John Deere 876 – E03: Climatrak Compressor Driver Fault

The E03 Left Control Unit has detected a fault within the Climatrak air conditioning system's compressor driver circuit. The underlying condition is an open circuit, short circuit, over-voltage, or over-temperature condition within the driver. This is classified as a Priority 2 or 3 issue, meaning it should be checked promptly but may not require an immediate machine shutdown.

• 9540 WTS
• 9560 WTS
• 9580 WTS
• 9640 WTS
• 9660 WTS
• 9680 WTS
• 9650 STS
• 9750 STS
• 9560 STS
• 9660 STS
• 9760 STS
• 9670 STS
• 9770 STS
• 9470 STS
• 9570 STS
• S560
• S690
• T-series Combines
• W-series Combines

1. 1

   Verify the vehicle's electrical system voltage is within the normal range, as an over-voltage condition can trigger this fault

2. 2

   Visually inspect the wiring harness and connectors associated with the air conditioning compressor and the Left Control Unit (E03) for any signs of damage, corrosion, or loose connections

3. 3

   Use a multimeter to test for continuity and resistance in the compressor clutch circuit, checking for open circuits or shorts to power or ground

4. 4

   If the controller cannot exit its boot block program, disconnect the Left Control Unit connector (X213) and then reconnect it

1. 1

   Perform circuit diagnostics

   Complete all visual inspections and multimeter tests on the compressor clutch circuit to rule out external wiring or connector faults.

2. 2

   Replace Left Control Unit

   If no issues are found with the external wiring or connectors and the fault code remains active, replace the Left Control Unit. The Climatrak Compressor Driver is an integrated circuit within the unit and cannot be replaced separately.

3. 3

   Program replacement controller

   Have a John Deere dealer program the replacement control unit to ensure it functions correctly with the specific machine.