PIPE,SUPPLY 0934734 - Caterpillar

Machine ECM
The following is a list of Diagnostic Trouble Codes (DTCs) that are associated with the sensor power supply circuits of the machine.
Table 1
Machine ECM (MID 039)
DTC Code Description System Response
41 -6 8 VDC Power Supply: Current Above Normal Multiple failures of systems or components associated with this code.
262-6 5 VDC Power Supply: Current Above Normal Multiple failures of systems or components associated with this code. The diagnostic code is recorded when the interface module indicates that the current of the sensor supply circuit is too high.Possible causes of an FMI 6 Diagnostic code are:
The sensor supply output is shorted to ground.
A sensor in the power supply circuit has failed.
The ECM may have failed. This situation is unlikely.
Illustration 1 g06130794
Sensor supply schematic
Note: The diagram above is a simplified schematic of the Machine ECM connections. The schematic is electrically correct. However, not all the possible harness connectors are shown. Refer to the latest revision of Electrical Schematic, UENR3604 for the complete schematic.Diagnostic Trouble Code Procedure
Note: Prior to beginning this procedure, inspect the harness connectors that are involved in this circuit. Poor connections can often be the cause of a problem in an electrical circuit. Verify that all connections in the circuit are clean, secure, and in good condition. If a problem with a connection is found, correct the problem and verify that the diagnostic code is active before performing a troubleshooting procedure. For sensors powered via the fuse panel, check the condition of the appropriate fuse before beginning the troubleshooting procedure.
Identify the active FMI code associated with the components.
Determine which code is present and use the list below to determine which procedure to follow.
FMI 6 diagnostic code, proceed to Table 2.
Table 2
FMI 6 Troubleshooting
Troubleshooting Test Steps Values Results
1. Check The Voltage At The ECM
A. Turn the key start switch and the battery disconnect switch to the OFF position.
B. At