259D Compact Track Loader – Electrical Input Components

Switches

Key Start Switch

The switch is located in the left instrument cluster. Refer to figure 1.

The switch is a rotary key switch. The START position is a momentary position.

The switch tells the ECM that the operator wants to start the engine. When the switch is in the START position, the circuit is closed. This event applies a +battery voltage to pin J1-79 (wire 307-OR) of the ECM. If the seat switch and the armrest switch are actuated, the ECM will turn on the output for the start relay.

Parking Brake Switch

The switch is located on the left instrument cluster to the left of the key start switch. Refer to figure 1.

The switch tells the ECM that the operator wants to release the parking brake and the operator wants to enable the hydraulics

The switch is a momentary, rocker switch. When the switch is pressed, pin J2-62 (wire F780-PK) is grounded and pin J2-63 (wire A314-OR) is open.

While the parking brake is engaged, the hystat transmission will remain in NEUTRAL regardless of joystick position. If the machine is traveling while the parking brake is set, the machine controller will bring the machine to a stop and engage the parking brake. When the operator releases the parking brake, the hystat transmission will remain in NEUTRAL until the operator commands movement.

Arm Bar Switch

The switch is located on the left side of the armrest at the pivot point.

The switch tells the ECM the position of the armrest. The switch is a proximity switch with contacts that are normally open and normally closed. When the armrest is lowered, the normally closed contacts open and the normally open contacts close.

The normally open contacts are in series with the seat switch. The seat switch and the armrest switch create a circuit. When both the normally open contacts for the armrest and the seat switch are closed, pin J2-71 (wire G985-PU) of the ECM will be grounded. The armrest switch will also place an open input on pin J1-67 (wire G984-PK) of the ECM. When this event occurs, the operator is in the seat and the armrest is lowered.

Seat Switch

The switch is located within the operator seat. The connector for the switch is located beneath the seat.

The switch tells the ECM that the operator is in the seat. The switch is a momentary, normally open switch. When the seat is occupied, the switch is closed.

The seat switch is in series with the armrest switch. When both the normally open contact for the armrest and the seat switch are closed, pin J2-71 (wire G985-PU) of the ECM will be grounded. If the armrest is down, and the seat becomes unoccupied, the ECM will wait for 3 seconds before the operator is considered not present.

If the inputs are invalid, the operator will be considered not present, and the indicator will be illuminated.

Hydraulic Lockout Switch and Interlock Override Switch

The switch for the hydraulic lockout and interlock override is located on the left overhead control panel. The interlock override and the hydraulic lockout share the same switch on the machine.

Depress the top of the switch in order to activate the hydraulic lockout.

The switch tells the machine ECM that the operator wants to disable the hydraulic system.

When the switch is actuated, an open is placed on pin J1-50 (wire E918-GN) and a ground is placed on pin J1-51 (wire E917-WH) of the machine ECM. The hydraulic system will be disabled.

The machine ECM monitors the status of the switch.

Depress the bottom of the switch in order to activate the interlock override.

The switch tells the ECM that the operator wants to be able to raise the armrest in order to exit the seat while the continuous flow function is active to operate an attachment such as a backhoe.

Pressing the switch puts a ground on the pin J2-70 (wire G982-PK) of the ECM.

The machine ECM monitors the status of the switch. If the input is grounded for 30 seconds or more, the ECM will interpret the signal as a stuck switch and the ECM will produce a diagnostic code.

Hydraulic Lockout Switch (Door)

The switch is located near the center of the door by the wiper motor.

The switch tells the ECM to disable the hydraulics. However, it will not lock out the implements if the interlock override feature is enabled.

The switch is a two position limit switch. When the switch is not actuated, the normally closed contacts complete the circuit to the hydraulic lockout indicator. When the switch is actuated, the normally open contacts complete the circuit from the hydraulic lockout switch to pin J2-52 wire G943-BU of the ECM.

Multifunction Switch

The multifunction switch is located in the upper left-hand cab console on machines equipped with two speed travel motors.

This switch allows the operator to toggle the function of the trigger on the left-hand joystick between Two Speed and the Auxiliary Electrical Function "AUX 7". The switch is located on the left overhead control panel.

Two Speed

Auxiliary Electrical Function "AUX 7"

Two-Speed Switch

The switch is located on the front side of the LH Joystick. The two speed switch is a momentary trigger switch.

The switch tells the ECM that the operator wants to energize the two speed function. In order to activate rabbit mode, the Multifunction Switch must also be in the Two Speed position.

The switch is a momentary, normally open switch. When the switch is actuated, a ground is placed on J2-59 (wire P982-BU) of the ECM.

The ECM monitors the status of the switch.

Continuous Flow Switch

The continuous flow READY mode switch is mounted in the RH overhead console. When this momentary switch is pressed the alert indicator for continuous flow will flash indicating that continuous flow may be engaged by the auxiliary hydraulic control. This continuous flow READY mode will be disabled by either pressing the switch again or keying off the machine.

The continuous flow switch tells the machine ECM that the operator wants to supply a flow of hydraulic oil to the auxiliary circuit without the need to continuously hold the auxiliary hydraulic control.

In order to enable the system, use the primary auxiliary hydraulic input in order to achieve the desired hydraulic flow rate to the tool. When the tool is rotating at the desired speed, hold the thumbwheel in this position for 3 seconds. The flashing alert indicator for continuous flow will be lit continuously indicating continuous flow ON mode.

In order to disable the continuous flow feature, push either the auxiliary hydraulic control or push the continuous flow switch. Manual flow control to the auxiliary circuit is resumed.

The switch is a momentary, normally open push-button switch. When the switch is closed, the circuit puts a ground on pin J1-68 (wire P993-OR) of the ECM.

Auxiliary Hydraulic Control