Engine Wiring Diagram for John Deere Electronic Control Unit
(ECU) - 12V or 24V

RG18057-UN-09FEB10
Engine Start Components
C16 - Battery
C06 - Alternator Excitation
G1 - Alternator 12 Volt
C17 - Single Point Ground
M1 - Start Motor 12 Volt
C14 - Starter Relay 12 Volt
C13 - Starter Relay 24 Volt
F03 - 15 Amp Fuse
F02 - 20 Amp Fuse
F01 - 30 Amp Fuse
C15 - Remote On/Off
C12 - TVP

RG18091-UN-10FEB10
Focus Level 14 ECU (Left Side of Diagram)
C19 - Fuel Filter Control/Diagnostic/Power/Ground
P05 - Fuel Rail Pressure Sensor
D01 - Water in Fuel Sensor
T04 - Coolant Temperature Sensor
T05 - Fuel Temperature Sensor
P03 - Fuel Pressure Sensor (high)
P01 - Manifold Air Pressure Sensor
P04 - Oil Pressure Sensor
J3 - 32 Position - Blue
J2 - 48 Position - Brown
J1 - 32 Position - Black
C08 - Auxiliary Connector
5042 - Unswitched Power
5050 - Ground
5457 - Transfer Pump Speed Command
5458 - Transfer Pump Motor Current
5434 - Transfer Pump Status Input (+5 volt)
5486 - Driver 6
5475 - Analog 6
5946 - Excitation Voltage #1
5446 - Excitation Return #1
5414 - Excitation Return #2
5461 - Analog 8
5428 - Analog 2
5469 - Analog 5
5468 - Analog 3
5467 - Analog 4
5416 - Excitation Voltage #2
5911 - Sensor Excitation (+5 volt)
5012 - Switched power
5714 - Sensor Return
5971 - Cruise Cancel / Resume
5954 - Cruise On
5913 - Secondary Analog Throttle
5012 - Stop Lamp Power
5012 - Cruise Common
5939 - External Derate
5941 - External Shutdown
5917 - Remote Cruise
5948 - Customer Loss of Coolant
5436 - Air Filter Restriction Switch
5943 - Cruise Brake
5937 - Isochronous Governor
5714 - External Derate / Shutdown Common
5981 - PWM Throttle
5431 - Frequency Input
5473 - Stop Lamp
5050 - Single Point Ground

RG18092-UN-10FEB10
Focus Level 14 ECU (Right Side of Diagram)
X01 - Engine Crankshaft Sensor
X02 - Engine Camshaft Sensor
T02 - Manifold Air Temperature Sensor
C01 - Fuel Injector Harness
Y01 - Pump Control Valve (12/24 volt)
J3 - 32 Position - Blue
J2 - 48 Position - Brown
J1 - 32 Position - Black
C10 - CAN Terminator
C09 - Control Panel Connector
C11 - Diagnostic Connector
5448 - Return
5443 - Return
5456 - Analog 15
5474 - Excitation Return Delta Temperature
5493 - Cylinder 1
5494 - Cylinder 2
5495 - Cylinder 3
5497 - Cylinder 4
5498 - Cylinder 5
5499 - Cylinder 6
5419 - Driver Low
5424 - Driver High
5474 - Wait to Start
5032 - Fused Unswitched Power
5814 - Sensor Return
5422 - Start
5050 - Ground
5020 - Can Shield
5012 - Ignition
5916 - Warning Lamp
5412 - Accelerator
5439 - Tachometer
5915 - Analog Throttle
5616 - Excitation Voltage (+5 volt)
5918 - Override Shutdown
5714 - Override Shutdown Return
5947 - Throttle Switch
5714 - Sensor Return
5936 - Resume Coast / Bump Down
5905 - CAN Low
5904 - CAN High
5955 - Set Accelerator / Bump Up
5923 - Bump Enable
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JR74534,0000233-19-20100210
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