CYLINDER AS 2623670 - Caterpillar

Backup Alarm Function
The backup alarm function alerts surrounding personnel that the machine is backing up. The backup alarm is an output of the Power Train ECM. The Power Train ECM activates the backup alarm when the transmission direction control switch is in the REVERSE position. The backup alarm receives a +battery signal from the Power Train ECM when the backup alarm is activated.ReferenceFor information on the backup alarm, refer to Systems Operation, "Backup Alarm".ReferenceFor information on the Power Train Electronic Control Module (ECM), refer to Systems Operation, "Electronic Control Module (Power Train)".Ride Control Function
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(1) Ride control switch (2) Ride control indicatorRide 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 switch (1) has three positions, SERVICE position, OFF position and AUTO position.
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Ride control solenoids (3) and (4) are outputs of the Power Train ECM. The ride control solenoids activate and deactivate the ride control system. When the ride control is deactivated, both ride control solenoids are de-energized. When ride control is activated, both ride control solenoids are energized.Ride control is activated at all times when ride control switch (1) is moved and held in the SERVICE position. Power Train ECM continuously energizes ride control solenoids (3) and (4) . Ride control indicator (2) is on.Ride control is activated when ride control switch (1) is moved to the AUTO position and the machine ground speed increases above approximately 5 km/h (3 mph). The Power Train ECM energizes ride control solenoids (3) and (4) . Ride control indicator (2) is on.Ride control is deactivated when ride control switch (1) is in the AUTO position and the machine ground speed is below approximately 5 km/h (3 mph). The Power Train ECM de-energizes ride control solenoids (3) and (4) . Ride control indicator (2) is off. The default speed can be changed with the configuration screen of the Caterpillar Electronic Technician (ET).ReferenceFor information on the ride control solenoid valves, refer to Systems Operation, "Solenoid Valves".ReferenceFor information on the Power Train ECM, refer to Systems Operation, "Electronic Control Module (Power Train)".Diagnostic Operation
The Power Train ECM detects faults that occur in most of the input circuits and the output circuits. A fault is detected when the signal at the contact of the Power Train ECM is outside a valid range. The Power Train ECM then records the fault. If the fault goes away, the fault information remains stored as a logged fault for future reference.The diagnostics of the Power Train ECM are available to assist with the troubleshooting of detected faults. A service code is used to specify each fault. These service codes are shown in the display area of the Caterpillar Monitoring System. Service codes consist of three identifiers: MID, CID and FMI.Module Identifier (MID) - The MID is a three-digit code that is shown on the display area. The MID is shown for approximately