Caterpillar Monitoring System / Diagnostic Code List
Diagnostic Code List
Table 1
Diagnostic Codes For The Caterpillar Monitoring System (MID No. 030)
(1)
CID/FMI Description
CID 0096 - Level Sender (Fuel):
FMI 03 Signal voltage above normal or short to +battery
FMI 04 Voltage below normal or short to ground
FMI 08 Signal is abnormal
CID 0096 - Level Sensor (Fuel):
FMI 08 Signal is abnormal
CID 0100 - Pressure Sensor (Engine Oil):
FMI 08 Signal is abnormal
CID 0110 - Temperature Sensor (Engine Coolant):
FMI 04 Voltage below normal or short to ground
FMI 08 Signal is abnormal
CID 0177 - Temperature Sensor (Transmission Oil):
FMI 04 Voltage below normal or short to ground
FMI 08 Signal is abnormal
CID 0248 - Data Link:
FMI 02 Data erratic, intermittent, or incorrect
CID 0263 - Sensor Power Supply:
FMI 03 Signal voltage above normal or short to +battery
FMI 04 Voltage below normal or short to ground
CID 0271 - Alarm (Action):
FMI 03 Signal voltage above normal or short to +battery
FMI 05 Current below normal or open circuit
FMI 06 Current above normal or short to ground
CID 0324 - Lamp (Action):
FMI 03 Signal voltage above normal or short to +battery
FMI 05 Current below normal or open circuit
FMI 06 Current above normal or short to ground
CID 0427 - Temperature Sensor (Front Axle Oil):
FMI 08 Signal is abnormal
CID 0428 - Temperature Sensor (Rear Axle Oil):
FMI 08 Signal is abnormal
CID 0600 - Temperature Sender (Hydraulic Oil):
FMI 03 Signal voltage above normal or short to +battery
FMI 04 Voltage below normal or short to ground
FMI 08 Signal is abnormal
CID 0600 - Temperature Sensor (Hydraulic Oil):
FMI 08 Signal is abnormal
CID 0819 - Display Data Link:
FMI 02 Data erratic, intermittent, or incorrect
FMI 15 Invalid code
FMI 31 Invalid code
CID 0821 - Display Power Supply:
FMI 03 Signal voltage above normal or short to +battery
FMI 04 Voltage below normal or short to ground
CID 0826 - Temperature Sender (Torque Converter Oil):
FMI 03 Signal voltage above normal or short to +battery
FMI 04 Voltage below normal or short to ground
FMI 08 Signal is abnormal
CID 0826 - Temperature Sensor (Torque Converter Oil):
FMI 08 Signal is abnormal
CID 0830 - Temperature Sensor (Brake Oil):
FMI 08 Signal is abnormal
CID 1791 - Saw Pressure Sensor:
FMI 08 Signal is abnormal
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This table pertains only to diagnostic codes with a MID of 030.
Note: Every machine may not have all of the diagnostic codes that are listed in the preceding
table. Also, every machine may not have all the FMI for a given CID.
Note: The preceding table shows the diagnostic codes for the Caterpillar Monitoring System. When
the Caterpillar Monitoring System is in the service mode, diagnostic codes from the other electronic
control modules are shown on the display area of the Caterpillar Monitoring System. The
information from the diagnostic code is transferred from other electronic control modules via the
Cat Data Link to the main display module. This diagnostic information is shown when the main
display module is in the service mode. The module identifier (MID) indicates the electronic control
module that is sending the diagnostic code. The MID for the Caterpillar Monitoring System is "030".
This Service Manual is used for diagnostic codes with a MID of "030". The MID of other electronic
control modules on a particular machine are listed on the Electrical System Schematic.
Troubleshooting information for those diagnostic codes can be found in the service manual for that
system.
Note: When a sensor diagnostic code is present, the corresponding warning for that sensor is also
activated for the operator. For example, if the signal wire for the engine coolant temperature
sensor is shorted to the +battery, then the following actions take place:
The corresponding diagnostic code is stored in memory.
The gauge for the engine coolant temperature is indicating in the warning region.
The action lamp is FLASHING.
Notice that the second and third above items are the same warning indications that are activated if
the engine overheats.
