay that
prevents starter operation while the engine is operating.
2.
Pin H3 of the ECM's 30-pin connector has FUNCTION #9 - Transmission Retarder Enable assigned to it. The
function provides a lowsignal (ground) whenever the throttle Is at O% position and cruise control is inactive. It
may be used as an enable indicator to a transmission retarder.
3-345.18 Change 3
