STEP/SEQUENCE
RESULT
WHAT TO DO NEXT
TM 9-2320-363-20-1
Section 4
TROUBLESHOOTING CHARTS
D. CHART -16 - IDLE SHUTDOWN FEATURE 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 16-1
Check Calibration
Configuration
Turn ignition on.
NO.
Idle shutdown feature is not
Plug in DDR in DDL connector
selected. Refer to the DDR
Select calibration configuration
instruction Manual, calibration
and determine status of the
calibration changes, for
idle shutdown feature. Is it
information on turning on this
enabled?
feature.
YES.
Go to C16-2.
C 16-2
Determine Idle
Shutdown Status
Select calibration configuration
(vehicle input switches).
Determine which port on the
ON.
Problem no longer exists. Refer
vehicle harness is configured for
to C 1-2 for diagnosing an inter-
the idle shutdown time.
mittent problem.
Activate (ground) the wire that
operates the idle time.
Select vehicle switch/light status
OFF.
Go to C 16-3.
determine the status of that switch
C 16-3
Try to Turn Switch
"ON".
Disconnect vehicle 30-pin
Park brake/lSD reads
Go to C 16-4.
harness - jumper port
"on".
configured/switch and a good
ground.
Park brake/ISD switch.
The switch input used for idle
read "off'.
shutdown is open or the parking
brake or neutral switch is open or
not making contact. Repair open
or replace switches as
appropriate. (If no problem
found, go to C 16-4.) Then go to
C 16-30.
Change 3 3-345.155
