END-AXLE 8W6466 - Caterpillar

Illustration 1 g06153746
(S/N: M5K)
Schematic of the Data Links
Illustration 2 g06144771
(S/N: M5T)
Schematic of the Data Links
TROUBLESHOOTING PROCEDURE
Prior to beginning this procedure, inspect the harness connectors that are 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. Check the wiring for pinch points or abrasions. Look for and repair areas that indicate wires are exposed. If a problem with a connection is found, correct the problem and verify that this diagnostic code is active before performing a troubleshooting procedure.
Table 2
Troubleshooting Test Steps Values Results
1. Identify The Active DTC Code Associated With The Cat Data Link
Code present FMI 9, proceed to Test Step 2.
FMI 14, proceed to Test Step 6.
Begin Process for FMI 9 Troubleshooting HERE
2. Verify The Hardware And The Software Part Numbers(1)
A. The part number of the flash software for the suspected ECM.
B. The part number of all components related to the faulty Data Link Circuit.
All part numbers are correct. OK - All part numbers are correct.
Proceed to Test Step 3.
NOT OK - All the part numbers are not correct.
Repair: A module has the wrong part number or the incorrect flash software is installed. Replace the incorrect module with a module that has the correct part number. Flash the correct software. See the Testing and Adjusting, "Electronic Control Module (ECM) - Flash Program" section of this manual for additional information.
STOP
3. Check For Shorts
A. The key start switch and disconnect switch remain OFF.
B. Disconnect the machine harness connectors from all electronic control modules that use the suspect Cat Data Link.
C. At the machine harness for the ECM, measure the resistance between the positive contact for the Cat Data Link and all other contacts used in J1 and J2 harness connectors.
C. At the machine harness for the ECM, measure the resistance between the negative contact for the Cat Data Link and all other contacts used in J1 and J2 harness connectors.
The reading is greater than 5K Ω. OK - The harness circuit resistance is correct.
Proceed to Test Step 4.
NOT OK - A reading is less