SERVICE MANUAL NUMBER 23
GENERAL SYSTEM DIAGNOSTICS
Chart A-7 (6 of 6): Ignition System Check
Step
Action
Value(s)
Yes
No
Replace faulty pick-up coil.
Is Action Complete?
Go to OBD
System
18
–
–
Check
Inspect distributor cap for water,
cracks, etc. If OK, replace faulty
distributor rotor.
Go to OBD
System
Check
19
20
–
–
–
–
Is Action Complete?
Check for open or short to
ground in CKT 3, the pink wire
from the ignition module “+”
terminal to the ignition coil. Also
check for open CKT 902, the red
wire from the EFI system relay to
the ignition coil.
Go to OBD
System
Is Action Complete?
Check
Check for open or short to
ground in CKT 121, the brown
wire from the ignition module “C”
terminal to the ignition coil. If OK,
replace faulty ignition coil.
21
–
–
Go to OBD
System
Check
Is Action Complete?
Repair faulty connections or
open tach lead.
Repeat Step 8.
Go to OBD
System
Check
22
23
–
–
–
–
Check ignition module ground. If
OK,
replace
faulty
ignition
Go to OBD
System
Check
module.
Is Action Complete?
Replace distributor pole piece
and shaft assembly.
Is Action Complete?
Go to OBD
System
Check
24
25
–
–
–
–
A mechanical repair will be
necessary before continuing with
this test.
–
Index
90-861326--1
MARCH 1999
Page 5E-89
| Categories | Mercury MerCruiser Manuals |
|---|---|
| Tags | Mercury MerCruiser 454 CID, Mercury MerCruiser 502 CID |
| Model Year | 1998, 1999, 2000, 2001 |
| Download File |
|
| Document File Type | |
| Copyright | Attribution Non-commercial |
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