TUBE AS 1724162 - Caterpillar

Possible causes for an FMI 3 Diagnostic code are:
The energize circuit is shorted to another voltage source.
The switch panel has failed.
The Machine ECM has failed. A failure of the Machine ECM is unlikely.Possible causes for an FMI 6 Diagnostic code are:
The energize circuit of the module is shorted to a ground source.
The control module has failed.
The switch panel has failed.
The Machine ECM has failed. A failure of the Machine ECM is unlikely.
Illustration 1 g06057614
Window Wiper Control schematic
Note: The diagram above is a simplified schematic of the Switch Panel connections. The schematic is electrically correct. However, not all the possible harness connectors are shown. Refer to the latest revision of Electrical Schematic, UENR6930 for 320D2 and 320D2 GC excavator electrical systems.Diagnostic Trouble Code Procedure
Note: Prior to beginning this procedure, inspect the harness connectors 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. Verify that the diagnostic code is active before performing a troubleshooting procedure.
Identify the active FMI code associated with the faulty component.
Determine which code is present and use the list below to determine the correct procedure to follow.
FMI 3 diagnostic code, proceed to Table 2.
FMI 6 diagnostic code, proceed to Table 3.
Table 2
Begin Process For FMI 3 Troubleshooting HERE
Troubleshooting Test Steps Values Results
1. Check The Energize Circuit Of The Wiper Control For A Short
A. Key start switch and disconnect switch to the OFF position.
B. Disconnect all harness connectors from the switch panel.
C. Disconnect the wiper control module from the machine harness.
D. At the switch panel, identify the wiper intermittent pin locations (refer to the schematic above).
E. Measure the resistance from the wiper intermittent connectors on the switch panel and all other contacts of the switch panel.
Each reading is greater than 5K Ω. OK - All measurements are greater than 5K Ω.
Proceed to Test Step 2.
NOT OK - Resistance is less than 5 Ω, a short exists in signal circuit.
Repair: Repair or replace machine harness.
Note: A resistance greater than 5 Ω but less than 5K Ω indicates a loose connection or a corroded connection in the circuit. A resistance measurement greater than 5K Ω indicates an open in the circuit.
STOP
2. Check The Operation Of The ECM
Note: The disconnect and the key start switch remain in the OFF position. The machine harness connectors for the wiper module and the switch panel remain disconnected.
A. At the machine harness connector C302 for the switch panel, use a 151-6320 Removal Tool to remove signal wire and socket.
B. Reconnect the machine harness C301, C302, and C303 connectors to the switch panel.
C. Turn the disconnect switch and the key start switch to the ON position.
D. Observe the status of the active diagnostic code.
The diagnostic code is no longer active. An FMI 5 diagnostic code is now active. OK - The diagnostic code is no longer active. An FMI 5 code is