LINK-TRACK MASTER 9G8585 - Caterpillar

Illustration 1 g01280661
Schematic of the transmission output speed sensorsThis diagnostic trouble code is associated with the two transmission output speed sensors. The FMI 14 is recorded when the ECU determines that the sensors do not agree with each other and with the output speed sensor for the transmission.The following is a list of possible causes of this diagnostic trouble code:
Intermittent connections or poor connections
A sensor is loose.
A sensor has failed.
The ECU has failed. This is unlikely.Note: The following test procedure may create other diagnostic trouble codes. Ignore these created diagnostic trouble codes and clear the diagnostic trouble codes when the original diagnostic trouble code has been corrected. Ensure that the diagnostic trouble code of SPN 191 FMI 14 is active before performing this procedure. The engine must be running in order for the diagnostic trouble code to be active.Note: Use a digital multimeter for the measurements in this procedure.System Response:Shifting of the transmission is inhibited.Test Step 1. INSPECT THE HARNESS CONNECTIONS FOR THE SENSORS.
Turn the disconnect switch to the OFF position.
Inspect all harness connections that are related to the sensors. Make sure that the connectors are clean and tight.
Check the connectors for proper mating. Ensure that all the seals are present and in place.
Check the harness for signs of damage or abrasion.
Check the wires at the connectors. Ensure that the wires are secured tightly into the connector.
Perform a 45 N (10 lb) pull test on each of the wires that are associated with the circuit. Take care not to pull the wire out of the connectors.
Check the exposed wires at the connectors for nicks or signs of abrasion.
Check for moisture inside the connectors.
Check the connectors for dirty contacts or corroded contacts.
Check each pin and each socket of the machine harness connectors. Ensure that the contacts are properly installed. The contacts should mate correctly when the two pieces of the connector are placed together.Expected Result:The machine harness connectors are tight and free of corrosion.Results:
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 the machine harness or replace the machine harness. STOPTest Step 2. CHECK THE SENSOR