INSTALLER AS - 1U6440 - Caterpillar

Electronic Control Circuit Diagram
Illustration 1 g03725890
Electronic control circuit diagram for an engine with a DOC, DPF, and DEF system
Illustration 2 g03732622
Electronic control circuit diagram for an engine with a DOC and DEF system
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
Ether Solenoid Compression Brake Solenoids Sensor Locations
Table 2
Component Name Conversion to the Electronic Service Tool
Electronic Service Tool Display Component Name Troubleshooting Guide Component Name
Engine charge air cooler #1 outlet temperature Charge air cooler outlet temperature
EGR differential pressure NRS differential pressure sensor
EGR intake pressure (absolute) NRS intake pressure sensor
EGR temperature NRS temperature sensor
EGR valve NRS valve
DPF #1 intake pressure DPF intake pressure
DPF #1 intake temperature DPF inlet temperature sensor Note: In the following illustrations, some components have been removed in order to improve visibility.
Illustration 3 g03695037
Sensor locations on the left side of the engine
(1) Coolant temperature sensor
(2) Solenoid for the high-pressure fuel pump
(3) Fuel rail pressure sensor
(4) Intake manifold air temperature sensor
(5) Intake manifold pressure sensor
(6) Barometric pressure sensor
(7) Electronic Control Module (ECM)
(8) Primary speed/timing sensor
(9) Oil pressure sensor
(10) Fuel temperature sensor
Illustration 4 g03695107
Close up views of sensor locations on the left side of the engine
(1) Coolant temperature sensor
(2) Solenoid for the high-pressure fuel pump
(3) Fuel rail pressure sensor
(4) Intake manifold air temperature sensor
(5) Intake manifold pressure sensor
(6) Barometric pressure sensor
(7) Electronic Control Module (ECM)
(8) Primary speed/timing sensor
(9) Oil pressure sensor
(10) Fuel temperature sensor
Illustration 5 g03695174
Sensor locations on the right side and top of the engine
(11) NRS inlet temperature sensor
(12) NRS valve including a position sensor
(13) NOx Reduction System (NRS) differential pressure sensor
(14) NRS inlet pressure sensor
(15) Wastegate regulator
(16) Exhaust Back Pressure Regulator (EBPR)
(17) Secondary speed/timing sensor
Illustration 6 g03695630
Sensors and components on the DOC/SCR aftertreatment
(18) DOC inlet temperature sensor
(19) SCR intake temperature sensor
(20) Diesel Oxidation Catalyst (DOC)
(21) Selective Catalytic Reduction (SCR) filter
(22) Aftertreatment ID module
(23) Diesel Exhaust Fluid (DEF) injector
Illustration 7 g03695759
Sensors and components on the DOC/DPF/SCR aftertreatment
(18) DEF injector
(19) DPF outlet NOx Sensor
(20) Aftertreatment ID module
(21) SCR intake temperature sensor
(22) DOC intake temperature sensor
(23) DPF intake temperature probe
(24) Soot sensor antennas
Illustration 8 g03695769
Components on the Pump and Electronics Unit (PEU)
(25) Diesel Exhaust Fluid (DEF) pump
(26) Dosing Control Unit (DCU)
(27) Pump and Electronics Unit (PEU) harness