REAR STRUCTURE 5P8955 - Caterpillar

Illustration 1 g01688895
Left side of the engine
(1) Fuel enable valve
(2) Fuel temperature sensor
(3) Intake manifold pressure sensor
(4) Intake manifold air temperature sensor
(5) Fuel pressure sensor (If equipped)
(6) Absolute pressure sensor for Cooled Gas Induction (CGI) system
(7) Differential pressure sensor for CGI system
(8) Pilot fuel control solenoid
(9) Main fuel control solenoid
(10) Pilot fuel pressure sensor
(11) Main fuel pressure sensor
(12) After Treatment Regeneration Device (ARD) fuel manifold
(13) ECM P2 connector
(14) ECM P1 connector
(15) 6-pin connectors for the OEM harness to the diesel particulate filter (DPF)
(15) 2-pin connector for the OEM harness for the electrical harness of the ARD purge air pump
(16) ECM
(17) ARD purge air pump
(18) Oil pressure sensor
(19) Speed/timing sensor for the crankshaft
(20) Crankcase pressure sensor
(21) Secondary speed/timing sensor (camshaft)
Illustration 2 g01698613
Right side of the engine
The intake valve actuation pressure sensor is underneath the valve cover.
(22) Control group for the CGI system
(23) Differential pressure sensor for the combustion air supply
(24) Control group for the combustion air system
(25) Coolant temperature sensor
(26) Ignition coil for the ARD
(27) Temperature sensor for the CGI system
(28) Flame boundary temperature sensor
(29) Flame detection temperature sensor
(30) Spark plug
(31) Turbocharger outlet temperature
Illustration 3 g01699833
ARD fuel manifold
(9) Main fuel control solenoid
(12) ARD fuel manifold
(8) Pilot fuel control solenoid
(10) Pilot fuel pressure sensor
(11) Main fuel pressure sensor
Illustration 4 g01699914
Typical Diesel Particulate Filter (DPF)
(29) Inlet temperature sensor for the DPF
(30) Connector for the OEM harness from the engine
(31) Sensor group
(32) Outlet temperature sensor for the DPF
(33) Tubes for the measurement of the differential pressure across the DPF Engine Monitoring
The electronic control system includes engine monitoring. The system monitors engine oil pressure, coolant temperature and coolant level. All On-Highway engines are shipped from the factory with the following sensors: engine oil pressure sensor and coolant temperature sensor. The Original Equipment Manufacturer (OEM) is responsible for providing and installing the coolant level sensor. The coolant level sensor is the only sensor that can be individually selected for engine monitoring. The software for the Engine Control Module (ECM) contains a customer programmable parameter that enables the coolant level sensor. The default factory setting is "NO". The ECM customer programmable parameters have three levels that are for engine monitoring:
Warning (factory default)
Engine derate
Engine shutdownWarning Mode
Warning mode uses the following sensors: engine oil pressure, coolant temperature and optional coolant level sensor. When a diagnostic code is active, the amber warning lamp will flash and the warning lamp will come on.Engine Derate and Engine Shutdown
The engine derate and the engine shutdown allows the ECM to alter engine performance in order to avoid damage to the engine. The engine should return to normal conditions once the problem is corrected. When the engine is derated, the check engine lamp and the warning lamp will flash. For the operating conditions that cause these modes, refer to the appropriate section for the sensor.Electronic Control System Operation
The fuel delivery and injection timing are electronically controlled. In comparison to engines that are controlled mechanically, the electronic control system provides increased control of timing and increased control to the fuel to the air ratio. Injection timing is achieved