Component Location
Electronic Control Circuit Diagram
A4:E4 ECM
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| Illustration 1 | g03332728 |
A5:E2 ECM
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| Illustration 2 | g03332721 |
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| Additional Components That May Be Applicable For Certain Applications | |
| Throttle Position Sensor | Cooling Fan Solenoid |
| Ambient Air Temperature Sensor | Engine Fan Reversing Solenoid |
| Coolant Level Sensor | Air Filter Restriction Pressure Sensor |
| Either Solenoid | Compression Brake Solenoids |
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| Component Name Conversion to Caterpillar ET Display Name | |
| Caterpillar ET Display Component Name | Troubleshooting Guide Component Name |
| Engine charge air cooler #1 outlet temperature | Charge air cooler outlet temperature |
| ARD fuel flow diverter actuator status | ARD fuel diverter valve |
| EGR differential pressure | NRS delta pressure sensor |
| EGR intake pressure (absolute) | NRS absolute pressure sensor |
| EGR temperature | NRS temperature sensor |
| EGR valve | NRS actuator |
| Engine exhaust manifold bank #1 flow balance valve solenoid | Balance valve solenoid |
| DPF #1 intake pressure | DPF intake pressure |
| DPF #1 intake temperature | DPF inlet temperature sensor |
| ARD fuel pressure #1 | Pilot fuel pressure sensor |
| ARD fuel pressure #2 | Main fuel pressure sensor |
| Aftertreatment #1 ignition transformer | ARD ignition coil |
| Aftertreatment #1 fuel injector #1 heater | Heated nozzle |
| Aftertreatment #1 exhaust gas temperature #1 | Flame detection temperature sensor |
| Aftertreatment #1 secondary air pressure | Combustion air inlet pressure sensor |
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| Illustration 3 | g03750027 |
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| Illustration 4 | g03750030 |
| (1) Coolant temperature sensor | |
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| Illustration 5 | g03750031 |
| (2) Intake manifold pressure sensor | |
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| Illustration 6 | g03750034 |
| (3) Fuel rail pressure sensor | |
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| Illustration 7 | g03750036 |
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(4) NRS temperature sensor
(5) NRS differential pressure sensor (6) NRS absolute pressure sensor | |
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| Illustration 8 | g03750038 |
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(7) Atmospheric pressure sensor
(8) Outlet temperature sensor for the charge air cooler | |
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| Illustration 9 | g03750039 |
| (9) Oil pressure sensor | |
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| Illustration 10 | g03750040 |
| (10) Crankcase pressure sensor | |
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| Illustration 11 | g03750041 |
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(11) Primary speed-timing sensor (top)
(12) Secondary speed-timing sensor (bottom) | |
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| Illustration 12 | g03750042 |
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(13) Unfiltered fuel pressure
(14) Fuel temperature sensor (15) Filtered fuel pressure | |
Clean Emission Module (CEM) Side View
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| Illustration 13 | g03750043 |
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CEM ( typical ) (1) DOC/Inlet Cap (2) DPF inlet temperature sensor (3) Diesel Particulate Filter (4) DPF Outlet cap (5) SCR Outlet cap (6) Exhaust outlet (7) SCR Inlet Cap | |
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| Illustration 14 | g03750046 |
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CEM control panel ( typical ) (1) Combustion air intake (2) Differential pressure port (3) ARD Nozzle heater relay (4) Combustion air inlet pressure sensor (5) Differential pressure sensor (6) Temperature sensor (7) Differential pressure port (8) Aftertreatment identification module (9) CEM Harness connector (10) Pilot fuel solenoid (11) Main fuel solenoid (12) Coolant in/out (13) Pilot fuel pressure sensor (14) Main fuel pressure sensor (15) Coil for the spark plug (16) Combustion air control group | |
ARD Head and Dosing Unit Overview
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| Illustration 15 | g03750047 |
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(1) Flame detection temperature sensor
(2) Heated nozzle port (3) Pilot fuel filter/fitting (4) Main fuel filter/fitting (5) ARD head (6) Spark plug (7) Coolant in/out (8) Ground point (9) Combustion air inlet | |
