John Deere 600006.13 – ATC: Diagnostic Trouble Code Not Known

This is a general placeholder code generated when the ATC (Automatic Temperature Control) unit receives a diagnostic trouble code via the CAN BUS that is not stored in its current memory or software version. It can also occur when the module encounters an internal fault state that is not mapped to a specific known DTC. The system recognizes an error is present, but the specific software version cannot identify or translate the exact fault.

• 6230
• 6330
• 6430
• 7130
• 7230
• 7330
• 7430
• 7530
• 8R Series
• 9R Series

1. 1

   Perform a full system scan using John Deere Service ADVISOR (or compatible scanner) to pull codes from all modules (BCU, ECU, TEC, etc.), as the ATC is likely reacting to a fault originating elsewhere on the CAN BUS.

2. 2

   Verify the current software payload on the ATC module. Outdated software is the most common reason a module cannot recognize a newer DTC broadcasted on the network.

3. 3

   Inspect the wiring harness and CAN BUS communication lines connecting the ATC to the main CommandCenter/DTI for shorts or poor pin tension.

4. 4

   Test the physical climate control functions (blower motor speeds, temperature blend door actuation, A/C compressor engagement) to see if a hard failure is present despite the vague code.

1. 1

   Address known codes first

   If the full system scan reveals other active DTCs in the BCU (Basic Control Unit) or ECU (Engine Control Unit), diagnose and repair those first. Clearing the root network faults often clears the 600006.13 code in the ATC.

2. 2

   Update module software

   If no other codes are present, use Service ADVISOR to reflash and update the ATC control unit to the latest software version. This will often update the module's code library, resolving the glitch or translating the 600006.13 code into a specific, actionable HVAC fault code.

3. 3

   Inspect relays and actuators

   If the HVAC system is physically malfunctioning (e.g., blowing warm air when it should be cold), inspect the ATC relay and the temperature control actuators for burnout or binding.

4. 4

   Replace the ATC unit

   If the software is up to date, the CAN BUS wiring is intact, and the climate control system is completely unresponsive, the ATC control unit or display module has suffered an internal failure and must be replaced.