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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. A large proportion of these codes appear before the operator automatically on his digital display.
In addition, functional faults are indicated on the dashboard by the red STOP light, the yellow CAUTION light and the blue INFO light.
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.
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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 called up and displayed in different ways depending on how the tractor is equipped. The following methods are possible:
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Display on the digital display
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Dual Gauge II
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Dual Gauge Plus II
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Display on the performance monitor
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