BRACKET 4P9481 - Caterpillar

Illustration 3 g00765339
P2 ECM connector
Place the engine control in the OFF/RESET mode.
Thoroughly inspect the J2/P2 ECM connector, the suspect sensor connector, and any other connectors in the circuit. Refer to Troubleshooting, "Electrical Connectors - Inspect" for details.
Perform a 45 N (10 lb) pull test on each of the wires in the sensor connector and the ECM connector that are associated with the active diagnostic code.
Verify that the latch tab of the connector is properly latched.
Check the ECM connector (allen head screw) for the proper torque. Refer to Troubleshooting, "Electrical Connectors - Inspect" for details.
Check the harness and wiring for abrasions and for pinch points from the sensor to the ECM.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.Results:
OK - The harness and/or wiring are OK. Proceed to Test Step 3.
Not OK - There is a problem with the harness and/or wiring.Repair: Repair the connectors or wiring and/or replace the connectors or wiring. 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.STOPTest Step 3. Verify that the Diagnostic Code is Still Active
Place the engine control in the ON mode. Wait at least 15 seconds for activation of the diagnostic code.
Access the "Active Diagnostic Codes" screen on Cat ET and check for active diagnostic codes.
Determine if the problem is related to an open circuit diagnostic code 03 or to a short circuit diagnostic code 04.Expected Result:No active codes are present.Results:
OK - No active codes are present. The problem seems to be resolved.Repair: Carefully reinspect the connectors and wiring. Refer to Troubleshooting, "Electrical Connectors - Inspect" for additional information.STOP
Not OK - A short circuit diagnostic code 04 is active at this time. Proceed to Test Step 4.
Not OK - An open circuit diagnostic code 03 is active at this time. Proceed to Test Step 5.Test Step 4. Disconnect the Sensor in Order to Create an Open Circuit
Place the engine control in the OFF/RESET mode.
Disconnect the connector to the sensor with the short circuit diagnostic code 04.
Place the engine control in the ON mode. Wait at least 15 seconds for activation of the diagnostic codes.
Access the "Active Diagnostic Codes" screen on Cat ET and check for an active open circuit diagnostic code 03 for the suspect sensor.
Place the engine control in the OFF/RESET mode.Expected Result:An open circuit diagnostic code 03 is now active for the disconnected sensor.Results:
OK - A short circuit diagnostic code 04 was active before disconnecting the sensor. An open circuit diagnostic code 03 became active after disconnecting the sensor.Repair: Temporarily connect a new sensor to the harness, but do not install the new sensor in the engine. Check for a short circuit diagnostic code 04 while the new sensor is connected. If the short circuit diagnostic code 04 is not present, permanently install a new sensor. Clear any logged diagnostic codes.Verify that the repair eliminates the problem.STOP
Not OK -