Mercury MerCruiser MCM 454 Mag MPI Service Manual page 426

SERVICE MANUAL NUMBER 23
MEFI 2 MIE (Inboard) 7.4L MPI Model
NOTE: All BLACK wires with a ground symbol are interconnected within the EFI system
harness.
3
9
20
15
16
1 - Fuel Pump
2 - Distributor
3 - Coil
4 - Electronic Spark Control Module
5 - Data Link Connector (DLC)
6 - Manifold Absolute Pressure (MAP) Sensor
7 - Knock Sensor
8 - Idle Air Control (IAC)
9 - Throttle Position (TP) Sensor
10 - Engine Coolant Temperature (ECT) Sensor
11 - Electronic Control Module (ECM)
12 - Fuel Pump Relay
Index
90-861326--1 MARCH 1999
Downloaded from https://needmanual.com/
2
7
8
10
6
17
11
5
4
13
13 - Ignition/System Relay
14 - Fuse (15 Amp) Fuel Pump Fuse (15 Amp)
ECM / DLC / Battery Fuse (10 Amp) ECM /
Injector / Ignition / Knock Module
15 - Harness Connector To Starting/Charging
Harness
16 - Positive (+) Power Wire To Engine Circuit
Breaker
17 - Intake Air Temperature (IAT) Sensor
18 - Not Used
19 - Water Temperature Sender (Gauge)
20 - Oil Pressure - Audio Warning Switch
WIRING DIAGRAMS
18
14
12
1
Page 4E-15
19
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