SUPPORT 1207825 - Caterpillar

Machine ECM
The "Switch Panel" receives an input signal from the "Machine ECM" to activate the "Crane Operation Mode Light".Note: Before beginning this procedure, review the diagnostic code list. A diagnostic code of DTC 2300-9 indicates a failure of the CAN Data Link connecting the "Switch Panel" to the "Machine ECM". In the event this code is active, complete the CAN Data Link troubleshooting process.The following is a list of codes are associated with the indicator lamp connected to the Switch Panel.
Table 1
Machine ECM (MID 299)    
DTC    Code Description    System Response    
2695-3     Caution Lamp for Crane : Voltage Above Normal     Indicator lamp will be on continuously.    
2695-6     Caution Lamp for Crane : Current Above Normal     Indicator lamp will be on continuously.    
Possible Causes for an FMI 3 Diagnostic code are:
The energize circuit of the indicator lamp is shorted to +battery.
The indicator lamp has failed.
The Switch Panel or Machine ECM have failed. This situation is unlikely.Possible Causes for an FMI 6 Diagnostic code are:
A short to ground exists.
The indicator lamp has failed.
The Switch Panel or Machine ECM have failed. This situation is unlikely.
Illustration 1 g03694839
Schematic of the indicator lamp circuitNote: The diagram above is a simplified schematic of the Switch Panel and the Indicator Lamp connections. The schematic is electrically correct. However, not all of the possible harness connectors are shown. Refer to the latest revision of Electrical Schematic, UENR5805 for the complete schematic.Diagnostic Trouble Code Procedure
Note: Prior to beginning this procedure, inspect the harness connectors that are involved in the 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 this diagnostic code is active before performing this procedure.
Table 2
Troubleshooting Test Steps    Values    Results    
1. Identify Active FMI Code Associated With Indicator Lamp Circuit    
Code present.     FMI 3 diagnostic code, proceed to Test Step 2.
FMI 6 diagnostic code, proceed to Test Step 3.