Section
4
TROUBLESHOOTING
CHARTS
D. CHART 8.
STOP ENGINE
LIGHT
ALWAYS ON AND CODE 25 ON DDR
NOTE ThischartISonlytobeusedif
1) Allbasicmechanicalchecksandphysicalinspectionshavebeenperformedwithnoproblemfound.and
2) DiagnosisofDDEC-IIwasstartedatstepStart-1(page 3-121)andyouhavenowbeenreferredhere
C8-1
Determine
Stop
Engine
Light Status
l Turnignition on (engine
not running)
while at the same time observing
the Stop Engine light.
C8-2
Check
For Short
l Turn ignition off.
Disconnect the vehicle harness
connector at the ECM.
Turnignition on (engine not running)
while at the same time observing
the "Stop Engine light.
C8-3
Check
ECM
Connectors
l Check terminals at the vehicle
harness connector (both the ECM
and harness side) for damage;
bent, corroded, and unseated
pins or sockets. Pay close attention
to B2 and B3.
C8-30
Verify
Repairs
l Turn ignition
off.
l Reconnect
all connectors.
l Turn ignition
on.
l clear
codes.
l Turn ignition
off.
l Turn ignition
on while at the same
time observing the Stop Engine
light.
TM 9-2320-363-20-1
RESULT
WHAT TO DO NEXT
Stop Engine
This is the normal operation.
light comes on for
Unless other problems exist,
up to 5 seconds,
return to service.
then goes out.
Stop Engine
Go to C8-2.
light comes on
and stays on.
Stop Engine
Stop Engine light driver line (cM
light comes on
#509) is shorted to ground. Contact
and stays on.
Direct Support. Then go to C8-30.
Stop Engine
Go to C8-3.
light stays off.
Replace ECM, page 4-192.
Then go to C8-30.
Repair terminals/connectors,
page 3-2. Then go to C8-30.
Stop Engine
Repairs
are complete.
light comes on for
up to 5 seconds,
then goes out.
Stop Engine
All system diagnostics
are
light comes on
complete. Please review this
and stays on.
section from the first step to find
the error.
3-183