C13, C15, and C18 Tier 4 Interim Engines Component Location Caterpillar


Component Location
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Block Diagram



Illustration 1g03588796

Table 1
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 

Sensor Locations

Table 2
Component Name Conversion to AVSpare ET Display Name 
AVSpare 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  EGR 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 


Illustration 2g03777194

View A



Illustration 3g03777199
(1) Coolant temperature sensor

View B



Illustration 4g03777207
(2) Intake manifold pressure sensor

View C



Illustration 5g03777209
(3) Fuel rail pressure sensor

View D



Illustration 6g03777210
(4) NRS temperature sensor
(5) NRS differential pressure sensor
(6) NRS absolute pressure sensor

View E



Illustration 7g06003558
(7) Balance valve solenoid
(8) Atmospheric pressure sensor
(9) Outlet temperature sensor for the charge air cooler

View F



Illustration 8g06003605
(10) Oil pressure sensor

View G



Illustration 9g06003642
(11) Crankcase pressure sensor

View H



Illustration 10g06003634
(12) Primary speed-timing sensor (top)
(13) Secondary speed-timing sensor (bottom)

View I



Illustration 11g06003638
(14) Unfiltered fuel pressure
(15) Fuel temperature sensor
(16) Filtered fuel pressure

Clean Emission Module (CEM) Side View



Illustration 12g03777617
CEM ( typical )
(1) DOC/Inlet Cap
(2) Radio Frequency (RF) antenna
(3) DPF inlet temperature sensor
(4) Diesel Particulate Filter
(5) Radio Frequency (RF) antenna
(6) Outlet cap
(7) Exhaust outlet

CEM Control Panel



Illustration 13g03777619
CEM control panel ( typical )
(1) Differential pressure port
(2) Combustion air inlet pressure sensor port
(3) Combustion air intake
(4) ARD air valve controller
(5) Coil for the spark plug
(6) Combustion air inlet pressure sensor
(7) Combustion air control group
(8) Differential pressure sensor
(9) Differential pressure port
(10) Filter filling
(11) Serial plate
(12) Pilot fuel solenoid
(13) Main fuel solenoid
(14) Pilot fuel pressure sensor
(15) Main fuel pressure sensor
(16) Coolant in/out
(17) Aftertreatment identification module
(18) ARD head

ARD Head Overview



Illustration 14g03777622
ARD combustion head
(1) Flame detection temperature sensor
(2) Electrical connection for the ARD nozzle heater
(3) ARD pilot filter connector
(4) ARD main filter connector
(5) ARD combustion head
(6) ARD spark plug
(7) Coolant flow
(8) Ground point
(9) Combustion air inlet

ARD Electric Pump



Illustration 15g03777637
Electric priming pump
(1) Diverter valve
(2) Priming Pump
(3) Pressure regulator

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