DDEC TROUBLESHOOTING
[a] An example listed in Table 10-2 shows pins, wires and functions.
Refer to section 10.7.4.
Pin
Wire
Function
J1
#541
set/coast on
F2
#544
cruise enable
G2
#543
svc brk rel
J2
#531
clutch rel
G3
#545
res/accel on
Table 10-2
Pin Assignments
[b] If the functions are not assigned, reprogram the ECM. Refer to section 10.7.16.
10.7.4
Checking Out of Cruise Control Switch and Wiring
To speed up the checking out of cruise control switches, quick check tables have been developed.
These tests are to be run with the ignition ON, and the engine not running. A DDR must be
plugged into the connector. All three quick check tables must be gone through to completely
check out the cruise control wiring and switches.
For Example: Listed in Table 10-3, step 2, you would do the following:
1. Ignition ON; engine not running; DDR plugged in.
2. Turn the cruise enable switch to ON.
3. Select switch/light status on the DDR.
4. Note the DDR display; if ON, check out brake and clutch switch as listed in Table 10-4.
All information subject to change without notice.
6SE497 9709 Copyright © 1997 DETROIT DIESEL CORPORATION
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