106 RENR5042-02 Troubleshooting Section Repair: Repair the connectors and/or the wiring. Replace parts, if necessary. Ensure that all of the seals are properly in place and ensure that the connectors are completely coupled. Verify that the original problem is resolved. B. Measure the resistance between P1-8 (Cat Data Link +) and P1-9 (Cat Data Link −). Expected Result: STOP. Each check of the resistance is less than ten Ohms. Test Step 2. Check for a Short Circuit Results: A. Disconnect the J1 connector. OK Each check of the resistance is less than ten Ohms. B. Disconnect Cat ET from the service tool connector. Repair: Perform the following procedure: C.
Measure the resistance between the points that are listed in Table 17. Be sure to wiggle the wires in the harnesses as you make each resistance measurement. 1. Connect the J1/P1 connectors. Connect Cat ET to the service tool connector. 2. Check the Cat Data Link for proper operation. If the Data Link does not operate correctly, there may be a problem with the ECM. Table 17 Temporarily install a new ECM. Check the Cat Data Link again. If the new ECM solves the problem, install the original ECM and verify that the original problem returns. If the new ECM operates correctly and the original ECM does not operate correctly, replace the original ECM. Verify that the problem is resolved. STOP.
Not OK – At least one check of the resistance is greater than ten Ohms. There is an open circuit or excessive resistance in the harness. There may be a problem with a connector. Expected Result: Each check of the resistance indicates an open circuit. Repair: Repair the wiring and/or the connectors. Replace parts, if necessary. Verify that the original problem is resolved. Results: OK Each check of the resistance indicates an open circuit. Proceed to Test Step 3. STOP. Not OK At least one check of the resistance does not indicate an open circuit. There is a short circuit in the harness or in a connector. i02289833 Coolant Level Sensor Circuit - Test Repair:
Repair the connectors and/or the wiring. Replace parts, if necessary. Verify that the original problem is resolved. SMCS Code: 5574-038-CLT System Operation Description: STOP. Test Step 3. Check for an Open Circuit Use this procedure to troubleshoot any suspect problems with the engine coolant level sensor. A. Fabricate a jumper wire. Use the jumper wire in order to create a short circuit between terminals J63-D (Cat Data Link +) and J63-E (Cat Data Link The engine coolant level sensor provides a means of monitoring the engine coolant level in order to warn the operator in the event that the coolant level is low.
The engine coolant level sensor is usually located in the top tank of the radiator. The sensor should be immersed in coolant at all times. Resistance Measurements for the Cat Data Link Connector and Terminal Terminal P1-8 (Cat Data Link +) All of the other terminals on the P1 connector Ground stud P1-9 (Cat Data Link -) All of the other terminals on the P1 connector Ground stud