Mercury MerCruiser MCM 454 Mag MPI Service Manual page 662

SERVICE MANUAL NUMBER 23
Chart A-3 (4 of 5): Engine Cranks But Will Not Run
Index
90-861326--1 MARCH 1999
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1. Disconnect injector that did not
blink.
2. Ignition "ON".
3. Using a test light connected to
12
ground,probe injector harness
connector terminals.
Does Test Light
Brightly On Both Terminals?
1. Reconnectors.
2. Ignition "OFF".
3. Disconnect ECM.
4. Ignition "ON".
13 5. Using a test light connected to
ground, probe ECM harness
terminals "J2-5" and "J2-21".
Does Test Light
Brightly?
Replace faulty TP sensor.
14
Is Action Complete?
1. Locate and repair open or short
to ground in CKT 430.
2. If OK, replace faulty ignition
15
control module.
Is Action Complete?
Locate and repair short to ground
or replace any injector that mea-
16
sures under 10 ohms.
Is Action Complete?
1. If the light was "OFF" on both
terminals, locate and repair
open in injector feed circuit.
2. Due to the injectors wired in
parallel, there should be a light
17
on both terminals. If not, locate
and repair open in the harness
to the tested injector.
Is Action Complete?
–
Illuminate
Go to Step 13
–
Illuminate
Go to Step 19
–
System Check
System Check
–
System Check
–
System Check
–
GENERAL SYSTEM DIAGNOSTICS
Go to Step 17
Go to Step 18
Go to OBD
–
Go to OBD
–
Go to OBD
–
Go to OBD
–
Page 5E-69