WHAT TO DO NEXT
D. CHART -15 - IDLE SHUTDOWN FEATURE ALWAYS ON
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.
Verify the Idle
Shut Engine Down
Turn ignition on.
Go to C15-2.
Plug in DDR.
Select engine data list. Verify idle
Go to Start-1, pg 3-345.41.
shutdown option is enabled and
Problem is not related to idle
is what shut the engine down.
Vehicle Input Switch
is Configured for Idle
Select calibration configuration
(vehicle input switches).
Determine which port on the
Go to C 15-3.
vehicle harness is configured for
the idle shutdown time.
Activate (ground) the wire that
operates the idle timer.
Select vehicle switch/light status
Switch reads "off
Replace ECM if no other codes
determine the status of that switch
Check if Switch Can
be Turned Off
(Note: vehicle should be parked
Park brake/lSD switch.
Go to C 15-4.
on a level surface before trying
Turn ignition on (engine not
Place transmission in any gear.
Park brake/ISD switch.
A short exists in the switch input
Disengage parking brake.
being used. Either the switch is
Observe DDR display.
shorted, or the wire is designed
Vehicle switch light status
to be grounded at all times and
(veh input switch).
no defect exists.
Change 3 3-345.151