SERVICE MANUAL NUMBER 24
DIAGNOSTICS
On-Board Diagnostic (OBD) System Check
Step
Action
Yes
No
PROCEED TO
1.
Are you using a Scan Tool?
a. Ignition OFF.
Step 2. Step 6.
b. Install a scan tool.
c. Ignition ON.
Chart
Step 3.
2.
A-1
d. Attempt to display ECM data with the scan tool.
Does The Scan Tool Display ECM Data?
Attempt to start the engine.
Did The Engine Start And Continue To Run?
Chart
Step 4.
3.
4.
A-3
Select “Display DTCs” with the scan tool.
Are Any Trouble Codes Stored?
DTC
Step 5.
Chart
Compare ECM data values displayed on the scan tool to the
typical scan tool data values page.
Are The Displayed Values Normal Or Close To The shooting
Diag-
Trouble-
5.
6.
nostic
Testing
Typical Values?
a. Ignition ON, engine OFF.
b. Install CodeMate Tester and switch it to “Normal Mode.”
Step 7.
c. Observe the MIL.
Chart
A-1
Is the MIL ON?
a. With CodeMate Tester on “normal mode.”
b. Ignition ON, engine OFF.
7.
8.
Step 12. Step 8.
c. Observe the MIL on the CodeMate Tester.
Does the MIL Flash DTC 12?
a. Switch CodeMate Tester to “Service Mode.”
b. Ignition ON, engine OFF.
Chart
Step 9.
A-2
c. Observe the MIL on the CodeMate Tester.
Does the MIL Flash DTC 12?
a. Switch CodeMate Tester to “Normal Mode.”
Chart
Step 10.
9.
b. Attempt to start the engine.
A-3
Did The Engine Start And Continue To Run?
a. Ignition ON, Engine OFF.
DTC
10.
Step 11.
Chart
b. Switch CodeMate Tester to “Service Mode.”
Are Any Additional DTC Stored?
Diag-
Symp-
Does A Customer Complaint Or Driveability Problem
Currently Exist?
11.
12.
nostic
toms
Aids
Verify
–
Check CKT 451 for a short to ground.
Repair
Index
90-861327--1
OCTOBER 1999
Page 5G-25
| Categories | Mercury MerCruiser Manuals |
|---|---|
| Tags | Mercury MerCruiser 305 CID, Mercury MerCruiser 350 CID |
| Model Year | 1998, 1999, 2000, 2001 |
| Download File |
|
| Document File Type | |
| Copyright | Attribution Non-commercial |
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Marine readers have rated Mercury MerCruiser Engines Service Manual Number 24 GM V-8 305 CID 350 CID 4.0 out of 4.0 based on 1 product reviews. Great performance engine.
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