CASE AS-TRANSFER GEAR 6T2483 - Caterpillar

VIMSTM Electronic Control System utilizes various types of devices to provide input data to the VIMS Main and Application ECMs. The VIMS ECMs receive machine status information from the input devices. The ECM will use this information to determine the correct output action to control machine functions. This function is based on memory and software parameters. All of the components that supply inputs to the ECM are in one of the following groups:
Switch inputs
Sensor inputsSwitches provide signals to the switch inputs of the ECMs. The possible outputs of a switch are:
Open signal
Grounded signal
Voltage signalSensors provide an electrical signal to the ECMs that constantly change. Several different types of electrical signals can be provided to the ECM inputs from different types of sensors. The different types of sensor inputs are listed below:
Pulse width modulated (PWM) signals
Active analog (voltage) input signals
Passive analog (resistance) input signalsThe ECMs monitor many of the component circuits for diagnostics. If an ECM determines that an abnormal condition exists in one of the circuits, the ECM will log a diagnostic code for the involved component.