898101883 Mercruiser CAP

Illustration 1 g00575581
3408E Electronic control system components (typical example)
(1) Unit injector connector for the No. 5 cylinder and the No. 7 cylinder
(2) Connection for the injection actuation pressure control valve
(3) Unit injector connector for the No. 1 cylinder and the No. 3 cylinder
(4) Atmospheric pressure sensor
(5) Connector for the turbocharger outlet pressure sensor
(6) Atmospheric pressure sensor connector
(7) Vehicle connector
(8) Unit injector connector for the No. 6 cylinder and the No. 8 cylinder
(9) Timing calibration probe connector
(10) ECM connector
(11) ECM connector
(12) Primary engine speed/timing connector
(13) Unit injector connector for the No. 2 cylinder and the No. 4 cylinder
(14) Connector for the injection actuation pressure sensor
(15) Connector for the coolant flow switch
(16) Oil pressure sensor connector
(17) Secondary engine speed/timing connector
(18) Oil temperature sensor
(19) Oil pressure sensor
(20) Secondary speed/timing sensor
(21) Fuel temperature sensor
(22) Connector for the oil temperature sensor
(23) Fuel temperature sensor connector
(24) Injection actuation pressure control valve
(25) Coolant temperature sensor connector
Illustration 2 g00575482
3412E Electronic control system components (typical example)
(1) Unit injector connector for the No. 9 cylinder and the No. 11 cylinder
(2) Unit injector connector for No. 5 cylinder and No. 7 cylinder
(3) Connector for the injection actuation pressure control valve
(4) Unit injector connector for No. 1 cylinder and No. 3 cylinder
(5) Atmospheric pressure sensor
(6) Connector for the turbocharger compressor outlet pressure sensor
(7) Atmospheric pressure sensor connector
(8) Unit injector connector for No. 10 cylinder and No. 12 cylinder
(9) Unit injector connector for No. 6 cylinder and No. 8 cylinder
(10) Vehicle connector
(11) Timing calibration probe connector
(12) Connector for the speed/timing sensor
(13) ECM connector
(14) ECM connector
(15) Unit injector connector for No. 2 cylinder and No. 4 cylinder
(16) Connector for the injection actuation pressure sensor
(17) Oil pressure sensor connector
(18) Connector for the secondary speed/timing sensor
(19) Oil temperature sensor
(20) Oil pressure sensor
(21) Secondary speed/timing sensor
(22) Fuel temperature sensor
(23) Connector for the oil temperature sensor
(24) Fuel temperature sensor connector
(25) Injection actuation pressure control valve
(26) Coolant temperature sensor connector
(27) Connector for the coolant flow switch
(28) Coolant flow switch Electronic Control Module (ECM)
Illustration 3 g00554256
Electronic Control Module for an ADEM II engine
(1) ECM connector ("P2")
(2) Electronic Control Module (ECM)
(3) ECM connector ("P1") The engine uses an Electronic Control Module (ECM) that is based on a microprocessor. The ECM is mounted on the left rear side of the cylinder block.The inputs and the outputs to the control module are designed to withstand the short circuits to the battery voltage without damage to the control. The electronic engine control system has the following features that are designed into the system.
Resistance to radio frequency
Resistance to electromagnetic interferenceThe ECM power supply provides electrical power to all engine mounted sensors and actuators. Reverse voltage polarity protection and resistance to vehicle power system voltage swings or surges have been designed into the ECM. The ECM also monitors all input from the sensors. The ECM also provides the correct outputs in order to ensure desired engine operation.The wiring harness provides communication or signal paths to the various sensors. The ECM performs many functions. The ECM contains all of the engine performance information. The ECM contains all of the information for the emission certification. Several examples are listed: engine timing, air/fuel ratio and rated fuel position control maps.The ECM is programmed to run diagnostic tests in order to separate a fault to a specific circuit. Once a fault is detected, the fault can be displayed on a diagnostic lamp. A multimeter can be used to check most problems. The ECM will log most of the diagnostic codes that are generated during engine operation. The logged codes or the active codes can be read by an electronic service tool. Refer to the Troubleshooting manual for your engine.