|
| |
TM9-2320-360-20-3
Section 4
TROUBLESHOOTING CHARTS
D. CHART -2 - ENGINE CRANKS BUT WILL NOT START (Cont’d)
STEP/SEQUENCE
RESULT
C 2-15
Check If Injector Drive
or Return Lines are
Shorted to Ground
Disconnect the 5-way power
harness connector at the ECM.
Read resistance between socket
D of the B-way power harness
connector to the following sockets
on the injector harness connectors:
A, B, C, D, E, G, H, J, K, and L.
C 2-16
Injector Drive
Pulses
l Turn ignition off.
l Reconnect all ECM connectors.
l Remove rocker arm cover(s)
(para 3-2).
l Place a 6 volt test light across the
injector return side (return wire
#619 or #620) and a good
ground.
l Crank engine and note if the
test light flashes.
l Reconnect the return wire.
l 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
l Check both DDEC circuit
breakers (CB 20 + 21).
Greater than
or equal to 10,000 ohms
or open on all readings.
Less than 10,000 ohms
on any reading.
All tests pass.
Light not
flashing for one
or more tests.
Open circuit breaker(s).
Go to C 2-28.
Circuit breakers are okay.
Go to C 2-18.
WHAT TO DO NEXT
Go to C 2-16.
A short to ground on wire where
resistance was less than 10,000
ohms. Repair short. Then go
to C 2-30.
The problem does not appear
to be in the DDEC system. Refer
to Chapter 2, Vehicle
Troubleshooting, for other possible
causes of a no-start condition.
Go to C 2-11.
H-51
|
