FILM-WARNING 2253227 - Caterpillar

The brake/fan oil filter bypass switch is a pressure switch that shows whether the filter is plugged and the filter is being bypassed. The brake/fan filter bypass switch is a normally closed switch. The bypass switch will close at 500 kPa (73 psi) differential pressure notifying the ECM that the filter is plugged. The hydraulic filter bypass switch provides a ground to the ECM when activated.This switch is one of the inputs that is used in order to drive the "system indicator" in the instrument cluster. This indicator is turned ON when the switch is in the closed position and the oil temperature is greater than 52° C (126° F) with the engine running.Seat Belt Switch
An input to the implement ECM that indicates if the seat belt is fastened.Armrest Position Switch
An input to the implement ECM that indicates if the left armrest is in the stowed position.Operator Present Switch
An input to the implement ECM that indicates if the operator is present.Heated Mirror Switch
An input to the implement ECM to activate the heated mirror.Autodig Trigger Switch
Sends an input signal to the implement ECM when the operator has pressed the switch to indicate that the loading cycle should begin.PCS Clear/Store Switch
Sends an input signal to the implement ECM when the operator has pressed the switch to clear or store the current payload reading.Outputs
Illustration 12 g03565441The ECMs respond to decisions by sending electrical signals to the outputs. The outputs can create an action or the outputs can provide information to the operator or the service technician. The outputs of the ECM are listed in Table 1 and Table 2.Solenoids
Illustration 13 g03371644Hydraulic Lockout Valve
This ON/OFF solenoid valve is an output from the implement ECM. This valve opens the flow of pilot oil to the pilot valves.Raise Solenoid Valve
This proportional solenoid valve is an output from the implement ECM. This solenoid valve sends a proportional amount of pilot oil to the raise end of the lift stem, depending on the amount of current applied to the solenoid.Tilt Back Solenoid Valve
This proportional solenoid valve is an output from the implement ECM. This solenoid valve sends a proportional amount of pilot oil to the tilt back end of the tilt stem, depending on the amount of current applied to the solenoid.Dump Solenoid Valve
This proportional solenoid valve is an output from the implement ECM. This solenoid valve sends a proportional amount of pilot oil to the dump end of the tilt stem, depending on the amount of current applied to the solenoid.Lower Solenoid Valve
This proportional solenoid valve is an output from the implement ECM. This solenoid valve sends a proportional amount of pilot oil to the lower end of the lift stem, depending on the amount of current applied to the solenoid.Ride Control Activation Solenoid and Ride Control Balance Solenoid
When ride control is not activated, the balance solenoid disconnects the accumulator from the balance spool. This disconnection creates a path from the change spool to the accumulator and allows the accumulator to charge.When ride control is activated, the