SERVICE MANUAL NUMBER 23
TROUBLE CODE DIAGNOSTICS - 7.4L MPI
Code 41 (3 of 3): Ignition Control (IC) Circuit (Non-Scan) - Open IC Circuit
STEP
ACTION
VALUE
YES
NO
PROCEED TO
4
1. Reconnect ECM.
2. Start engine and idle for 2 minutes or un-
til Marine Diagnostic Code Tool indicates a
trouble code.
3.
Ignition “ON,” engine “OFF.”
4.
Switch Marine Diagnostic Code Tool to
“Service Mode” and note trouble code.
Is trouble code 41 present?
–
–
Step 7
Step 8
Step 6
Locate and repair open in CKT 423. If a
problem is found, repair as necessary. Was a
problem found?
5
Verify
Repair
Replace faulty distributor ignition module. Is
action complete?
6
7
–
–
–
–
Repair faulty ECM connections or replace
faulty ECM. Is action complete?
Trouble code 41 is intermittent. Refer to “Diag-
nostic Aids” on facing page. Check harness
and connectors for an intermittent open in CKT
423.
8
–
–
–
90-861326--1
MARCH 1999
Page 5G-27
| 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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