Component Location
Electronic Control Circuit Diagram
Engine ECM
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| Illustration 1 | g06136193 |
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Sensors and components that are connected to the engine ECM | |
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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 |
| Ether Solenoid | Compression Brake Solenoids |
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| Component Name Conversion to the Electronic Service Tool | |
| Caterpillar ET Display Component Name | Troubleshooting Guide Component Name |
| Engine charge air cooler #1 outlet temperature | Charge air cooler outlet temperature |
| EGR differential pressure | NRS differential pressure sensor |
| EGR intake pressure (absolute) | NRS intake pressure sensor |
| EGR temperature | NRS temperature sensor |
| EGR valve | NRS valve |
| DPF #1 intake pressure | DPF intake pressure |
| DPF #1 intake temperature | DPF inlet temperature sensor |
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| Illustration 2 | g03744018 |
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Sensor and component locations on the left side of the C7.1 engine (1) Coolant temperature sensor (2) Fuel temperature sensor (3) Solenoid for the high-pressure fuel pump (4) Intake manifold air temperature sensor (5) Intake manifold pressure sensor (6) Fuel rail pressure sensor (7) Electronic Control Module (ECM) (8) Barometric pressure sensor (9) Primary speed/timing sensor (10) Oil pressure sensor | |
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| Illustration 3 | g03744022 |
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Close up views of sensor and component locations on the left side of C7.1 engine (1) Coolant temperature sensor (2) Fuel temperature sensor (3) Solenoid for the high-pressure fuel pump (4) Intake manifold air temperature sensor (5) Intake manifold pressure sensor (6) Fuel rail pressure sensor (7) Electronic Control Module (ECM) (8) Barometric pressure sensor (9) Primary speed/timing sensor (10) Oil pressure sensor | |
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| Illustration 4 | g03744037 |
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Sensor and component locations on the right side and top of a typical C7.1 engine (11) NOx Reduction System (NRS) differential pressure sensor (12) NRS inlet pressure sensor (13) NRS inlet temperature sensor (14) NRS valve including a position sensor (15) Wastegate regulator (16) Turbocharger outlet temperature sensor (17) Secondary speed/timing sensor (18) Exhaust Back Pressure Regulator (EBPR) | |
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| Illustration 5 | g03744047 |
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Close up views of sensor locations on the top of a typical C7.1 engine (11) NOx Reduction System (NRS) differential pressure sensor (12) NRS inlet pressure sensor (13) NRS inlet temperature sensor (14) NRS valve including a position sensor (15) Wastegate regulator (18) Exhaust Back Pressure Regulator (EBPR) | |
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| Illustration 6 | g03744057 |
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Sensors and components on the Integrated Clean Emissions Module (IG CEM) (view 1) (19) Diesel Particulate Filter (DPF) outlet NOx sensor (20) Soot sensor antenna (21) SCR intake temperature probe (22) Aftertreatment ID module (23) Temperature sensor (24) Diesel Exhaust Fluid (DEF) injector | |
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| Illustration 7 | g03744494 |
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Sensors and components on the Integrated Clean Emissions Module (IG CEM) (view 2) (25) DPF intake temperature probe | |
Pump, Electronics, and Tank Unit (PETU)
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| Illustration 8 | g03744500 |
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Sensors and components on the Pump, Electronics, and Tank Unit (PETU) (26) DEF tank temperature, level, and quality sensor (27) 4-pin connector (28) 12-pin connector (29) Power relay for heated DEF lines (30) Power relay for DCU (31) Coolant diverter valve | |
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| Illustration 9 | g03744516 |
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Sensors and components on the Pump, Electronics, and Tank Unit (PETU) (32) Dosing Control Unit (DCU) (33) Voltage Load Protection Module (VLPM) (34) DCU connector | |
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