AXLE AR-OSCILLATING 4504326 - Caterpillar

Table 1
J1-67     J1-68     J1-69    
0.5V to 4.5V     0.5V to 4.5V     0V    Expected Result:The shield wire does not have a voltage. A voltage on the shield wire means that there is a short to the battery. The voltage of the wires for the Data Link is correct.Results:
OK - The voltage of the wires for the Data Link is correct. Proceed to Test Step 3.
NOT OK - The voltage is greater than 4.5 V.Repair: Repair the machine harness or replace the harness. Proceed to Test Step 8.
NOT OK - The voltage is less than 0.5 V. Proceed to Test Step 3.Test Step 3. CHECK FOR A SHORT TO GROUND.
Turn the keyswitch and the disconnect switch to the OFF position.
Disconnect the J1 harness connector for the ECU. Disconnect the harness connector for the shift pad.
Measure the resistance of wire (K900-YL) to an unpainted frame ground. Measure the resistance of wire (K990-GN) to an unpainted frame ground.Expected Result:The resistance measurement is greater than 5000 ohms.Results:
OK - The resistance measurement is correct. Proceed to Test Step 5.
NOT OK - The resistance measurement is not correct. The wire with the low resistance measurement is shorted to ground.Repair: Repair the machine harness or replace the machine harness. Proceed to Test Step 8.Test Step 4. CHECK FOR A SHORT IN THE WIRES FOR THE DATA LINK.
The keyswitch and the disconnect switch remain in the OFF position.
Disconnect the terminating resistors if the resistors are a part of the circuit.
Measure the continuity between the data link wires.Expected Result:The resistance measurement is greater than 5000 ohms.Results:
OK - The resistance measurement is correct. Proceed to Test Step 5.
NOT OK - The resistance measurement is not correct. The wires for the data link are connected.Repair: Repair the machine harness or replace the machine harness. Proceed to Test Step 8.Test Step 5. CHECK FOR AN OPEN IN THE WIRES FOR THE DATA LINK.
The keyswitch and the disconnect switch remain in the OFF position.
Disconnect wire (K900-YL) and wire (K990-GN) from the ECU.
Measure the continuity of each wire individually. Use a jumper wire in order to connect to the other end of the wire in question.Expected Result:There is continuity from one end of the wire to the other end.Results:
OK - There is continuity from one end of the wire to the other end. The wire is correct. Proceed to Test Step 6.
NOT OK - There is not continuity from one end of the wire to the other end. The wire is not correct.Repair: Repair the machine harness or replace the machine harness. Proceed to Test Step 8.Test Step 6. CHECK THE TERMINATING RESISTORS.Note: Two 120 Ohm resistors should be located on the CAN Data Link. A resistance of 60 ohms should be found at any point on the data link. Terminating resistors are not always used on data links. The resistance measurement should be greater than 5000 ohms if resistors are not intentionally a part of the circuit.
The keyswitch and the disconnect switch remain in the OFF position.
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