CONTROL GP-JOYSTICK 3898782 - Caterpillar

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(1) Brake ECM (2) Engine Speed Sensor (3) Engine Cooling Fan Speed Sensor (4) Brake Cooling Pump Speed Sensor (5) Right and Left Front Brake Temperature Sensor (6) Rear Differential Temperature Sensor (7) Cab Air Temperature Sensor (8) Right and Left Rear Brake Temperature Sensor (9) Cab Ventilation Duct Temperature Sensor (10) Keyswitch (11) Left and Right Front Wheel Speed Sensor (12) Left and Right Rear Wheel Speed Sensor (13) Operator TCS Test Switch (14) AC Low Pressure Switch (15) Service Brake Pressure Switch (16) Retarding Machine Speed Set +/- (17) Differential Lube Pressure Sensor (18) Brake Pump Pressure Sensor (19) Service Brake Accumulator Pressure Sensor (20) Cab Air Heater Engine Coolant Actuator (21) Left and Right Secondary Brake Pressure Sensors (22) Secondary Brake Accumulator Pressure Sensor (23) Retarder Lever (Position Sensor) (24) Service Brake Pedal Position Sensor (25) Brake Light Relay (26) Powered Access Stairway Disable Relay (27) A/C Compressor Clutch Relay (28) Final Drive Oil Bypass Solenoid (29) Front ARC Control Solenoid (30) RAXL Cooler Fan Solenoid (31) Park Brake Solenoid (32) Rear ARC Control Solenoid (33) Brake Unloader Solenoid (34) Rear Axle Pump Drive Divert Solenoid (35) Brake Cooling Pump Drive Solenoid (36) Engine Cooling Fan Solenoid (37) TCS Right and Left Brake Solenoids (38) TCS Proportional Solenoid (39) ABS Inertial Measurement Unit (IMU) (40) Front and Rear Service Brake Pressure Sensors (41) Operator ARC Switch (42) Cab Air Temperature Control Switch (43) Cab Air Temperature Dial (44) Brake Filter Switch (45) Brake Cooling Filter Switch (46) Differential Filter Bypass Switch (47) Secondary Brake Pedal Position Sensor
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Location of Brake ECM (near front of cab)The Brake ECM controls the various functions for the machine include: service braking, secondary braking, manual retarding, the Automatic Retarder Control (ARC), the Traction Control System (TCS), HVAC and machine hydraulic fluid monitoring functions. The Brake ECM also performs monitoring of the system and diagnostic warnings of the wheel speed and the HVAC system through the graphical display module.Service braking and secondary braking are performed via pedals that are located on the floor of the cab. Manual retarding is performed via a lever located on the steering column.The ECM determines whether the service brakes should engage for the function of the ARC. This action is accomplished by sending signals to the various components of the ARC. For effective use of the ARC, the operator must engage the proper transmission gear before descending a grade with the truck. The ARC system is used to apply braking to maintain the speed of the truck at a calculated speed or a set control speed. If any speed limit is active on the machine (Brake Machine Speed Limit, Tonne Kilometer Per Hour, Machine Speed Limit, or Overload Machine Speed Limit), the "ARC" system will apply the service brakes to maintain the calculated or set speed limit.The operator has the option of manually disabling the "ARC" system via a rocker switch that is located on the dash panel. Disabling the "ARC" system will allow the