John Deere 1894.31 – BCU or RPT: INFORMATION FOR OPERATOR: Rear PTO Switch was On When Engine was Started

This is an informational alert generated when the rear Power Take-Off (PTO) switch is in the "ON" position at the time the engine is started or the ignition is turned on. It is a safety feature designed to prevent the engine from starting under mechanical stress or causing unintended implement engagement. If the code appears when the switch is physically in the "OFF" position, it indicates a malfunction in the switch or its circuit.

• 6110M
• 6120M
• 6130M
• 6145M
• 6155M
• 6175M
• 6195M
• 6110R
• 6120R
• 6130R
• 6145R
• 6155R
• 6175R
• 6195R
• 6215R
• 5080R
• 5090R
• 5100R
• 6110M through 6195M
• 6110R through 6215R
• 6230
• 6330
• 6430
• 7430 Premium
• 7530 Premium

1. 1

   Verify Operator Action: Confirm whether the rear PTO switch was actually left engaged during startup.

2. 2

   Operational Check: If the switch was off, perform a functional check of the rear PTO switch. Ensure the button/switch does not stick and physically returns to the neutral/off position.

3. 3

   Visual Inspection: Inspect the PTO switch (both in-cab and fender-mounted, if equipped) for visible damage, dirt ingress, or disconnections.

4. 4

   Wiring and Connections: Inspect the wiring harness and connectors related to the rear PTO switch for signs of damage, corrosion, or loose pins that could cause a false 'ON' signal.

5. 5

   Software Check: Ensure the BCU/RPT control software is updated to the latest version, as patches sometimes address false switch signals.

1. 1

   Cycle the Power

   Turn off all PTO switches. Turn the ignition key off, wait a few seconds, and restart the engine. If the code clears and the PTO operates normally, it was likely an operator error.

2. 2

   Test the Switch

   If the code persists and the PTO will not function, use a multimeter to test the continuity of the rear PTO switch. Check if the switch is internally shorted (reading closed when it should be open).

3. 3

   Check Fender Switches

   If the tractor has external PTO control switches on the rear fenders, test these as well, as a stuck fender switch can trigger the same logic.

4. 4

   Replace Component

   If the switch fails the continuity test, remove the console panel or fender housing and replace the faulty PTO switch.

5. 5

   Repair Wiring

   If the switch tests good, trace the wiring back to the BCU/RPT module and repair any shorts to power.

6. 6

   Clear Codes

   Restart the tractor to verify the code is cleared and test PTO engagement.