John Deere 523966.31 – TIA / PTQ / ACU / EPC / TIP / TIQ / CAB: Transmission Come Home Active / Limp Home Mode Activated

This code is generated when the tractor's 'Come Home' mode is activated. This happens when the dedicated 'Come Home' fuse is installed in the fuse panel (often the F5 slot) or when the come-home function plug is moved to the 'COME HOME' position. 'Come Home' mode is a manual override or protective measure that allows the vehicle to operate at severely reduced functionality (e.g., engine speed limited to 1500 RPM, only first gear available) so the operator can safely drive the machine to a service location.

• 6110R
• 6120R
• 6130R
• 6145R
• 6155R
• 6175R
• 6195R
• 6215R
• 6110M
• 6120M
• 6130M
• 6145M
• 6155M
• 6175M
• 6195M
• 7630
• 7720
• 7730
• 7820
• 7830
• 7920
• 7930
• 8130
• 8230
• 8330
• 8430
• 8530
• 5065M
• 5075M

1. 1

   Check the Reverse Drive Lever to ensure it operates smoothly and correctly engages in the Neutral or Park position.

2. 2

   Inspect the Fuse Panel (Load Center) at the specific slot designated for the 'Come Home' fuse (often F5, F32, or F34).

3. 3

   Verify that the 'Come Home' fuse is NOT installed, as it is only meant for emergency recovery.

4. 4

   Check the physical connector/plug for the come-home feature to ensure it hasn't been accidentally switched to the 'COME HOME' position.

1. 1

   Shift to Neutral/Park

   Move the reverse drive lever to the Neutral or Park position.

2. 2

   Access the Load Center

   Locate the fuse panel (often found directly behind the operator's seat, just below the cab rear window).

3. 3

   Remove the Fuse

   Locate the 'Come Home' fuse (e.g., F5 slot) and remove it. If your model uses a plug instead of a fuse, return the plug to its normal operating position.

4. 4

   Test the Tractor

   With the fuse removed, restart the engine and operate the vehicle for 5 minutes.

5. 5

   Clear Codes / Dealer Intervention

   If the tractor resumes normal operation, the issue is resolved. If the 523966.31 code returns immediately, or if the tractor forces itself into Limp Home Mode without the fuse installed, there is a deeper transmission fault, sensor malfunction, or wiring short. At this stage, John Deere dealer diagnostic software (Service ADVISOR) is required to pull the underlying transmission fault codes that are triggering the Limp Home override.