38553-ZW9-W50 Honda BRACKET, CONNECTOR A (Honda Code 7550007).

Sensor Locations for the Engine
The illustrations in this section show the typical locations of the sensors for the industrial engine. Specific engines may appear different from the illustration due to differences in applications.Note: In the following illustrations, some components have been removed to improve visibility.Four Cylinder Engines
Illustration 1 g06439925
Typical sensor locations on the left side of the engine
(1) Secondary speed/timing sensor
(2) Coolant temperature sensor
(3) Electronic unit injector
(4) Intake throttle valve for the NOx Reduction System (NRS)
(5) Exhaust gas valve for the NOx Reduction System (NRS)
Illustration 2 g06439947
Close-up views of typical sensor locations on the left side of the engine
(1) Secondary speed/timing sensor
(2) Coolant temperature sensor
(3) Electronic unit injector
(4) Intake throttle valve for the NOx Reduction System (NRS)
(5) Exhaust gas valve for the NOx Reduction System (NRS)
Illustration 3 g06440342
Typical sensor locations on the right side and top of the engine
(6) Boost pressure sensor
(7) Air inlet temperature sensor (if equipped)
(8) Fuel pressure sensor
(9) Suction control valve for the fuel injection pump
(10) Fuel temperature sensor
(11) Oil pressure switch
(12) Primary speed/timing sensor
Illustration 4 g06440344
Close-up views of typical sensor locations on the right side and top of the engine
(6) Boost pressure sensor
(7) Air inlet temperature sensor (if equipped)
(8) Fuel pressure sensor
(9) Suction control valve for the fuel injection pump
(10) Fuel temperature sensor
(11) Oil pressure switch
(12) Primary speed/timing sensorThree Cylinder Engines
Illustration 5 g06440417
Typical sensor locations on the left side of the engine
(1) Secondary speed/timing sensor
(2) Coolant temperature sensor
(3) Electronic unit injector
(4) Intake throttle valve for the NOx Reduction System (NRS)
(5) Exhaust gas valve for the NOx Reduction System (NRS)
Illustration 6 g06440447
Typical sensor locations on the right side and top of the engine
(6) Boost pressure sensor
(7) Air inlet temperature sensor
(8) Fuel pressure sensor
(9) Suction control valve for the fuel injection pump
(10) Fuel temperature sensor
(11) Oil pressure switch
(12) Primary speed/timing sensorSensor Locations for the Clean Emissions Module
Illustration 7 g06439762
Sensors and components on a typical Clean Emissions Module (CEM)
(1) Delta pressure sensor
(2) DPF inlet temperature sensor probe
(3) DOC inlet temperature sensor probeECM
Illustration 8 g06163526
Typical example
The Electronic Control Module (ECM) (1) functions as a computer for the fuel system.The electronic system consists of the ECM, the engine sensors, and inputs from the application. The ECM is the computer. The flash file is the software for the computer. The flash file contains the operating maps. The operating maps define the following characteristics of the engine:
Engine rating
Torque curves
High and low idle speed (rpm)
EmissionsThe ECM has an excellent record of reliability. Any problems in the system are most likely to be the connectors and the wiring harness. The ECM should be the last item in troubleshooting the engine.The programmable software contains all the fuel setting information. The information determines the engine performance.Flash programming is the method of programming or updating the programmable software. Refer to Troubleshooting, "Flash Programming" for the instructions on the flash programming of the programmable software.The ECM is sealed and the ECM needs no routine adjustment or maintenance.Engine Speed
The ECM has software that compares the desired engine speed to the actual engine speed. The actual engine speed is determined through the crankshaft speed sensor. If the desired engine speed is greater than the actual engine speed, the ECM will instruct the fuel injection pump to supply more fuel to the fuel injectors to increase engine speed.Fuel Injection
The programmable software inside the ECM sets certain limits on the amount of fuel that can be provided to the fuel injectors.The ECM controls the following characte