
RENR5622 45
Troubleshooting Section
Note: The new ECM does not have a flash file.
The engine will
not start and the engine will not
communicate with Cat ET until the flash file has
been installed. Refer to Troubleshooting, “Flash
Programming”
.
Cat Data Link
Troubleshoot the Cat Data Link for possible problems.
Refer to Troubleshooting, “Cat Data Link”.
i02385567
Engine Cranks but Will Not
Start
SMCS Code: 1000-038; 1901-038
Probable Causes
•
Diagnostic codes
•
Event codes
•
Electrical power supply to the Electronic Control
Module (ECM)
•
Starting aids (if applicable)
•
Engine shutdown switches
•
Engine speed/timing
•
Unit injectors
•
Fuel supply
•
Combustion
Recommended Actions
Diagnostic Codes, Event Codes, and
Electric al Power Supply to the E CM
Certain diagnostic codes and/or event codes may
prevent the engine from starting. Connect the
Caterpillar Electronic Technician (ET) and check for
active codes and/or for logged codes. Troubleshoot
any codes that are present before continuing with
this procedure.
Note: If Cat ET will not communicate with the
ECM, the problem is most likely with the electrical
power supply to the ECM. Refer to Troubleshooting,
“Electrical Power Supply”.
Starting Aids
1. If cold ambient conditions exist, check operation
of starting aids. Verify that the ether system is
operating cor
rectly. Refer to Troubleshooting,
“Ether Injection System”.
2. Ensure the pro
per operation of the jacket water
heater. Repair the jacket water heater and/or
replace the jacket water heater, if necessary.
3. Check for presence of solidified fuel (wax).
Engine Shutd
own Switches (If Equipped)
The engine shutdown switches should be in the
OFF position
. Use Cat ET to verify the status of the
shutdown switches. When a shutdown occurs, the
keyswitch must be turned to the OFF position for at
least 15 seco
nds before restarting the engine.
Engine Speed/Timing
1. Crank the engine and observe the engine speed
on the Cat ET status screen. If Cat ET indicates
zero rpm, re
fer to Troubleshooting, “Engine
Speed/Timing Sensor”.
Note: Upon i
nitial cranking, the status for engine
speed may indicate that the engine speed signal is
abnormal. This message will be replaced with an
engine spe
ed once the ECM is able to calculate a
speed from the signal.
2. Ensure tha
t the timing reference gear is installed
correctly. The engine will not start if the gear was
installed backward. Check for proper orientation
between t
he crankshaft and camshaft drive gears.
Correct the orientation and/or replace the drive
gear, if necessary. Refer to the Disassembly and
Assembly
manual.
Unit Injectors
Perform the “Injector Solenoid Test” on Cat ET in
order to determine if all of the injector solenoids
are being
energized by the ECM. Refer to
Troubleshooting, “Injector Solenoids” for additional
information.
Fuel Sup ply
1. Visuall
y check the fuel level. Do not rely on the fuel
gauge only. If necessary, add fuel. If the engine
has been run out of fuel, it will be necessary to
prime th
e fuel system. Refer to Operation and
Maintenance Manual for the correct procedure.
2. Check t
he fuel lines for the following problems:
restrictions, collapsed lines, and pinched lines. If
problems are found with the fuel lines, repair the
lines a
nd/or replace the lines.