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Page Title:
CHART - 2 - ENGINE CRANKS BUT WILL NOT START (Cont'd) |
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 TM 9-2320-364-20-1
Section IV. TROUBLESHOOTING CHARTS (Cont.)
D. CHART - 2 - ENGINE CRANKS BUT WILL NOT START (Cont'd)
-
STEP/SEQUENCE
RESULT
WHAT TO DO NEXT
C 2- 15
-
Check if Injector Drive
or Return Lines are
Shorted to Ground
Disconnect the 5-way power
Greater than
Go to C 2--16.
harness connector at the ECM.
or equal to 10,000 ohms
Read resistance between socket
or open on all readings.
D of the 5-way power harness
connector to the following sockets
Less than 10,000 ohms
A short to ground on wire where
on the injector harness connectors:
on any reading.
resistance was less than 10,000
A, B, C, D, E, G, H, J, K, and L.
ohms. Repair short. Then go
to C 2--30.
C 2- 16
-
Injector Drive
Pulses
Turn ignition off.
All tests pass.
The problem does not appear
Reconnect all ECM connectors.
to be in the DDEC system. Refer
Remove rocker arm cover(s)
to Chapter 2, Vehicle
(para 3-4 and 3-5).
Troubleshooting, for other possible
Place a 6 volt test light across the
causes of a no-start condition.
injector return side (return wire
#619 or #620) and a good
Light not
Go to C 2--11.
ground.
flashing for one
Crank engine and note if the
or more tests.
test light flashes.
Reconnect the return wire.
Repeat the above procedure with
all other injectors until all have
been tested or until one test fails.
C 2- 17
-
Check DDEC
Circuit Breakers
Check two DDEC circuit
Open circuit breaker(s).
Go to C 2--28.
breakers (CB22 and CB23).
Circuit breakers are okay.
Go to C 2--18.
2-565
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