The contacts for the fuel control relay (FCR) are available for use by the customer. The FCR is located within the relay module. The GSC activates the FCR according to the value of setpoint P01. If setpoint P01 is set to 0, the GSC activates the FCR during engine cranking and running. If setpoint P01 is set to 1, the GSC activates the FCR when the engine is stopped.
Note: Whenever the GSC activates the FCR, "K7" is shown on the lower display. "K7" is also shown when the GSC attempts to activate the FCR. When the FCR is not activated, "K7" is not shown. Also, setpoint P01 selects the type of fuel control solenoid:
- 0 for energized position
- 1 for stop position
Procedure
The possible cause of this diagnostic code is an open coil or a shorted coil of the FCR.
The following response is the system response to this fault while the engine is running:
- If a CID 447 occurs, then any equipment that is connected to RM-15 is deactivated.
The following response is the system response to this fault while the engine is NOT running:
- If a CID 447 occurs, then any equipment that is connected to RM-15 is not activated.
The GSC treats this diagnostic code as an alarm fault. Active alarm faults are shown on the display when the key is pressed. Also, the active alarm faults are shown when the ECS is in any position except the OFF/RESET position. Clear the diagnostic code from the fault log after troubleshooting is complete.
Test Step 1. CHECK THE STATUS OF THE DIAGNOSTIC CODE.
- Turn the ECS to the OFF/RESET position and then turn the ECS to the STOP position.
- Press the "Alarm Codes" key.
- Observe the upper display. Check that the CID 0447 FMI 12 is active.
- If the diagnostic code is not active, enter the Service Mode. View the fault log for a OP1. Check that the diagnostic code is inactive.
Expected Result:
A CID 0447 FMI 12 is displayed as an active diagnostic code or CID 0447 FMI 12 is displayed as an inactive diagnostic code.
Results:
- OK - The CID 0447 FMI 12 is active or the CID 0447 FMI 12 is inactive. Proceed to test step 2.
- NOT OK - The CID 0447 FMI 12 has not occurred. The diagnostic code is not active and the diagnostic code is not inactive. Stop.
Test Step 2. CHECK THE INTERNAL CABLE OF THE RELAY MODULE.
Note: Only open the relay module in a dry environment. If the relay module is open for more than twenty minutes replace the desiccant bag which is located within the housing of the GSC. See Testing And Adjusting, "Relay Module - Replace".
- Turn the ECS to the OFF/RESET position.
- Disconnect the battery negative cable.
- Temporarily, remove the relay module from the GSC. See Testing And Adjusting, "Relay Module - Replace".
- Check the cable that attaches the relay module to the GSC.
Expected Result:
The cable should be firmly seated in the connector. The clamp should be in place. The cable should not be damaged.
Results:
- OK - The cable is firmly seated in the connector. The clamp is in place. The cable is not damaged. Reassemble the relay module to the GSC. Proceed to test step 3.
- NOT OK - One or more of the components are damaged or the components are missing.
Repair: Replace the clamp if the clamp is missing. If the cable is damaged, replace the GSC. See Testing and Adjusting, "EMCP Electronic Control (Generator Set) - Replace".
Stop.
Test Step 3. FUNCTIONAL CHECK OF THE FCR
- Turn the ECS to the OFF/RESET position.
- Reconnect the battery negative cable.
- Disconnect all wires from RM-15 and RM-4 of the relay module.
- Remove fuse "F2" from the relay module.
- At the relay module, measure the resistance from RM-15 to RM-4. Make a note of the resistance measurement.
- Turn the ECS to the START position and push in the emergency stop push button (ESPB). Measure the resistance from RM-15 to RM-4. Make a note of the resistance measurement.
Expected Result:
The initial resistance measurement after removing the wires and the fuse from the relay module should be greater than 5000 ohms. The resistance measurement should be less than 5 ohms when the ECS is placed in the START position.
Results:
- OK - The resistance measurements are correct. The problem does not exist at this time. The initial problem was probably caused by a poor electrical connection or a short at one of the harness connectors that was disconnected and reconnected. Resume normal operation and watch for a recurrence. Stop.
- NOT OK - Either one of the resistance measurements are NOT correct. The relay module has failed.
Repair: Replace the relay module. See Testing And Adjusting, "Relay Module - Replace".
Stop.