Centry™ Fuel System Diagnostics; General Operation; Determining Fault Codes - Komatsu 730E Operation & Maintenance Manual

OM3214
Operator Cab and Controls
CENTRY™ FUEL SYSTEM
DIAGNOSTICS

GENERAL OPERATION

Service engine indicator light (D6, Figure 32-12)
monitors the Centry™ fuel system.
When the key switch is turned on, this light will illumi-
nate for about two seconds and then turn off, if no
faults are detected in the system. If the light stays on
or flashes, then active faults have been detected by
the system. DO NOT start the engine if the indicator
remains lit.

DETERMINING FAULT CODES

During engine operation, if a fault is detected in the
system, the light will turn on and stay on indicating a
warning fault. For more severe faults that can affect
engine operation, the light will flash indicating that
immediate attention is required..
Warning faults (light on) are ones that require atten-
tion in the near future, but in most conditions, will not
greatly affect governing performance.
Severe faults (light flashing) are ones that require
immediate attention, because Centry™ governor
performance could be significantly affected, resulting
in a backup mode of operation.
Active fault conditions must be corrected as soon as
possible.
Lamp test/diagnostic test switch (8, Figure 32-12)
may be used to activate the Centry™ fuel system
diagnostic codes. When the Centry™ fuel system
detects a fault and service engine indicator light (D6,
Figure 32-12) illuminates, this switch will permit iden-
tification of the fault(s) detected.
Centry™ fault codes consist of three numerical digits.
Each digit is indicated with up to five light flashes
(service engine indicator light) per each digit. There
is a short pause between each digit of the fault code.
Once all three digits are flashed, there is a longer
pause, followed by a repeat of the same fault code
sequence.
1. To determine an active Centry™ fault, turn the
key switch to the OFF position. Ensure the
engine completely stops, if it was on.
2. Turn the key switch to the ON position (engine
not on), and press the lamp test switch to the
bottom (√) position for one to two seconds, then
release. The switch is spring-loaded and will
return to the OFF position.
NOTE: Since this is the lamp test switch, all red
warning lights and amber indicator lights will light
except those that are blank. The warning horn will
also sound.
Operation - Section 32
Page 32-21