102 RENR5042-02 Troubleshooting Section Not OK – There is a problem in the wiring harness. 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 problem is resolved. STOP. Test Step 2. Check for Active Diagnostic Codes A. Connect the Caterpillar Electronic Technician (ET) to the service tool connector. Refer to Troubleshooting, “Electronic Service Tools”. B. Turn the keyswitch to the ON position. C. Observe the active diagnostic code screen on Cat ET. Wait at least 15 seconds so that any diagnostic codes may become active.
Look for a 247-09 diagnostic code. Expected Result: No diagnostic codes are active. g01123351 Illustration 27 Results: J61/P61 terminals that are associated with the CAN data link OK No codes are active. (16) CAN shield (17) CAN data link + (18) CAN data link Repair: The problem may be intermittent. If the problem is intermittent, refer to Troubleshooting, “Electrical Connectors - Inspect”. C. Perform a 45 N (10 lb) pull test on each of the wires that are associated with the CAN data link. D. Check the allen head screw on each ECM connector for the proper torque. Refer to Troubleshooting, “Electrical Connectors - Inspect” for the correct torque values. STOP.
Not OK A 247-09 diagnostic code is active. Proceed to Test Step 3. Test Step 3. Verify the Proper Installation of the CAN Data Link E. Check the allen head screw on the customer connector for the proper torque. Refer to Troubleshooting, “Electrical Connectors - Inspect” for the correct torque value. A. Disconnect the J1939 display. B. Disconnect the P1 connector and measure the resistance between terminals P1-50 (CAN data link +) and P1-34 (CAN data link -). F. Check the wiring harnesses for abrasion, for corrosion and for pinch points. Expected Result: All connectors, pins and sockets are completely coupled and/or inserted.
The harness and wiring are free of corrosion, of abrasion and of pinch points. Expected Result: The resistance is between 57 and 63 Ohms. Results: Results: OK – The resistance is between 57 and 63 Ohms. Proceed to Test Step 6. OK The harness and the wiring appear to be OK. Proceed to Test Step 2. Not OK – The resistance is between 114 Ohms and 126 Ohms. A terminating resistor is missing.