CONTROL GP-JOYSTICK 3898783 - Caterpillar

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View of "Advisor" screen that confirms that the retarding speed has been set
The "Advisor" screen will display a popup message for 3 seconds after a retarding speed has been successfully set for the machine. The popup screen on the Advisor will display a value as well as units. Note: The retarding speed of the machine can only be set when the throttle pedal is NOT DEPRESSED.After a valid retarding speed has been set for the machine, the operator can toggle the "SET/ACCEL/DECEL" rocker switch in order to raise or in order to lower the retarding speed of the machine. The Advisor will contain a popup display if the operator is incrementing or decrementing the speed of the machine.Note: The retarding speed of the machine CAN ONLY be adjusted to a speed that corresponds to the maximum retard speed of the engine (typically high idle) and an engine speed that is ABOVE the corresponding downshift breaking points for that gear."Operator Traction Control System Test" Switch
The "Traction Control System" monitors the ratio of the speed of each rear wheel in order to detect a slippage in one of the wheels. When a slippage is detected for one of the rear wheels, the secondary brakes will be applied to that wheel in order to apply torque to the wheel with better traction.Test Mode (Manual)
The Traction Control System has a dynamic test mode that allows the operator to initiate a test of the Traction Control System while the machine is in motion.The operator initiates the test by pressing the momentary switch that is located on the dash of the truck. With the TCS test switch is depressed, the TCS system will reduce the cut-in spin ratio to 1.3. Engaging the switch will allow the Traction Control System to engage as the operator performs slight turns of the truck to the left or the right.Test Mode (Semi-Automatic)
The TCS has a semi-automatic test function that allows the operator to monitor TCS solenoid currents as the solenoids are cycled back and forth.The following conditions must be met before starting this test:
The truck is stationary (ground speed = 0).
The service brakes must be applied.
The parking brake must be released.
The TCS test switch must be depressed.The TCS will oscillate the current of each TCS solenoid (right and left) one at a time. The left solenoid is the first one to be engaged as the current is ramped up to the full current and down to no current. The process will then be repeated for the right solenoid and the process will continue to repeat until the TCS test switch is released.Internal Switches
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Diagram of typical internal switch
The following switches are direct inputs to the Brake ECM. The switches are located within the subsystems of the truck. In order to locate these switches, refer to the System Schematic for the truck.
Brake Filter Switch
Brake Cool Filter Switch
Service Brake Pressure SwitchDifferential Filter Bypass Switch
A level 1 event is logged when the filter bypass is detected and the hydraulic oil