Mercury MerCruiser MCM 454 Mag MPI Service Manual page 460

SERVICE MANUAL NUMBER 23
Section 5B - Multi-Port Fuel Injection Descriptions And
Table of Contents
Identification . . . . . . . . . . . . . . . . . . . . . . . .
Electronic Control Module (ECM)
General Information
Introduction . . . . . . . . . . . . . . . . . . . . . .
Visual / Physical Inspection
Basic Knowledge and Tools Required
Electrostatic Discharge Damage
Diagnostic Information
Wiring Harness Service
Wiring Connector Service
Abbreviations . . . . . . . . . . . . . . . . . . . . . . .
ECM Self-Diagnostics
Diagnostic Code Tool With Malfunction
Indicator Lamp
Intermittent Malfunction Indicator
Lamp . . . . . . . . . . . . . . . . . . . . . . . . . .
Reading Codes
Scan Tools . . . . . . . . . . . . . . . . . . . . . . .
EFI Diagnostic Circuit Check
Scan Tool Use With Intermittents
Non-Scan Diagnosis of Driveability
Concerns (With No Codes Set)
Special Tools . . . . . . . . . . . . . . . . . . . . . . .
Precautions . . . . . . . . . . . . . . . . . . . . . . . .
Index
90-861326--1 MARCH 1999
Downloaded from https://needmanual.com/
FUEL SYSTEM
System Operation
. . .
. . . . . . . . . . . . . . . . .
. . . . . . . .
. . . .
. . . . . . . . . . . .
. . . . . . . . . . .
. . . . . . . . . .
. . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . .
. . . . . . .
. . . 5B-10
. . . . 5B-11
5B-12
5B-13
MULTI-PORT FUEL INJECTION DESCRIPTIONS AND SYSTEM OPERATION
5B-2 Electronic Control Module (ECM) and
5B-2 Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . .
5B-3 General Description
5B-3 Computers and Voltage Signals
5B-3 Analog Signals
5B-3 Digital Signals
5B-4 Engine Control Module (ECM)
5B-4 Speed Density System
5B-4 ECM Input and Sensor Descriptions
5B-5 Engine Control Module (ECM) and
5B-6 Delco EST Distributor System
5B-7 Spark Management
High Energy Ignition with Ignition
5B-7 Control (IC)
Modes Of Operation
5B-8 Distributor Module Mode
5B-8 ECM Control Mode
5B-9 Base Ignition Timing
5B-9 Results of Incorrect Operation
Fuel Metering System
General Description
Cool Fuel Systems
Modes of Operation
454/502 Mag MPI and 8.2L MPI
Multi-Port Injection Components
7.4L MPI Multi-Port Injection
Components
. . . . . . . . . . . . . . .
. . . .
. . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . .
. . . . . .
. . . . . . . . . . . .
.
. . . . .
. . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . .
. . . . . . . . . . .
. . . . . . . . . . . . . . .
. . . . . . . . . . . . . .
. . . . . .
. . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . .
. . .
. . . . . . . . . . . . . . . . . . . .
5B-15
5B-15
5B-15
5B-15
5B-16
5B-18
5B-19
5B-20
5B-25
5
5B-27
B
5B-27
5B-27
5B-29
5B-29
5B-30
5B-32
5B-33
5B-33
5B-33
5B-33
5B-35
5B-39
Page 5B-1