
RENR5622 43
Troubleshooting Section
Table 20
Event Code
Description
Conditions wh
ich Generate this Code
System Respon
se
E101 High Crankcase Pressure
Warning
Engine crankcase pressure is above
the trip point for high pressure.
Thecodeisactiveandthecodeis
logged.
Probable Causes
•
Worn engine components
•
Plugged crankcase breather
Recommended Actions
Engine Components
Damaged pistons or rings can cause too much
pressure in the crankcase. This condition will cause
the engine to run rough. There will be more than the
normal amount of fumes (blowby) rising from the
crankcase breather. The breather can then become
restricted in a very short time, causing oil leakage
at gaskets and seals that would not normally have
leakage.Blowbycanalsobecausedbywornvalve
guides or by a failed turbocharger seal.
Crankcase Breather
A plugged crankcase breather will cause excessive
crankcase pressure. Leakage of the crankshaft seal
can occur. Sealing of the piston rings can be lost.
This will enable crankcase blowby to further increase
the crankcase pressure.
The 8T-2700 Blowby/Air Flow Indicator is used
to check the amount of blowby. Refer to Special
Instruction, SEHS8712, “Using the 8T-2700
Blowby/Air Flow Indicator” for the test procedure for
checking the blowby.
i02419115
ECM Will Not Accept Factory
Passwords
SMCS Code: 1901-038
Probable Causes
One of the following items may not be recorded
correctly on the Caterpillar Electronic Technician
(ET):
•
Passwords
•
Serial numbers
•
Total tattletale
•
Reason code
Recommended Actions
1. Verify that the correct passwords were entered.
Check every character in each password. Remove
the electrical power from the engine for 30
seconds and then retry.
2. Verify that Cat ET is on the “Factory Password”
screen.
3. Use Cat ET to verify that the following information
has been entered correctly:
•
Engine serial number
•
Serial number for the electronic control module
•
Serial number for Cat ET
•
Total tattletale
•
Reason code
i02385563
ECMWillNotCommunicate
with Other S ystems or Display
Modules
SMCS Code: 1901-038
The probable root causes are listed below:
•
Electronic Control Module (ECM)
•
Connector or wiring problem
•
Cat Data Lin k
Perform the following checks:
1. Connect the Caterpillar Electronic Technician
(ET). If the ECM does not communicate with the
Cat ET, perform the diagnostic functional test
Troubleshooting, “Electronic Service Tool Will Not
Communicate With ECM”.
2. Check for correct installation of the ECM
connectors J1/P1 and J2/P2. Refer to the
diagnostic functional test Troubleshooting,
“Inspecting Electrical Connectors”.