SHAFT 1U3516 - Caterpillar

Probable Causes
Diagnostic codes
Battery power or ground
Aftermarket engine protection devices
Fuel supply
Engine speed/timing sensors
Low injection actuation pressure
Engine Control Module (ECM) or personality moduleNote: Shut down the engine before attempting to troubleshoot the problem.Recommended Actions
Diagnostic Codes
Connect Caterpillar Electronic Technician (ET) to the data link connector.
Check for active diagnostic codes. Note: Certain diagnostic codes may cause the engine to shutdown. Troubleshoot all diagnostic codes before continuing with this procedure.Battery Power or Ground
Ensure that the following connectors have been installed correctly:
ECM connectors (J1/P1 and J2/P2)
Injector connector (J300/P300)
Primary engine speed/timing connector (J401/P401)
Secondary engine speed/timing connector (J402/P402)
Check the power connections for the ECM and for the ground connections for the ECM. If a problem is suspected, wire a bypass. Refer to Troubleshooting, "Ignition Key Switch Circuit and Battery Supply Circuit - Test".
If the problem occurs only after engine warm-up and the problem disappears after the engine cooldown, the circuit breakers may be tripping because of the heat. Check the circuit breakers on the vehicle in order to determine if the circuit breakers reset automatically. Aftermarket Engine Protection Devices
Check aftermarket engine protection devices. These devices usually interrupt power to the ECM and the ECM will not communicate with Cat ET.
Check for the correct installation of the aftermarket engine protection device.
Check for the correct operation of the aftermarket engine protection device.
Verify that the ECM is receiving battery voltage. Fuel Supply
Monitor the exhaust for smoke while the engine is being cranked. If no smoke is present, there may be a problem with the fuel quality or there may be a problem with the fuel supply.
Check the fuel quality. Refer to , SEBU6385, "Caterpillar On-Highway Diesel Truck Engine Fluid Recommendations".
Check the fuel pressure. Refer to Testing and Adjusting, "Fuel System".
Ensure that the fuel system has been primed. Refer to Testing and Adjusting, "Fuel System".
Check for fuel supply lines that are restricted.
Check the fuel filters.
If the temperature is below 0 °C (32 °F), check for solidified fuel (wax). Engine Speed/Timing Sensors
Check the engine speed/timing sensors.Refer to Troubleshooting, "Engine Speed/Timing Circuit - Test".Low Injection Actuation Pressure
Check the engine oil level. Engine oil is used to activate the high pressure hydraulic pump.
Ensure that the engine oil meets the Caterpillar recommendations of the engine manufacturer. Refer to , SEBU6385, "Caterpillar On-Highway Diesel Truck Engine Fluid Recommendations".
Check the injection actuation pressure. Refer to Troubleshooting, "Injection Actuation Pressure -Test". ECM or Personality Module
Check the ECM or the personality module.Refer to Troubleshooting, "ECM Memory - Test".