John Deere 524216.02 – PTF (Front PTO System / Front Chassis Module) or BCU (Basic Control Unit): Issue With Message On The CAN BUS From The Main Control Module Relating To The Front PTO Switch Signal

Issue description

Front PTO Switch Circuit Fault or an issue with the Front PTO Switch Voltage. The diagnostic trouble code is generated when the messages from the control software (OIC/AIC) regarding the front PTO switch value are not plausible or are interrupted.

Applies to these machines

6110M
6120M
6130M
6145M
6155M
6175M
6195M
6110R
6120R
6130R
6145R
6155R
6175R
6195R
6215R
8235R
8260R
8285R
8310R
8335R
8360R
8245R
8400R
6230
6330
6430
7630
7730
7830
7930
7720
7820
7920
7715
7815
5080R
5090R
5100R
5080RN
5090RN
5100RN
6090MC
6100MC
6110MC
6090RC
6100RC
6110RC
6250R

Check the cause

Restart the tractor engine to verify if the active Diagnostic Trouble Code reappears, as this can sometimes reset communication messages.
Acknowledge the Service Alert and clear the display by pressing the select switch on the CommandCenter.
Perform a circuit/harness test on the Front PTO Switch (test S06) to rule out damaged wiring or a loose connector before replacing the switch.

Repair steps

Disconnect battery
Disconnect the battery ground to prevent electrical shorts.
Access switch
Access the Front PTO switch. Depending on the tractor configuration, this requires disassembling the armrest (by removing the bolts at the bottom) or removing the shift console trim ring and console covers.
Remove switch hardware
Remove the knob cap and snap ring securing the switch.
Disconnect harness
Disconnect the 3-pole compact plug/cable harness from the faulty switch.
Install new switch
Install the new Front PTO switch and reconnect the cable harness.
Reassemble components
Reassemble the armrest or console covers.
Test system
Reconnect the battery, start the tractor, and test the Front PTO engagement to ensure the code is cleared.

Parts you might need

(3)

Front PTO Switch Control
AL218838
Fits modern 6R series tractors such as 6110R through 6250R
AL218838

Front PTO Switch
ER425933
General replacement part
ER425933

Front PTO Switch
AM39489
Fits older/compact models like the 318, 420, and 430, and is likely not applicable to the newer CAN BUS systems throwing this specific code
AM39489

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