PUSHROD 3198426 - Caterpillar

Illustration 1 g00836862
Typical schematic
Illustration 2 g01071904
P1 ECM connector (P1-30) Analog return (P1-36) 5 V analog supplyTest Step 1. Inspect Electrical Connectors and Wiring
Turn the keyswitch to the OFF position.
Thoroughly inspect the ECM connector J1/P1. Inspect all of the sensor connectors. Refer to Troubleshooting, "Inspecting Electrical Connectors" for details on inspecting connectors.
Perform a 45 N (10 lb) pull test on each of the wires in the ECM connector that are associated with the circuit.
Check the ECM connector (allen head screw) for the proper torque of 6.0 N m (55 lb in).
Check the customer connector (allen head screw) for the proper torque of 2.25 0.25 N m (20 2 lb in).
Check the harness and wiring for abrasion and for pinch points from the sensors back 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 wiring are OK. Proceed to Test Step 2.
Not OK - There is a problem in the connectors 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 2. Check for Active Diagnostic Codes
Connect the Caterpillar Electronic Technician (ET) to the service tool connector.
Turn the keyswitch to the ON position.
Monitor the active diagnostic code screen on Cat ET. Check and record any active diagnostic codes.Note: Wait at least 15 seconds in order for the diagnostic codes to become active.Expected Result:None of the following diagnostic codes are active:
262-03
262-04 Results:
OK - No diagnostic codes are active.Repair: The problem may have been related to a faulty connection in the harness. Carefully reinspect the connectors and wiring. Refer to Troubleshooting, "Inspecting Electrical Connectors".STOP
Not OK - A 262-03 diagnostic code is active. Proceed to Test Step 4.
Not OK - A 262-04 diagnostic code is active. Proceed to Test Step 3.Test Step 3. Disconnect the +5 V Pressure Sensors while you Monitor the Active Diagnostic Codes
Monitor the active diagnostic code screen on the electronic service tool. Check and record any active diagnostic codes.Note: Wait at least 15 seconds in order for the diagnostic codes to become active.
Disconnect the following sensors one at a time:
Aftercooler temperature sensor
Coolant temperature sensor
Atmospheric pressure sensor
Crankcase pressure sensor
Filtered engine oil pressure sensor
Unfiltered engine oil pressure sensor
Left turbocharger compressor inlet pressure sensor
Right turbocharger compressor inlet pressure sensor
Turbocharger compressor outlet pressure sensor
Air inlet temperature sensor
Wait for 15 seconds after each pressure sensor is disconnected. Check for an active diagnostic code on the electronic service tool.Expected Result:The 262-04 diagnostic code deactivates.Results:
OK - The 262-04 diagnostic code deactivates. The diagnostic code is not active after a specific sensor is disconnected.Repair: Reconnect the sensor that is suspected of causing the problem. If the problem returns after the reconnection of the sensor, disconnect the sensor. If the problem disappears after the disconnection of the sensor, replace the sensor. Reconnect all wires to the original configuration.