4-32
Copyright 2017 Cummins Inc.
TABLE 4-22. LOW FUEL WARNING (241)
WARNING
Many troubleshooting procedures present hazards that can result in severe personal inju-
ry or death. Only qualified service personnel with knowledge of fuels, electricity, and machinery haz-
ards should perform service procedures. Review Important Safety Instructions page.
DS13 on A34 is on, indicating that A34 is re-
ceiving a low fuel signal from the customer
circuit.
If there is no actual fault, the problem may
be a short to ground in the external wiring or
a bad customer interface board (A34)
.
Indicator(s) Possible Cause Corrective Action
DS13 on A34 is off, indicating that the PCC
is not receiving a low fuel signal from the
sender—but the 241 message indicates
that A32, the digital board, is responding to
a false low fuel signal.
A34, the customer interface board, or A32,
the digital board, could be bad.
If the fuel level is normal, isolate the source of the low
fuel signal.
*1. Install harness tool between A32 J2/P2.
2. Open the J2-19 circuit and reset the control.
If the fault drops out and does not return,
replace A34.
If the fault returns after resetting the con-
trol, replace A32.
“LOW FUEL”
warning
message (241)
Fuel level is
normal.
DS13 (A34) is
off.
“LOW FUEL”
warning
message (241)
Fuel level is
normal.
DS13 on the
customer
interface
board, A34, is
on.
If the fuel level is normal, isolate the source of the low
fuel signal.
Disconnect the signal lead near the control and reset
the control.
1. If the 241 message drops out and does not re-
appear, there is a short to ground in the external
wiring or a faulty sender.
*2. If the 241 message reappears and remains af-
ter control reset, disconnect J1/A34 and check
continuity from P1−5 to GND.
If there is continuity, find and repair a short
to ground in the external wiring.
If there is no continuity, replace circuit
board A34.
*CAUTION: Wearing a wrist strap, set S12 to Off and A32 S5 to Standby before connecting/disconnecting harness plugs.
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