BUSHING 2520023 - Caterpillar

Which Generate This Code:This diagnostic code is recorded if the ECM is unable to communicate with the engine speed dial switch.Note: The Speed Dial Switch is integrated into the switch panel located to the right of the operator in the cab of the machine. The switch sends a PWM signal to the Machine ECM via the Local CAN data link. When the Machine ECM receives a signal to request a change in engine speed, the Machine ECM will communicate the request to the Engine ECM.The possible causes of this diagnostic code are listed:
The switch has failed.
The communication data link machine harness has failed.
The ECM has failed. This situation is unlikely.Test Step 1. INSPECT THE HARNESS CONNECTIONS.
Turn the disconnect switch to the OFF position.
Inspect the harness connections of the switch panel. Make sure that the connectors are clean and tight.
Check the mating of the harness connectors.
Check wires at the connector.
Check each wire for nicks or signs of abrasion in the insulation.
Check for moisture at the connector.
Check for dirty contacts or corroded contacts.
Check each pin and each socket. Expected Result:The machine harness connectors are tight and free of corrosion. Results:
OK - The machine harness connectors are tight and free of corrosion. Proceed to Test Step 2.
NOT OK - The machine harness connectors are NOT tight and free of corrosion. Repair: Repair the machine harness or replace the machine harness.STOPTest Step 2. CHECK FOR A SHORT TO GROUND
The disconnect switch and the key start switch remain in the OFF position.
The ECM and the engine speed dial switch remain disconnected from the machine harness.
At the machine harness connector for the Switch Panel, measure the resistance between frame ground and each of the Local CAN connector contacts listed below:
K960-YL (located at pin C13-1 on the switch panel connector).
K961-GN (located at pin C13-2 on the switch panel connector).Expected Result:The resistance is greater than 5000 ohms. Results:
OK - The resistance is greater than 5000 ohms. The resistance of the circuits is correct. Proceed to Test Step 3.
NOT OK - The resistance is less than 5000 ohms. The resistance of the circuit is not correct.Repair: There is a short between frame ground and the "circuits that have less than 5000 ohms of resistance" in the machine harness. Replace the machine harness or repair the machine harness.STOPTest Step 3. CHECK IF THE DIAGNOSTIC CODE REMAINS
Inspect the contacts of the harness connectors and clean the contacts.
Reconnect all harness connectors.
Turn the disconnect switch (if equipped) and the key start switch to the ON position.
Operate the machine.
Check the display for an active diagnostic code of CID 0586 FMI 12.Expected Result:The diagnostic code of CID 0586 FMI 12 is not active.Results:
OK - The diagnostic code of CID 0586 FMI 12 is not active. The failure is no longer present.Repair: The diagnostic code was probably caused by a poor electrical connection or a short at one of the harness connections that was disconnected and reconnected. Resume normal machine operation.STOP
NOT OK - The diagnostic code of CID 0586 FMI 12 is active. The