Mercury MerCruiser MCM 7.4L MPI User Manual

TROUBLE CODE DIAGNOSTICS - 7.4L MPI SERVICE MANUAL NUMBER 23
Page 5G-24 90-861326--1 MARCH 1999
Code 34 (3 of 3): Manifold Absolute Pressure (MAP) Sensor Circuit (Non-Scan)
Low Signal Voltage
STEP ACTION VALUE YES NO
PROCEED TO
4
Locate and repair intermittent faulty connec-
tions. If OK, replace faulty MAP sensor.
Is
action complete?
– –
5
Locate and repair open or short to ground in
CKT 432. If a problem is found, repair as nec-
essary.
Was a problem found?
–
Verify
Step 7
6
Locate and repair open or short to ground in
CKT 416E. Also check CKT 416 to the TP sen-
sor for a short to ground. If a problem is found,
repair as necessary.
Was a problem found?
–
y
Repair
Step 7
7
Repair faulty ECM connections or replace
faulty ECM.
Is action complete?
– –
Downloaded from https://needmanual.com/!
Index

Mercury MerCruiser MCM 7.4L MPI Specifications

General

Brand	Mercury
Model	MerCruiser MCM 7.4L MPI
Category	Engine
Language	English