4-23
Copyright 2017 Cummins Inc.
TABLE 4-13. LOW OIL PRESSURE WARNING (200) OR SHUTDOWN (201)
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.
Indicator(s) Possible Cause Corrective Action
“LOW OIL
PRESSURE”
warning
(200) or
shutdown
(201)
message.
1. Low oil level. Clogged lines or filters.
2a. Sender or oil pump could be bad. Or
the generator set may be shutting
down on another fault.
1. Check oil level, lines and filters. If oil system is
OK but oil level is low, replenish. Oil pressure
limits are listed in Table 4-3.
2. Disconnect the oil pressure sender leads, and
connect an oil pressure sender simulator to the
harness.
a. If the control responds to the simulator, recon-
nect the sender, disconnect the run signal wire
at the fuel solenoid, and crank the engine.
Check the oil pressure reading on the digital
display.
If the display shows an acceptable oil pres-
sure, the problem may not be in the oil or oil
sensing system. The generator set may
be shutting down on another fault (out of
fuel, blown governor fuse, intermittent
connector). Restart the generator set and
monitor the PCC display panel for other
faults.
If the display does not show an acceptable
oil pressure, replace the sender. If the
PCC still doesn’t display an oil pressure
while cranking, the oil pump may be faulty.
Refer to the engine service manual.
*b. If the control does not respond to the simulator,
the PCC or the harness is bad. Install harness
tool between A31 J2/P2.
Check for +5 VDC at the sender (lead marked
E1-B). If there is no 5 VDC at the sender
Check for 5 VDC at A31 J5-18.
If yes, harness is bad. If no, check for 5
VDC at A31 J2-24.
If yes, A31 is bad. If no, A33 is bad.
If there is 5 VDC at the sender, use the sender
simulator to generate a signal to A31 J2-23. If
the pressure signal (0.5 to 4.5 VDC) does not
get to A31 J2-23, isolate to the harness or A31.
If the pressure signal does get to A31 J2-23, re-
fer to the analog/digital troubleshooting proce-
dure (Table 4-30a/b).
2b. Harness or PCC circuit board could be
bad.
Isolate to the harness, engine inter-
face board (A31), analog board (A33),
or digital board (A32).
*CAUTION: Wearing a wrist strap, set S12 to Off and A32 S5 to Standby before connecting/disconnecting harness plugs.
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