Mercury MerCruiser Engines Service Manual Number 24 GM V-8 305 CID 350 CID

SERVICE MANUAL NUMBER 24
DIAGNOSTICS
Code 52 (1 of 1): EEPROM Failure
72801
CIRCUIT DESCRIPTION:
This test allows the ECM to check for a calibration failure by comparing the calibration value
to a known value stored in the EEPROM.
This test  is also used  as a security  measure to prevent  improper use of  calibrations or
changes to these calibrations that may alter the designed function of EFI.
DIAGNOSTIC AIDS:
If DTC 52 failed more than once, but is intermittent, replace the ECM.
Step
Action
Yes
No
PROCEED TO
Was the “On-Board Diagnostic” (OBD) System Check
Performed?
1.
Step 2.
OBD
a.   Clear trouble code 52.
b.   Ignition ON.
Refer to
Diag-
nostic
Aids
2.
3.
Does trouble code 52 reset?
Step 3.
Replace faulty ECM and verify trouble code 52 does not
reset.
Verify
Repair
Index
90-861327--1
OCTOBER 1999
Page 5G-87
Product Specification
CategoriesMercury MerCruiser Manuals
Tags,
Model Year1998, 1999, 2000, 2001
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- 895 pages
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CopyrightAttribution Non-commercial
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Mercury MerCruiser Engines Service Manual Number 24 GM V-8 305 CID 350 CID SKU UPC Model
Fernando Woll on Dec 09, 2014. Boat Engine

Great performance engine.
Class 1


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