GENERATOR AR 5N5063 - Caterpillar

Illustration 1 g02356600
ECM +5 VDC sensor supply circuit schematic
This diagnostic code is for the ECM +5 VDC sensor supply. An FMI 06 indicates the ECM has determined the current of the ECM +5 VDC Sensor supply circuit is above normal. Possible causes for this diagnostic code are:
The +5 VDC supply output shorted to ground.
A failed sensor in the +5 VDC supply circuit.
A failed machine ECM, but is most unlikely.Note: The following test procedure may create other diagnostic codes. Ignore these created diagnostic codes now, but clear those codes after the original diagnostic code has been corrected. Note: Poor connections are often the cause of a problem in electrical circuits. Before performing this procedure, inspect all of the harness connectors involved in the circuit. Verify that all of the connections in the circuit are clean, secure, and in good condition. If a problem is found with any of the connections: correct the problem and verify that diagnostic code CID 0262 FMI 06 is still active, before performing the following procedures. System Response:Components that receive power from the +5 VDC sensor supply will not be available. Test Step 1. CHECK THE SENSOR VOLTAGE.
Turn the disconnect switch and the key start switch to the ON position.
Do not disconnect any of the machine harnesses at this time. Check for +5 VDC at the harness connector of every sensor suplied by the ECM +5 VDC power supply. Expected Result:The voltage at each sensor is 5.0 0.5 DCV.Results:
YES - The voltage at each sensor is 5.0 0.5 DCV. Check if the diagnostic code is still active. If the code is still active, go to Test Step 2.
NO - The voltage at one or more of the sensors is not 5.0 0.5 DCV. There is a problem with the ECM +5 VDC voltage supply. Repair: Refer to the complete electrical schematics for the machine. Investigate and repair the +5 VDC power supply problem.After +5 DCV power supply problem is repaired, check if the 0262 FMI 06 diagnostic code is still active. If the diagnostic code is still active, goo to Test Step 2.Test Step 2. CHECK THE SENSORS.
Turn the disconnect switch and the key start switch to the ON position.
One at a time disconnect and reconnect each and every sensor supplied by the ECM +5 VDC sensor power supply.
While each sensor is disconnected, check the status of the CID 0262 FMI 06 diagnostic code. Expected Result:The CID 0262 FMI 06 diagnostic code remains active while each sensor is disconnected and reconnected. Results:
YES - The CID 0262 FMI 06 diagnostic code remains active while each sensor is disconnected and reconnected. None of the sensors are causing the problem. Go to Test Step 3.
NO - While one of the sensors is disconnected, the CID 0262 FMI 06 diagnostic code becomes inactive. That sensor is causing the problem.Repair: Replace that sensor. Go to Test Step 4.Test Step 3. CHECK FOR A SHORT TO GROUND.
Turn the disconnect switch and the key start switch to the OFF position.
Disconnect