SERVICE GP-YOKE AS 9C6347 - Caterpillar

electronic control module (ECM) for the engine controls the operation of the engine. The electronic unit injection (EUI) engines utilize a common engine interface (CEI). In CEI applications, the EMCP 3 only sends the engine start and the engine stop information across the datalink.Note: For a CEI application, the cool down timer that is in the ECMP 3, must be set to zero.The engine ECM controls engine speed and also enables fuel injection on EUI engines in electric power generation applications. The fuel enable input and the speed input can be configured using the service tool.The fuel enable input to the ECM can be wired as a "switch-to-ground" or be transmitted over the primary J1939 data link. If the input is transmitted over the J1939 data link, the input is from the EMCP 3.The desired engine speed is derived from one of the following two inputs:
A converter or directly from the EMCP 3 over the primary J1939 data link. The converter changes the analog speed signal, of a speed potentiometer, into a pulse width modulated signal.
Feedback from the engine speed sensors that are mounted on the engine. The ECM uses the feedback to control the engine speed.There are primary and secondary throttle inputs. The throttle inputs can be a pulse width modulated signal or the speed inputs can be transmitted over the primary J1939 link (CAN 1). Note: The Cat service tool is used in order to configure the throttle inputs as either primary or as secondary.If the primary throttle input fails, then the engine ECM will generate a diagnostic, acknowledge the failure, and respond to the secondary input. If the primary throttle input fails and the secondary input is disabled, then the engine will default to the idle speed setting.The EMCP 3 receives specific information that is used to monitor the system for events. If a particular parameter is not supported by the engine ECM, then the EMCP 3.3 displays the parameter name with an associated value of "****". The "****" indicates that there is no value associated with that specific parameter.Note: Recent versions of software do not display the parameter name for unsupported parameters.The following information is shown on the display screen of the EMCP 3.3:
Engine oil pressure (see note 1 that is shown below)
Engine coolant temperature (see note 2 that is shown below)
Left exhaust manifold temperature
Right exhaust manifold temperature
Intake manifold temperature
Oil temperature
Fuel pressure
Boost pressure
Oil filter differential pressure
Fuel filter differential pressure
Air filter differential pressure
Fuel consumption
Battery voltage
Engine speed (rpm)
Engine hours
Engine state
Service (hrs)/days
Reset service interval command
Total crank (Cranks)
Total start (starts)
Reset counters
Exhaust temp
Turbo 1, 2, 3, and 4 compressor inlet temp
Turbine 1, 2, 3, and 4 inlet temp
Turbine 1, 2, 3, and 4 outlet temp
Cylinder temps
Crankcase pressure
Total fuel
Rate of fuelNote: 1) Only the values for engine screens 6 through 11 will be displayed if the screens are supported by other modules or on one of the J1939 data links.Note: 2) Engine information displayed on the EMCP 3.1 and EMCP 3.2 includes only "Engine Oil Pressure" and "Engine Coolant Temperature".The