803716A 2 Mercury STARTER ASSEMBLY, Recoil

Interface Harnesses
Illustration 1 g02527560
Components of the power distribution circuits (right side engine view)
(1) Control box connectors for the interface harness to the low current power distribution panel and the high current power distribution panel
(2) Control box
(3) Low current power distribution panel
(4) High current power distribution panel Interface harnesses are used to route the power from the power distribution panels to the control box and other electrical or electronic components.Low Current Power Distribution Panel
Illustration 2 g02528017
Locations of the circuit breakers, relays, and connections that are in the low current power distribution panel
(5) 20 Amp breaker for the primary ECM
(6) Power relay for the primary ECM circuit
(7) Power relay for the secondary ECM circuit
(8) 20 Amp breaker for the secondary ECM
(9) 20 Amp breaker for the #1 auxiliary power circuit to the Engine Interface Connector (EIC)
(10) 20 Amp breaker for the #2 auxiliary power circuit to the Engine Interface Connector (EIC)
(11) 20 Amp breaker (unused)
(12) 6 Amp breaker for the Aftercooler Temperature Control Module (ATCM)
(13) 6 Amp breaker for the Temperature Control Module (TCM)
(14) 6 Amp breaker for the keyswitch circuit for the secondary ECM
(15) 10 Amp circuit breaker for the override control relays
(16) 6 Amp circuit breaker for the digital return (No. 2)
(17) 6 Amp breaker for the keyswitch circuit for the primary ECM
(18) 6 Amp circuit breaker for the digital return (No. 1)
(19) Connections for the secondary keyswitch relay
(20) Connections for the primary keyswitch relay
(21) Primary power distribution block
(22) Secondary power distribution block The low current power distribution panel is used to accommodate the fuses, the circuit breakers, and the relays. The low current panel is for electrical components that draw less than 25 A of current.High Current Power Distribution Panel
Illustration 3 g03671061
Locations of the circuit breakers and switches that are at the high current power distribution panel
(23) 40 Amp circuit breaker for the main power (primary)
(24) 40 Amp circuit breaker for the main power (secondary)
(25) Secondary starting motor magnetic switch (optional)
(26) 30 Amp circuit breaker for the prelube pump (optional)
(27) 40 Amp circuit breaker for the starting system (optional)
(28) Primary starting motor magnetic switch (optional) The high current power distribution panel is used to accommodate the circuit breakers, the relays, and the switches. The high current panel is for electrical components that draw current that is equal to or greater than 25 A.Controllers
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Diagram of the Engine Management System (EMS) on P6L1-01030
(1) Secondary engine ECM
(2) Control assembly
(3) Primary engine ECM
(4) Local CAN data link
(5) Global CAN data link
(6) Caterpillar Electronic Technician (ET)
(7) Temperature Control Module (TCM) for the engine coolant
(8) TCM for the Separate Circuit After Cooler (SCAC)
(10) Primary controller for the fuel control valve
(11) Secondary controller for the fuel control valve
(12) Exhaust temperature module
(12) Engine interface connector (70-pin connector)
(13) Interconnect harness
(14) Color Multi-Purpose Display (CMPD) and PL100T Communications Module
(15) Cat ET
Illustration 5 g03645538
Diagram of the Engine Management System (EMS) on
P6L01031-Up
P5P1-Up
(1) Secondary engine ECM
(2) Primary engine ECM
(3) Local CAN data link
(4) Global CAN data link
(5) Caterpillar Electronic Technician (ET)
(6) Temperature Control Module (TCM) for the engine coolant
(7) TCM for the Separate Circuit After Cooler (SCAC)
(8) Primary controller for the fuel control valve
(9) Secondary controller for the fuel control valve
(10) Exhaust temperature module
(11) Engine interface connector (70-pin connector)
(12) Interconnect harness
(13) Color Multi-Purpose Display (CMPD) and PL100T Communications Module
(14) Cat ET This engine is designed for electronic control of most engine operating functions. The Engine Management System (EMS) provides this control. The EMS is made up of a network of electronic controllers. These controllers communicate through the data link network to share information that is related to the operation of the engine. The EMS also provides information to external devices, such as the operator display panel. The electronic system consists of the control modules that make up the EMS, the wiring harness, switches, sensors, and fuel injectors. The control modules receive information from the sensors and the switches on the engine. The information is shared over the data link. This information is then processed in order to provide engine control. Refer to Troubleshooting, "Data Link Features" for an overview of the data links for this engine.Primary and Secondary Electronic Control Module (ECM)
Illustration 6 g01496913
Engine ECM
The engine ECM consists of two main components, the control computer (hardware) and the flash file (software). The control computer consists of a microprocessor and electronic circuitry. The flash file contains the engine operational characteristics. The operating maps that influence the engine performance are also contained in the flash file.The engine ECM provides engine control by altering the signal that is sent to the fuel injector solenoids. By controlling the signal timing and duration, the engine