SEGMANT 6T4178 - Caterpillar

Table 2
FMI 3 Troubleshooting    
Troubleshooting Test Steps    Values    Results    
1. Check The Signal Circuit For A Short
A. Turn the key start switch and disconnect switch OFF.
B. Disconnect the harness connectors from the Monitoring System Display.
C. Disconnect the travel alarm from the machine harness.
D. At the connector for the Monitoring System Display, measure the resistance between the travel alarm contact and all sources for +battery.    
Each value is greater than 5K Ω.     OK - Each value is 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 that is greater than 5 Ω but less than 5K Ω would indicate a loose or corroded connection in the circuit. A resistance value that is greater than 5K Ω would indicate an open in the circuit.
Proceed to Test Step 2.    
2. Check If The Diagnostic Code Remains
A. Reconnect all harness connectors. Return machine to normal operating condition.
B. Turn the key start switch and the disconnect switch ON.
C. Clear all diagnostic codes.
D. Operate the machine.
E. Stop the machine and engage the safety lock lever.
F. Check if the diagnostic code is active.    
The diagnostic code is no longer present.     OK - The diagnostic code does not exist at this time. The initial diagnostic code may have been caused by poor electrical connection or short at one of the harness connections. Resume machine operation.
STOP.
NOT OK - The diagnostic trouble code has not been corrected. If the diagnostic code has not been corrected after performing the procedure a second time, the Monitoring System Display may require replacement.
Prior to replacing the Monitoring System Display, always contact the Technical Communicator at your dealership for possible consultation with Caterpillar. This consultation may affect repair time.
STOP.    
Table 3
FMI 5 Troubleshooting    
Troubleshooting Test Steps    Values    Results    
1. Check The Alarm
A. Turn the key start switch and the disconnect switch OFF.
B. Disconnect the alarm from the machine harness.
C. Place a jumper wire between contact 1 and contact 2, at the alarm's harness connector.
D. Turn the key start switch and the disconnect switch ON. Do Not start the engine.    
The FMI 5 diagnostic code changes to an FMI 6 after the jumper wire is installed.     OK - The harness is correct. The FMI 5 diagnostic code changes to an FMI 6 when the jumper wire is installed. The alarm has failed.
Repair: Replace the alarm.
Proceed to Test Step 3.
NOT OK - The diagnostic code remains active.
Proceed to Test Step 2.    
2. Check The Harness For An Open
A. Turn the key start switch and the disconnect switch OFF.
B. Disconnect the harness connectors from the Monitoring System Display.
C. The jumper wire remains that was installed in the previous test step remains in place.
D. At the machine harness connector for the Monitoring System Display, measure the resistance between the signal contact and ground contact.    
Each reading is less than