Each diagnostic code consists of the following items: a component identifier (CID), a failure mode identifier (FMI) and "DIAG" indicator. These items are shown on the upper display. The diagnostic code indicator can be active or inactive. The CID identifies the component that has a problem. The FMI describes the nature of the diagnostic code. When the "DIAG" indicator is FLASHING, the diagnostic code is active. This means that the diagnostic code is present. When the "DIAG" indicator is ON CONTINUOUSLY, the diagnostic code is inactive and the CID FMI is recorded in the fault log. See Systems Operation, "Fault Log Viewing OP1" in order to view the fault log. When the "DIAG" indicator is not showing, there are NO diagnostic codes that are detected or recorded. Service personnel interpret the identifiers in order to assist with troubleshooting.
When a diagnostic code occurs, the GSC+ FLASHES the "DIAG" indicator. The GSC+ determines the type of problem that is represented by the diagnostic code. There are two types of problems: an alarm fault and a shutdown fault. Then, the GSC+ FLASHES the corresponding fault alarm indicator or fault shutdown indicator. The CID FMI is immediately shown on the upper display when there is a shutdown fault. When there is an alarm fault, the "alarm codes" key is pressed first. Then, the CID FMI is shown on the upper display.
The GSC+ has a fault log to help with troubleshooting of diagnostic codes. Inactive diagnostic codes (CID FMI) are recorded in the fault log for viewing at a later time. The total number of occurrences are shown on the upper display together with the CID and the FMI. An active alarm fault becomes inactive when the problem is no longer occurring. Also, the engine control switch (ECS) should be turned to the OFF/RESET position for shutdown faults. The "DIAG" indicator is FLASHING when the problem is currently occurring. The "DIAG" indicator is ON CONTINUOUSLY when a previous problem existed, but the"DIAG" indicator is inactive at the present time. See Testing And Adjusting, "Fault Log Viewing OP1".
During troubleshooting, it is sometimes necessary to disconnect the harness connector from the GSC+ and diagnostic codes are created. Because of internal circuitry, the GSC+ recognizes this condition as a FMI 03 or FMI 02 for certain components. An FMI 03 or FMI 02 describes the voltage that is above normal. This fact is also used as an aid in the troubleshooting process. Clear these created diagnostic codes after the particular diagnostic code is corrected and the diagnostic code is cleared. The following diagnostic codes are recorded in a properly operating system when the harness connector is removed from the GSC+.
CID 0100 FMI 02 - Engine Oil Pressure Sensor (EUI Engines)
CID 0100 FMI 03 - Engine Oil Pressure Sensor (MUI Engines and PEEC Engines)
CID 0110 FMI 02 - Engine Coolant Temperature Sensor (EUI Engines)
CID 0110 FMI 03 - Engine Coolant Temperature Sensor (MUI Engines and PEEC Engines)
CID 0111 FMI 03 - Fluid Level Sensor for Engine Coolant
CID 0175 FMI 03 - Engine Oil Temperature Sensor
CID 0190 FMI 03 - Engine Speed Sensor
CID 0336 FMI 02 - Engine Control Switch
An FMI 02 describes an incorrect signal.
Note: A CID 0111 FMI 03 will only be recorded if the machine is equipped with the proper sensors. A CID 0175 FMI 03 will only be recorded if the machine is equipped with the proper sensors.
Clear diagnostic codes after the problem is investigated or the problem is corrected. This will avoid a confusion during a future service call. The "DIAG" indicator is OFF when all diagnostic codes are cleared from the fault log and no active diagnostic codes exist. See Testing And Adjusting, "Fault Log Clearing OP4".
Diagnostic Codes
| Diagnostic Codes (1) |
|
|---|---|
| CID No. / FMI No. | Description |
| CID 100 -Engine Oil Pressure Sensor | |
| FMI 2 | Incorrect signal |
| FMI 3 | Voltage above normal |
| FMI 4 | Voltage below normal |
| CID 110 - Engine Coolant Temperature Sensor | |
| FMI 2 | Incorrect signal |
| FMI 3 | Voltage above normal |
| FMI 4 | Voltage below normal |
| CID 111 - Fluid Level Sensor for Engine Coolant | |
| FMI 3 | Voltage above normal |
| CID 168 - Electrical System Voltage | |
| FMI 3 | Voltage above normal |
| FMI 4 | Voltage below normal |
| CID 175 - Engine Oil Temperature Sensor | |
| FMI 2 | Incorrect signal |
| FMI 3 | Voltage above normal |
| FMI 4 | Voltage below normal |
| CID 190 - Engine Speed Sensor | |
| FMI 2 | Incorrect signal |
| FMI 3 | Voltage above normal |
| CID 248 - CAT Data Link | |
| FMI 9 | Abnormal update |
| CID 268 - EMCP Electronic Control | |
| FMI 2 | Incorrect signal |
| CID 269 - Sensor Power Supply | |
| FMI 3 | Voltage above normal |
| FMI 4 | Voltage below normal |
| CID 333 - Alarm Module Control | |
| FMI 3 | Voltage above normal |
| FMI 4 | Voltage below normal |
| CID 334 - Spare Output | |
| FMI 3 | Voltage above normal |
| FMI 4 | Voltage below normal |
| CID 336 - Engine Control Switch | |
| FMI 2 | Undefined state |
| CID 441 - Electronic Governor Relay | |
| FMI 12 | Failed component |
| CID 442 - Generator Fault Relay | |
| FMI 12 | Failed component |
| CID 443 - Crank Termination Relay | |
| FMI 12 | Failed component |
| CID 444 - Starting Motor Relay | |
| FMI 12 | Failed component |
| CID 445 - Run Relay | |
| FMI 12 | Failed component |
| CID 447 - Fuel Control Relay | |
| FMI 12 | Failed component |
| CID 448 - Programmable Spare Relay | |
| FMI 12 | Failed component |
| CID 475 - Relay Driver Module | |
| FMI 3 | Voltage above normal |
| FMI 4 | Voltage below normal |
| CID 500 - EMCP Electronic Control | |
| FMI 12 | Failed component |
| CID 566 - Unexpected Shutdown | |
| FMI 7 | Improper mechanical response |
| CID 590 - Engine Electronic Control Module | |
| FMI 9 | Abnormal update |
| CID 770 - Data Link for Customer Communication Module | |
| FMI 9 | Abnormal update |
| CID 859 - Kilowatt Level Output | |
| FMI 3 | Voltage above normal |
| FMI 4 | Voltage below normal |
| CID 1178 - Pressure Sensor for Machine Overload Warning | |
| FMI 3 | Voltage above normal |
| ( 1 ) | For troubleshooting, refer to the procedure with the same CID and the same FMI numbers. |
Example
 | |
| Illustration 1 | g00615969 |
The upper display is showing a "CID 190 FMI 3" diagnostic code. | |
 | |
| Illustration 2 | g00608337 |
The upper display is showing a "CID 190 E FMI 3" diagnostic code. | |
The "E" which is shown in Illustration 2 indicates that the engine ECM has generated the diagnostic code on EUI engines. The EMCP II+ will display all diagnostic codes from the engine ECM. This assists the operator in diagnosing problems with the EUI engine. See Troubleshooting, RENR2227, "3406E and 3456 Generator Set Engines" for more information.