EasyManuals Logo

Mercury MerCruiser MIE 7.4L MPI User Manual

Mercury MerCruiser MIE 7.4L MPI
1027 pages
To Next Page IconTo Next Page
To Next Page IconTo Next Page
To Previous Page IconTo Previous Page
To Previous Page IconTo Previous Page
Page #716 background imageLoading...
Page #716 background image
SERVICE MANUAL NUMBER 23
TROUBLE CODE DIAGNOSTICS - 454/502 MAG MPI & 8.2L MPI
90-861326--1 MARCH 1999 Page 5F-19
Code 43 (3 of 3): Knock Sensor (KS) Circuit (Non-Scan)
STEP ACTION VALUE YES NO
PROCEED TO
1. Disconnect knock module harness con-
nector.
6
2. Connect a test light to battery positive
(B+).
3. Touch the test light to KS harness con-
nection terminal “D” (CKT 486).
Is test light on?
Step 10 Step 13
1. Connect a test light to ground.
7
2. Disconnect KS module harness connec-
tor.
7
3. Touch the test light to KS module har-
ness connector terminal “B” (CKT439).
Is the test light on?
Step 11 Step 12
8
Inspect knock sensor terminal contacts. If OK,
replace knock sensor.
9
Check for open or short in CKT 496. If OK,
replace knock sensor.
10
CKT 496 open, shorted to ground, or faulty
knock sensor module.
11
CKT 485 open, shorted to ground, or faulty
knock sensor module.
12 Repair open or grounded CKT 439.
13 Repair open ground CKT 486.
14 Faulty ECM.
Downloaded from https://needmanual.com/!
Index

Table of Contents

Questions and Answers:

Question and Answer IconNeed help?

Do you have a question about the Mercury MerCruiser MIE 7.4L MPI and is the answer not in the manual?

Mercury MerCruiser MIE 7.4L MPI Specifications

General IconGeneral
BrandMercury
ModelMerCruiser MIE 7.4L MPI
CategoryEngine
LanguageEnglish

Related product manuals