PANEL-OUTER 2532539 - Caterpillar

Electronic Control Circuit Diagram
Illustration 1 g03838794
Electronic control circuit diagram
Sensor Locations
The Electronic Control Module (ECM) and most of the engine sensors are located on the left side of the engine. For C4.4 engines, refer to Illustration 2. For C7.1 engines, refer to Illustration 4.For the remaining sensors that are attached to the C7.1 engine, refer to Illustration 6.Note: In the following illustrations, some components have been removed in order to improve visibility.
Illustration 2 g03519477
Sensor locations on the left side of the C4.4 engine
(1) Coolant temperature sensor
(2) Intake manifold pressure sensor
(3) Solenoid for the high-pressure fuel pump
(4) Intake manifold air temperature sensor
(5) Fuel rail pressure sensor
(6) Electronic Control Module (ECM)
(7) Primary speed/timing sensor
(8) Oil pressure sensor
(9) Secondary speed/timing sensor
Illustration 3 g03519480
Close up views of sensor locations on the left side of the C4.4 engine
(1) Coolant temperature sensor
(2) Intake manifold pressure sensor
(3) Solenoid for the high-pressure fuel pump
(4) Intake manifold air temperature sensor
(5) Fuel rail pressure sensor
(6) Electronic Control Module (ECM)
(7) Primary speed/timing sensor
(8) Oil pressure sensor
(9) Secondary speed/timing sensor
Illustration 4 g03338328
Sensor locations on the left side of the C7.1 engine
(1) Coolant temperature sensor
(2) Solenoid for the high-pressure fuel pump
(3) Intake manifold pressure sensor
(4) Intake manifold air temperature sensor
(5) Fuel rail pressure sensor
(6) Wastegate regulator
(7) Primary speed/timing sensor
(8) Oil pressure sensor
(9) Electronic Control Module (ECM)
Illustration 5 g03338348
Close up views of sensor locations on the left side of the C7.1 engine
(1) Coolant temperature sensor
(2) Solenoid for the high-pressure fuel pump
(3) Intake manifold pressure sensor
(4) Intake manifold air temperature sensor
(5) Fuel rail pressure sensor
(6) Wastegate regulator
(7) Primary speed/timing sensor
(8) Oil pressure sensor
(9) Electronic Control Module (ECM)
Illustration 6 g03338385
Sensor locations on the right side of the C7.1 engine
(10) Secondary speed/timing sensor