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

PROCEED TO

Was the “On-Board Diagnostic” (OBD) System Check

Performed?

Step 2.

OBD

a. Clear trouble code 52.

b. Ignition ON.

Refer to

Diag-

nostic

Aids

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

Categories	Mercury MerCruiser Manuals
Tags	Mercury MerCruiser 305 CID, Mercury MerCruiser 350 CID
Model Year	1998, 1999, 2000, 2001
Download File	Please Enter the Security Characters Shown Below. Letters are Case Sensitive. Your download link will appear upon completing this step. - 895 pages
Document File Type	PDF
Copyright	Attribution 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