Diagnostic Trouble Codes

The list below deals with the diagnostic trouble codes that are generated by the control units and can be transferred to the databus. In the diagnostic mode, they are displayed on the corner post.

A DTC service code (Diagnostic Trouble Code) consists of three elements:

  • CUI = Control Unit Identifier, refers to the control unit
  • SPN = Suspect Parameter Number; this number refers to the failure detected by the corresponding control unit.
  • FMI = Failure Mode Identifier; this number defines the type of fault.

Priority of Diagnostic Trouble Codes

Each Diagnostic Trouble Code (DTC) has a priority. The priority of the DTC is indicated in the way the DTC is displayed:

  • STOP = Priority 1 - The Cornerpost Display 1 will stop normal function and the DTC will be displayed. This indicates a problem that requires the forage harvester be stopped, the engine shut off immediately and the problem corrected. The Cornerpost Display 1 will show the DTC until the problem is solved.
  • WARNING = Priority 2 - The Cornerpost Display 1 Diagnostic Indicator comes on. This indicates a problem that should be checked immediately.
  • PROTECT = Priority 3 - DTC's will be stored, but it is not indicated.

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Control Unit Abbreviations

NOTE: Enter on-board diagnostic address RCP 103 (first digit) to select if diagnostic trouble codes are stored after the ignition key is cycled.

Display Meaning
Arc Armrest Control Unit
ECU Engine Control Unit
ocP Overhead Control Panel
rcP Corner Post Control Unit
rdc Rear Wheel Drive Control Unit
rGc Row Guidance Control Unit
SIG Metal Detector Control Unit
SPF SPFH Main Control Unit
JdL John Deere Link

 

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Prepare Forage Harvester:

Turn the key switch to the run position.

ZX002403

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Press the diagnostic switch. dIA will appear on the display.

ZX028664

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Press the up or down arrow switch to obtain the desired address (control unit identifier).

ZX028665

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Press the enter switch to 'select' the control unit. The display show the control unit identifier and the initial diagnostic address 000.

ZX028666

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Press the up arrow switch once. If diagnostic trouble codes are available the control unit identifier and CodE will appear on tachometer.

The bottom line indicates the number of active and stored codes:

  • The first two digits indicate the number of active codes.
  • The last two digits indicate the number of inactive stored codes.

If no diagnostic trouble codes are available the control unit identifier and nonE will appear on tachometer.

ZX1034358
ZX028672

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To read diagnostic trouble codes (if available) press the enter switch.

  • Record each control unit identifier
  • Record each suspected parameter number
  • Record each failure mode identifier
ZX028673

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Press the down switch.

The next diagnostic trouble code appears on the display.

Repeat this procedure until the display reads CLr?

ZX028674

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When "CLr?" appears on the display, press the enter switch.

Done appears on the display.

ZX028678

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