C9.3 Tier 4 Final Engines Caterpillar

Component Location

Usage:

D6T 2B3

Electronic Control Circuit Diagram

A4:E4 ECM

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Illustration 1	g03332728

A5:E2 ECM

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Illustration 2	g03332721

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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

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Table 2
Component Name Conversion to Caterpillar ET Display Name
Caterpillar 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	NRS 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

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Illustration 3	g03750027

View A

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Illustration 4	g03750030
(1) Coolant temperature sensor

View B

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Illustration 5	g03750031
(2) Intake manifold pressure sensor

View C

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Illustration 6	g03750034
(3) Fuel rail pressure sensor

View D

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Illustration 7	g03750036
(4) NRS temperature sensor (5) NRS differential pressure sensor (6) NRS absolute pressure sensor

View E

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Illustration 8	g03750038
(7) Atmospheric pressure sensor (8) Outlet temperature sensor for the charge air cooler

View F

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Illustration 9	g03750039
(9) Oil pressure sensor

View G

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Illustration 10	g03750040
(10) Crankcase pressure sensor

View H

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Illustration 11	g03750041
(11) Primary speed-timing sensor (top) (12) Secondary speed-timing sensor (bottom)

View I

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Illustration 12	g03750042
(13) Unfiltered fuel pressure (14) Fuel temperature sensor (15) Filtered fuel pressure

Clean Emission Module (CEM) Side View

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Illustration 13	g03750043
CEM ( typical ) (1) DOC/Inlet Cap (2) DPF inlet temperature sensor (3) Diesel Particulate Filter (4) DPF Outlet cap (5) SCR Outlet cap (6) Exhaust outlet (7) SCR Inlet Cap

CEM Control Panel

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Illustration 14	g03750046
CEM control panel ( typical ) (1) Combustion air intake (2) Differential pressure port (3) ARD Nozzle heater relay (4) Combustion air inlet pressure sensor (5) Differential pressure sensor (6) Temperature sensor (7) Differential pressure port (8) Aftertreatment identification module (9) CEM Harness connector (10) Pilot fuel solenoid (11) Main fuel solenoid (12) Coolant in/out (13) Pilot fuel pressure sensor (14) Main fuel pressure sensor (15) Coil for the spark plug (16) Combustion air control group

ARD Head and Dosing Unit Overview

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Illustration 15	g03750047
(1) Flame detection temperature sensor (2) Heated nozzle port (3) Pilot fuel filter/fitting (4) Main fuel filter/fitting (5) ARD head (6) Spark plug (7) Coolant in/out (8) Ground point (9) Combustion air inlet

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Illustration 16	g03750048
(10) Diverter valve (11) Priming Pump (12) Pressure regulator

DEF Dosing Unit (Top)

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Illustration 17	g03750049
(1) Coolant Supply Fitting (2) Line Heater #1 Connector (3) Line Heater #3 Connector (4) Coolant Supply to DEF Header (5) Suction Line (Line Heater #3) (6) DEF Header (7) Backflow Line (Line heater #1) (8) Coolant Supply to DEF Pump (9) DEF Header Connector (10) Coolant Return Fitting (11) Pressure Line Connection (Line Heater #2)

DEF Dosing Unit (Right Side)

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Illustration 18	g03750051
(1) DEF Filter Housing Cover (2) Sensor Interface Harness (3) Power Supply Harness (4) Coolant Return Fitting (5) Diesel Exhaust Fluid Control Unit (DCU) (6) 86 pin Connector (7) 53 pin Connector (8) Voltage Load Protection Module (VLPM)

DEF Dosing Unit (Left Side)

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Illustration 19	g03750052
(1) Line Heater Relay (2) Main Power Relay (3) Coolant Supply Fitting (4) Coolant Diverter Valve (5) DEF Pump (6) Coolant Return Fitting (7) Power Supply Harness (8) Sensor Interface Harness (9) Terminating Resistor (10) DEF Filter Housing Cover