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Section 4
TM9-2320-360-20-3
TROUBLESHOOTING CHARTS
D. CHART -2 - ENGINE CRANKS BUT WILL NOT START (Cont’d)
STEP/SEQUENCE
C 2-21
Check for +12 or +24
Volts at lgnition Wire
Turn ignition off.
Disconnect vehicle harness
connector at ECM.
Turn ignition on.
Read voltage between socket B3
on the vehicle harness connector
(red lead) and a good ground
(black lead).
C 2-22
Check for Good
Ground Wire
Read voltage between socket B3
on vehicle harness connector
(red lead) and socket D and E
on 5-way power harness.
C 2-23
Check If lgnition
Circuit Breaker Is
Okay
Turn ignition off.
Check DDEC ignition
circuit breaker (CB11).
RESULT
WHAT TO DO NEXT
Less than
11.5 volts.
Go to C 2-23.
Greater than
or equal to 11.5 Volts.
Go to C 2-22.
Less than
11.5 volts.
Greater than
or equal to 11.5 volts.
ECM ground wire (ckt #150)
is open or has a poor connection.
Repair open or poor connection.
Then go to C 2-30.
Go to C2-11.
Circuit breaker
is okay.
Circuit breaker open.
Go to C 2-24.
Go to C 2-25.
H-55
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