TUBE AS 4828553 - Caterpillar

Table 4
FMI 12 Troubleshooting
Troubleshooting Test Steps Values Results
1. Inspect The Harness Connections
A. Turn key start switch and disconnect switch OFF.
B. Inspect all harness connections related to the CAN data link. Make sure that the connectors are clean and tight.
C. Check the connectors for proper mating. Ensure that all the seals are present and in place.
D. Check the harness for signs of damage or abrasion.
E. Check the wires at the connector. Ensure that the wires are secured tightly into the connector. Take care not to pull the wire out of the connector.
F. Check the exposed wires at the connectors for nicks or signs of abrasion.
G. Check for moisture inside the connector.
The machine harness connectors are tight and free of corrosion. OK - The machine harness connectors are tight and free of corrosion.
Proceed to Test Step 2.
NOT OK - The machine harness connectors are in need of repair.
Repair: Repair or replace the machine harness.
Proceed to Test Step 2.
2. Check If The Diagnostic Code Remains
A. Turn the key start switch and the disconnect switch ON.
B. Clear all diagnostic codes.
C. Operate the machine.
D. Stop the machine and engage the safety lock.
E. 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, the sensor may require replacement.
STOP.