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JT40/JT40 All Terrain Operator’s Manual
Systems and Equipment - 191
Diagnostic Codes
Diagnostic Codes
The JT40 / JT40 All Terrain is equipped with two diagnostic systems: engine and machine. The engine
diagnostic system detects critical and non-critical errors within the engine operating system and
communicates fault codes on the upper display. The machine diagnostic system detects errors within the
automated machine control system. These error codes are also displayed on the upper display.
To hide/recall active codes:
Press the soft key on the upper display for the diagnostic message center.
Then press the soft key to hide/recall messages.
Electronic Controlled Engine Overview
This unit is equipped with a self-diagnostic computer-controlled engine management system. An ECU
(Electronic Control Unit) monitors engine performance and makes adjustments to optimize that
performance.
Indicators, plus diagnostic codes and messages, on the upper display tell the operator about potential
engine problems and certain engine events. Depending on the severity of the problem, the ECU may
reduce engine power or speed or may shut the engine down. The ECU also stores all diagnostic codes
regardless of severity.
Reading Engine Diagnostic Codes
Engine diagnostic codes are shown in pop-up messages on the upper display. Amber or yellow messages
indicate problems that should be addressed but do not need immediate attention. Red messages indicate
problems that need immediate attention. Failure to address a problem indicated by a red message will
generally result in the engine derating or shutting down.
Machine Diagnostic System Overview
Use the upper display to view condition of the machine automation diagnostic system. Under normal
operating conditions, any diagnostic code that is recorded will be shown as a pop-up message on the
upper display.
Diagnostic Codes
Note the SPN, FMI, and description of the diagnostic code for future reference, if needed. See “Appendix”
on page 253.
IMPORTANT:
Do not turn off ignition. Diagnostic codes are cleared each time ignition is turned off.
Summary of Contents for JT40
Page 1: ...JT40 JT40 All Terrain HRC and LRC Issue 1 0 Original Instruction Operator s Manual 053 2966 ...
Page 79: ...Controls 78 JT40 JT40 All Terrain Operator s Manual Battery Disconnect ...
Page 113: ...Drive 112 JT40 JT40 All Terrain Operator s Manual Shut Down Unit ...
Page 119: ...Transport 118 JT40 JT40 All Terrain Operator s Manual Retrieve ...
Page 147: ...Conduct a Bore 146 JT40 JT40 All Terrain Operator s Manual Remove Pullback Device ...
Page 199: ...Complete the Job 198 JT40 JT40 All Terrain Operator s Manual Stow Tools ...
Page 241: ...Service 240 JT40 JT40 All Terrain Operator s Manual As Needed ...
Page 250: ......
Page 251: ......
Page 253: ...Service Record 252 JT40 JT40 All Terrain Operator s Manual Service Performed Date Hours ...