STEP/SEQUENCE
RESULT
WHAT TO DO NEXT
TM 9-2320-363-20-1
Section 4
TROUBLESHOOTING CHARTS
D. CHART-12 - CRUISE CONTROL INOPERATIVE
NOTE - This chart is only to be used if:
1)
All basic mechanical checks and physical inspections have been performed with no problem found, and
2)
Diagnosis of DDEC-III was started at step Start-1, pg 3-345.41 and you have now been referred here.
C 12-1
Determine Type of
Cruise Control System
Check to see that this is a DDEC
cruise control system.
Yes
Go to C12-3.
Turn ignition on.
No
This manual only includes
Plug DDR into DDL connector.
diagnosis of the cruise
Select calibration configuration
control system. Refer to
(cruise control).
vehicle manufacturer's
Cruise control enable?
recommendation concerning
your system
C 12-2
Check ECM
Connectors
Disconnect the vehicle harness
Terminals and
Reprogram ECM
connector at the ECM.
connectors are okay.
then go to C12-30.
Check terminals at the ECM
vehicle harness connector (both
ECM and harness side) for damage
corroded, or unseated pin or
Problem found
Repair terminals/connectors
sockets.
then go to C12-30.
C 12-3
Check Pin
Assignments
Turn ignition on.
EXAMPLE
Plug in DDR.
PIN
WIRE
FUNCTION
J1
#541
set/coast on
Select calibration configuration
F2
#544
cruz enable
(ECM ins/outs).
G2
#543
svc brk rel
J2
#531
clutch rel
G3
#545
res/accel on
Go to C12-4.
Write/print pin assignments.
Function(s) not assigned
Reprogram ECM
then go to C12-30.
Change 3 3-345.127
