BELT-SERPENTINE 1925479 - Caterpillar

The Electronic Control Module (ECM) and the sensors are located on the left side of the engine. Refer to Figure 1.
Illustration 1 g01459770
Sensor locations on the C4.4 engine
(1) Fuel Rail Pressure Sensor
(2) Intake Manifold Air Temperature Sensor
(3) Electronic Control Module (ECM)
(4) Primary Speed/Timing Sensor
(5) Oil Pressure Sensor
(6) Oil Pressure Sensor (alternative location)
(7) Secondary Speed/Timing Sensor
(8) Solenoid for the Fuel Rail Pump
(9) Intake Manifold Pressure Sensor
(10) Intake Manifold Pressure Sensor (alternative location)
(11) Coolant Temperature Sensor Note: The wastegate regulator is installed on the right side of the engine.
Illustration 2 g01459772
Close up views of sensor locations on the C4.4 engine
Table 1
Connector Function
P1 Machine Harness to ECM Connector (64 Pin Connector)
P2 Engine Harness to ECM Connector (64 Pin Connector)
P532 Fuel Rail Pump Solenoid Connector (2 Pin Connector)
P402 Secondary Speed/Timing Sensor (2 Pin Connector)
P401 Primary Speed/Timing Sensor (2 Pin Connector)
P201 Engine Oil Pressure Sensor (3 Pin Connector)
P228 Fuel Rail Pressure Sensor (3 Pin Connector)
P200 Intake Manifold Pressure Sensor (3 Pin Connector)
P103 Intake Manifold Air Temperature Sensor (2 Pin Connector)
P100 Coolant Temperature Sensor (2 Pin Connector)
J23 Diagnostic Connector (if equipped)
P691/J691 Electronic Unit Injectors for No. 1 and No. 2 Cylinders (4 Pin Connector)
P692/J692 Electronic Unit Injectors for No. 3 and No. 4 Cylinders (4 Pin Connector)
P511 Wastegate regulator (2 Pin Connector)
Illustration 3 g01459757
C4.4 engine
(1) Electronic Unit Injector
(2) Solenoid for the Fuel Rail Pump
(3) Wastegate Regulator
(4) Secondary Speed/Timing Sensor
(5) Fuel Rail Pump
(6) Primary Speed/Timing Sensor
(7) Intake Manifold Pressure Sensor
(8) Electronic Control Module (ECM)
(9) Fuel Rail Pressure Sensor
(10) Engine Oil Pressure Sensor
(11) Intake Manifold Air Temperature Sensor
(12) Coolant Temperature Sensor