SHAFT GP-COUNTER 3915879 - Caterpillar

Table 1
J1-67     J1-68     J1-69    
0.5 V to 4.5 V     0.5 V to 4.5 V     0V    Expected Result:The CAN shield does not have a voltage. A voltage on the CAN shield 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 volts.Repair: Repair the machine harness or replace the harness. Proceed to Test Step 8.
NOT OK - The voltage is less than 0.5 volts. 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