What the Diagnostic Trouble Codes Mean

The tractor's electrical circuits are monitored by a number of different control units. If a functional fault occurs, a diagnostic trouble code will be generated and stored in the memory. Most of these codes are shown to the operator automatically on his digital display (on tractors with PowrQuad Plus transmission).

In addition, functional faults are indicated on the dashboard by the red STOP light, the yellow CAUTION light and the blue INFO light (on tractors with PowrQuad Plus transmission).

Unless the displayed message is self-explanatory (e.g. "transmission oil filter dirty"), you should get in touch with your John Deere dealer and discuss with him how best to proceed.

On the following pages you can read how to make all the diagnostic trouble codes appear on the display, even the ones that do not appear automatically. The meanings of the diagnostic trouble codes are arranged according to the control unit.

Diagnostic trouble codes are accessed and displayed in different ways depending on how the tractor is equipped. The following methods are possible:

• Display on the digital display
• Display on the performance monitor