Caterpillar Monitoring System Detected Diagnostics (1) For troubleshooting, see the procedure with the same CID and FMI.     | |
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CID/FMI     | Description     |
CID 0100 - Engine Oil Pressure Sensor:     | |
FMI 08     | Abnormal Signal     |
CID 0102 - Inlet Air Pressure (Boost) Sensor:     | |
FMI 08     | Abnormal Signal     |
CID 0110 - Engine Coolant Temperature Sensor:     | |
FMI 08     | Abnormal Signal     |
CID 0172 - Intake Manifold Temperature Sender:     | |
FMI 04     | Signal below normal or a short to ground     |
CID 0175 - Engine Oil Temperature Sender:     | |
FMI 04     | Signal below normal or a short to ground     |
CID 0248 - Data Link:     | |
FMI 02     | Data erratic intermittent or incorrect     |
CID 263 - 8 Volt Sensor Power Supply:     | |
FMI 03     | Voltage above normal or short to +Battery     |
FMI 04     | Voltage below normal or short to ground     |
CID 271 - Action Alarm:     | |
FMI 03     | 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 0460 - Fuel Pressure Sensor:     | |
FMI 08     | Abnormal Signal     |
CID 0819 - Display Data Link:     | |
FMI 02     | Data erratic, intermittent, or incorrect     |
CID 0821 - 9 Volt Sensor Power Supply:     | |
FMI 03     | Voltage above normal or short to +Battery     |
FMI 04     | Current below normal or short to ground     |
CID 0827 - "LH" Exhaust Temperature Sender:     | |
FMI 08     | Abnormal Signal     |
CID 0828 - "RH" Exhaust Temperature Sender:     | |
FMI 08     | Abnormal Signal     |
( 1 ) | For the Caterpillar Monitoring System, the MID is "030". This table pertains only to diagnostics with an MID of "030". |
When the main display module detects a diagnostic code while the main display module is in Normal mode, the "SERV CODE" indicator in the Display Area is activated. The Service Mode shows the diagnostic code for the detected diagnostic. For more detailed information, see Systems Operation, "Service Mode".
Note: When a diagnostic code is present, the corresponding warning for that sensor is also activated for the operator. For example, if this signal wire for the engine coolant temperature is shorted to +Battery, then the Caterpillar Monitoring System will respond in the following manner.
- The "SERV CODE" indicator is turned ON.
- The corresponding diagnostic code is stored in memory.
- The gauge for engine coolant temperature shows in the warning region.
- The alert indicator begins flashing.
The indications for Step 3 and Step 4 are the same warning indications that would be activated if the engine actually overheated.
Note: This Service Manual applies to Caterpillar Monitoring System diagnostics. When in Service Mode, diagnostics from the Engine Control Module (ECM) can also be displayed. The Caterpillar data link facilitates the transfer of diagnostic information from the engine ECM to the Main Display Module. This diagnostic information is shown when the Main Display Module is in Service Mode (Mode 2). The Module Identifier (MID) tells which electronic module is providing the diagnostic code. The MID for the Caterpillar Monitoring System is "030". Troubleshooting information for the MID's of other Caterpillar Electronic Module Systems can be found in the electronic troubleshooting guides for those systems.