92 RENR5042-02 Troubleshooting Section 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. Results: Active 03 code An 03 diagnostic code is active. Proceed to Test Step 3. 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. Active 04 code An 04 diagnostic code is active. Proceed to Test Step 5. Active 10 code A 10 diagnostic code is active. Proceed to Test Step 4. F.
Check the harness and the wiring for abrasion and for pinch points from each sensor back to the ECM. No active codes – None of the above codes are active. Expected Result: Repair: If any of the above codes are logged and the engine is not running properly, refer to Troubleshooting, “Troubleshooting Without a Diagnostic Code”. All of the connectors, pins and sockets are completely coupled and/or inserted and the harness and wiring are free of corrosion, of abrasion and of pinch points. If the engine is running properly at this time, there may be an intermittent problem in a harness that is causing the codes to be logged. Refer to Troubleshooting, “Electrical Connectors - Inspect”. Results:
OK – The harness and connectors appear to be OK. Proceed to Test Step 2. STOP. Not OK The connectors and/or wiring are not OK. Test Step 3. Check the Voltage on the +5 V Supply Wire Repair: Repair the wiring and/or the connectors. 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 repair eliminates the problem. A. Turn the keyswitch to the OFF position. B. Disconnect the harness connectors for the following sensors: STOP. Injection actuation pressure sensor J500/P500 Test Step 2. Check for Active Diagnostic Codes Boost pressure sensor J200/P200 A.
Connect the Caterpillar Electronic Technician (ET) to the service tool connector. Refer to Troubleshooting, “Electronic Service Tools”. Atmospheric pressure sensor J203/P203 Fuel pressure sensor J209/P209 Engine oil pressure sensor J201/P201 B. Turn the keyswitch to the ON position. Auxiliary pressure sensor J220/P220 (if equipped) C. Observe the “Active Diagnostic” screen on Cat ET. Wait at least 15 seconds so that any codes may become active. Look for these codes: C. Turn the keyswitch to the ON position. 262-03 Note: Be sure to wiggle the harness during the following measurements in order to reveal an intermittent condition. 262-04 100-10 D.
Measure the voltage between terminals A and B at each sensor connector on the engine harness. 102-10 Expected Result: Expected Result: One of the above codes is active. Each voltage measurement is 5.0 ± 0.2 VDC.