HARNESS AS 8E8755 - Caterpillar

Ride Control Function (If Equipped)
Illustration 12 g00473492
Ride Control SwitchRide control is an optional function that is enabled by a programmable parameter via the Caterpillar Electronic Technician (ET). Ride control can also be enabled by the calibration mode of the Caterpillar Monitoring System. Ride control is enabled when the operator places the ride control switch in the ON position or the AUTO position. In the ON position, ride control is activated at all times and the power train ECM continuously energizes the ride control solenoid. In the AUTO position, ride control is activated and ride control is deactivated. Ride control is activated when the machine ground speed increases above approximately 6 mph. Ride control is deactivated when the machine ground speed is below approximately 5.5 mph. When the ride control switch is in the AUTO position, the default speed is set to 6 mph. The default speed can be changed with the configuration screen of the Caterpillar Electronic Technician (ET). As ride control is activated and deactivated the ride control solenoid is energized and de-energized.Ride control is available in two versions, standard and improved. The standard version of ride control uses one ride control solenoid. The improved version of ride control uses two ride control solenoids.The ride control solenoid for standard ride control is an output of the power train ECM. The ride control solenoid turns the ride control system on and off. When ride control is enabled, the ride control solenoid is energized. When ride control is disabled, the ride control solenoid is de-energized. The ride control solenoid has a connector with two contacts. One contact receives power from the connector contact J1-18 of the power train ECM. The other contact returns power to the connector contact J2-3 of the power train ECM.The two ride control solenoids for improved ride control are outputs of the power train ECM. The ride control solenoids turn the ride control system on and off. When ride control is disabled, the number one ride control solenoid is de-energized and the number two ride control solenoid is energized. When ride control is enabled, the number one ride control solenoid is energized 5 seconds after the number two ride control solenoid is de-energized. The delay time can be changed with the ride control equalization pressure time parameter of the Caterpillar Electronic Technician (ET). Both of the ride control solenoids have a connector with two contacts. The number one ride control solenoid receives power from the connector contact J1-18 of the power train ECM. The number two ride control solenoid receives power from the connector contact J1-12 of the power train ECM. Both of the ride control solenoids return power to connector contact J2-3 of the power train ECM.Reference: For more information on the Caterpillar Monitoring System, refer to the Service Manual module Systems Operation, "Caterpillar Monitoring System" for the machine that is being serviced.Reference: For more information on the power train electronic control module (ECM), refer to the Service Manual module Systems Operation, "Electronic Control Module