HYDRAULIC AR 1863942 - Caterpillar

Illustration 1 g01350067
Power terminals on the service tool connectors. (A) +Battery (B) −Battery
Refer to Illustration 1. Check for battery voltage at the service tool connector.Expected Result:Battery voltage is not present at the service tool connector.Results:
OK - Battery voltage is not present at the service tool connector.Repair: Inspect the wiring and fuses. Determine the cause of the missing voltage. Make the necessary repairs. Attempt to establish communication after the electrical power is at the service tool connector. Proceed to Test Step 5 if the service tool does not communicate.
Not OK - Battery voltage is present at the service tool connector.Repair: Verify that the cable between the service tool connector and the communication adapter is OK. Replace the cable, if necessary.Replace the communication adapter if the following conditions are true:
There is power at the cable's "Data Link" connector.
The communication adapter's "Power" indicator is not illuminated.STOPTest Step 5. Check the Service Tool Connector
Perform a visual inspection of the wiring to the service tool connector. Look for these problems:
Harness damage that is caused by chafing
Harness damage that is caused by excessive heat
Inspect the service tool connector. Pull on each wire that is associated with the data link. This verifies that each wire is properly attached to the terminal and that the terminal is properly inserted into the connector.Repair any wiring problems. Attempt to establish communication after the wiring has been repaired.Expected Result:The harness for the service tool is OK.Results:
OK - The harness for the data link is OK.Repair: Refer to Troubleshooting, "Cat Data Link - Test" in order to test the circuit for the Cat Data Link.STOP