
56 RENR5622
Troubleshooting Section
Table 23
Event Code
Description
Default Condi
tions which Generate
this Code
System Respon
se
E272 Air Filter Restriction Warning The inlet air restriction is above the trip
point.
Thecodeisactiveandthecodeis
logged.
Probable Causes
•
Airfilterelement
Recommended Actions
Ai
r Filter E lement
Check the air intake system for plugged air filters or
fo
r damaged air filters. If the engine is equipped with
an air intake precleaner, verify the proper operation
of the air intake precleaner.
i02421043
Intermittent Engine Shutdown
S
MCS Code: 1000-038; 1901-038
Note: Use this procedure only if the engine shuts
d
own completely and the engine must be restarted.
P
robable Causes
•
Crank without injection input (if applicable)
•
Engine shutdown switch (if applicable)
•
E
ngine start switch
•
Engine speed/timing sensor(s)
•
Electrical connections
•
F
uel supply
R
ecommended Actions
Crank Without Injection Inpu t (if
a
pplicable)
If equipped, verify that the plug is installed for the
c
rank without injection input. Ensure that the plug
for the crank without injection input is installed
securely. Refer to the diagnostic functional test
Troubleshooting, “Crank without Injection Input”.
Engine Shutdown Switch (if applicable)
Use Cat ET to monitor the status of the engine. Check
for active shutdowns due to the engine shutdown
sw
itch. Determine the cause for the active shutdown
and make any repairs necessary.
En
gine Start Switch
Check the engine start switch on Cat ET. Look for
an
intermittent problem in the wiring for the engine
start switch.
E
ngine Speed/Timing Sensor
If the following diagnostic codes are applicable,
c
heck Cat ET for any logged diagnostic codes for
the primary engine speed/timing sensor: 190-02,
190-03, and 190-08. If the engine is equipped with
a
secondary engine speed/timing sensor, check for
any of the following logged diagnostic codes: 342-02,
342-03, and 342-08. Refer to the diagnostic functional
test Troubleshooting, “Engine Speed/Timing Sensor”.
Electrical Connectors
1. Check Cat ET for the following logged diagnostic
codes: 168-01 and 168-02. Follow the battery
wires from the ECM back to the battery
compartment. Refer to the electrical system
schematic. Inspect the wires and the power relay.
Check the power to the ECM and to the ground
connections. Refer to the diagnostic functional
test Troubleshooting, “Electrical Power Supply”.
2. Check for correct installation of the J1/P1
and J2/P2 Electronic Control Module (ECM)
connectors. Refer to Troubleshooting, “Inspecting
Electrical Connectors”.
3. Inspect the battery wires from the ECM back to
the battery compartment. Refer to the Electrical
System Schematic. Inspect the wires and the
power relay. Check the power and ground
connections to the ECM. Refer to Troubleshooting,
“Electrical Power Supply” for more information.