PleasureCraft Engine Group 5.0L User Manual

5.0/5.7/6.0L/8.1L ECM and Sensors 2 - 1
MEFI 4 - PCM
Marine Electronic Fuel Injection (MEFI)
Section 2
Engine Control Module (ECM) and Sensors
This section will describe the function of the Engine Control Module (ECM) and the sensors. The section explains
how voltages reflect the inputs and outputs of the ECM. The sensors are described how they operate and how
to replace them.
Contents
Throttle Position (TP) Sensor....................Page 8
Intake Air Temperature (IAT) Sensor .........Page 8
Ignition Control (IC) Reference..................Page 8
Knock Sensor ............................................Page 9
Discrete Switch Inputs...............................Page 9
Diagnosis ............................................................Page 10
Engine Control Module (ECM).......................Page 10
On-Board Service ...............................................Page 10
Engine Control Module (ECM)
Replacement..................................................Page 10
System Relay.................................................Page 11
Fuel Pump Relay ...........................................Page 11
Starter Relay..................................................Page 11
Engine Coolant Temperature (ECT)
Sensor............................................................Page 12
Manifold Absolute Pressure (MAP)/Intake Air
Temperature (IAT) Sensor (5.0/5.7L) .............Page 13
Manifold Absolute Pressure (MAP)
Sensor (6.0/8.1L) ...........................................Page 14
Throttle Position (TP) Sensor.........................Page 16
Idle Air Control (IAC) Valve............................Page 17
Knock Sensor (KS) (5.0/5.7L)........................Page 18
Knock Sensors (KS) (6.0L)............................Page 18
Torque Specifi cations ........................................Page 20
General Description .............................................Page 2
Computers and Voltage Signals.......................Page 2
Analog Signals.................................................Page 2
Three-Wire Sensors ..................................Page 2
Two-Wire Sensors .....................................Page 2
Digital Signals ..................................................Page 3
Switch Types..............................................Page 3
Pulse Counters..........................................Page 3
Engine Control Module (ECM).........................Page 4
ECM Function............................................Page 4
Memory .....................................................Page 4
ROM ..........................................................Page 4
RAM...........................................................Page 4
EEPROM...................................................Page 4
Speed Density System ....................................Page 5
Speed........................................................Page 5
Density.......................................................Page 5
ECM Inputs and Sensor Descriptions..............Page 5
Input Components............................................Page 5
Output Components.........................................Page 5
MEFI Inputs and Outputs ..........................Page 6
Engine Coolant Temperature (ECT)
Sensor.......................................................Page 7
Manifold Absolute Pressure (MAP)
Sensor.......................................................Page 7

PleasureCraft Engine Group 5.0L Specifications

General

Brand	PleasureCraft Engine Group
Model	5.0L
Category	Engine
Language	English