Service and Repair Manual
April 2018
Diagnostic Display
52
GTH-636
Part No. 1287209GT
When the engine Electronic Control Module (ECM)
detects an abnormal operating condition, a fault
code is immediately stored in the ECM memory.
The fault code is displayed on the LCD display
which is located on the gauge cluster in the
operator's compartment.
The gauge cluster also includes two warning lights.
They are an amber colored light which signals an
abnormal engine condition which should be
corrected as soon as possible and a red colored
light which signals an engine condition which
requires the operator to shut down the engine as
soon as possible.
The ECM will, in some cases, automatically shut
down the engine when the red light is displayed.
Active Fault Codes
Active Fault Codes will be displayed on the gauge
cluster when the diagnostic button is pressed for 5
seconds, if present. If multiple fault codes are
detected, scroll through them using the diagnostic
button.
Active Codes vs Stored Codes
Active fault codes, indicating an engine condition or
conditions which have not been corrected, are
displayed at the moment the fault is detected.
Stored fault codes are the cumulative history of
fault codes which the ECM has detected. These
fault codes may be recalled by service personnel at
a later time even if the condition which caused the
engine fault has ceased to exist.
Note: Additional hardware will be necessary to
access stored codes.
Decoding Fault Codes
The Suspect Parameter Number (SPN) and the
Failure Mode Identifier (FMI), when combined, are
the basis for an engine fault code. The SPN
number indicates the affected component; the FMI
number reveals the type of failure that has
occurred. Comparing the combination of numbers
to the fault code chart on the following pages will
help to determine the exact engine fault and a
corrective course of action. For additional
information, refer to the engine operator's manual
which came with your machine.
1 Diagnostic button
2 LCD screen
Содержание GTH-636
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