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| Illustration 16 | g03750048 |
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(10) Diverter valve
(11) Priming Pump (12) Pressure regulator | |
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| Illustration 17 | g03750049 |
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(1) Coolant Supply Fitting
(2) Line Heater #1 Connector (3) Line Heater #3 Connector (4) Coolant Supply to DEF Header (5) Suction Line (Line Heater #3) (6) DEF Header (7) Backflow Line (Line heater #1) (8) Coolant Supply to DEF Pump (9) DEF Header Connector (10) Coolant Return Fitting (11) Pressure Line Connection (Line Heater #2) | |
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| Illustration 18 | g03750051 |
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(1) DEF Filter Housing Cover
(2) Sensor Interface Harness (3) Power Supply Harness (4) Coolant Return Fitting (5) Diesel Exhaust Fluid Control Unit (DCU) (6) 86 pin Connector (7) 53 pin Connector (8) Voltage Load Protection Module (VLPM) | |
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| Illustration 19 | g03750052 |
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(1) Line Heater Relay
(2) Main Power Relay (3) Coolant Supply Fitting (4) Coolant Diverter Valve (5) DEF Pump (6) Coolant Return Fitting (7) Power Supply Harness (8) Sensor Interface Harness (9) Terminating Resistor (10) DEF Filter Housing Cover | |
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| Illustration 20 | g03750053 |
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(1) DEF Injector
(2) Coolant Lines | |
Caterpillar Information System:
966M Tier 4, 966M Tier 4 Series XE, 972M Tier 4 and 972M Tier 4 Series XE Wheel Loaders Brake Accumulator - Disassemble
259D, 279D, 289D, 299D and 299D XHP Compact Track Loaders, 257D, 277D, 287D, 297D and 297D XHP Multi Terrain Loaders and 236D, 242D, 246D, 262D, 272D and 272D XHP Skid Steer Loaders Machine Systems Refrigerant Accumulator - Remove and Install
2013/02/22 Modified Oil Tubes, Adapter, and Elbows Are Used to Help Reduce the Possibility of Contamination on Certain 3500 Engines {1306, 1308}
The Air Inlet Tube Assembly May Fail on 770G and 772G Off-Highway Trucks{1051, 1054, 7452} The Air Inlet Tube Assembly May Fail on 770G and 772G Off-Highway Trucks{1051, 1054, 7452}
2384C, 2484C, 559C and 579C Knuckleboom Loaders Fuel Filter and Water Separator - Remove and Install
C3.3B Engines for Caterpillar Built Machines Rocker Shaft and Push Rod - Remove and Install
C3.3B Engines for Caterpillar Built Machines Rocker Shaft - Assemble
814K, 816K, 826K 836K Landfill Compactors, 815K, 825K, Soil Compactors, 824K, 834K, 844K, 854K Wheel Dozers and 986K, 988K, 990K, 992K,994K Wheel Loaders Information Display Menu Structure
C3.3B Engines for Caterpillar Built Machines Rocker Shaft - Disassemble
RM-300 Reclaimer Mixer and RM-500 Road Reclaimer/Soil Stabilizer Machine Electronic Control System System Schematic
C3.3B Engines for Caterpillar Built Machines Camshaft and Valve Lifters - Remove and Install
C3.3B Engines for Caterpillar Built Machines Camshaft Gear - Remove and Install
793F CMD Off-Highway Truck (Command for Hauling) Power Train Electronic Control System MID 081 - CID 0041 - FMI 03
793F CMD Off-Highway Truck (Command for Hauling) Power Train Electronic Control System MID 081 - CID 0041 - FMI 04
2384C, 2484C, 559C and 579C Knuckleboom Loaders Engine Oil Filter and Base - Remove and Install
Field Installation of the 387-6455 Auxiliary Lines Kit , 387-6456 Auxiliary Lines Kit , and 387-6457 Auxiliary Lines Kit {5057} Field Installation of the 387-6455 Auxiliary Lines Kit , 387-6456 Auxiliary Lines Kit , and 387-6457 Auxiliary Lines Kit {5057}
C175-16 and C175-20 Engines for Caterpillar Built Machines High Pressure Fuel Rails - Remove and Install
2384C, 2484C, 559C and 579C Knuckleboom Loaders Secondary Fuel Filter and Base - Remove and Install
2014/08/11 New Helical Gears are Used on Certain 3500 Off-Highway Truck Engines {1204, 1206}
2014/05/30 An Improved Rocker Arm Assembly Is Used on C27 and C32 Machine Engines {1102, 1123}
2014/05/30 Improved Camshafts Are Now Used on Certain C27 and C32 Machines {1210}
A New Oil Fill Group Is Now Used on Certain Wheel Feller Bunchers{1316} A New Oil Fill Group Is Now Used on Certain Wheel Feller Bunchers{1316}
Air Conditioning Functionality and Electrical Module Protection{1408, 7301, 7320} Air Conditioning Functionality and Electrical Module Protection{1408, 7301, 7320}
C1.5 and C2.2 Engines for Caterpillar Built Machines Diesel Particulate Filter - Clean