3412E Engine for Caterpillar Built Machines Pressure Sensor

Pressure Sensor - Calibrate

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3412E Engine for Caterpillar Built Machines Diagnostic Trouble Code List

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Use this procedure to troubleshoot a problem with a pressure sensor calibration or use this procedure if any one of the diagnostic codes in Table 1 is active or easily repeated.

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Table 1
Diagnostic Codes Table
Code and Description	Conditions which Generate this Code	System Response
94-13 Fuel Delivery Pressure Sensor calibration required	The fuel pressure sensor has never been calibrated. The fuel pressure is less than 35 kPa (5.1 psi) or the fuel pressure greater than 130 kPa (18.9 psi) during an attempt at calibration. The fuel pressure fluctuates more than 25 kPa (3.6 psi) or the fuel pressure differs from atmospheric pressure more than 27 kPa (3.9 psi) during an attempt at calibration. There are active diagnostic codes for the fuel pressure sensor or the atmospheric pressure sensor during an attempt at calibration.	The code is logged. During a manual calibration, the pressure offset value is set to 0 kPa (0 psi). During an automatic calibration, the pressure offset value is set to the previous calibration value.
100-13 Engine Oil Pressure Sensor calibration required	The engine oil pressure sensor has never been calibrated. The engine oil pressure is less than 35 kPa (5.1 psi) or the engine oil pressure greater than 130 kPa (18.9 psi) during an attempt at calibration. The engine oil pressure fluctuates more than 25 kPa (3.6 psi) or the engine oil pressure differs from atmospheric pressure more than 27 kPa (3.9 psi) during an attempt at calibration. There are active diagnostic codes for the engine oil pressure sensor or the atmospheric pressure sensor during an attempt at calibration.	The code is logged. During a manual calibration, the pressure offset value is set to 0 kPa (0 psi). During an automatic calibration, the pressure offset value is set to the previous calibration value.
273-13 Turbocharger Outlet Pressure Sensor calibration required	The turbocharger outlet pressure sensor has never been calibrated. The turbocharger outlet pressure is less than 35 kPa (5.1 psi) or the turbocharger outlet pressure greater than 122 kPa (17.7 psi) during an attempt at calibration. The turbocharger outlet pressure fluctuates more than 10 kPa (1.5 psi) or the turbocharger outlet pressure differs from atmospheric pressure more than 15 kPa (2.2 psi) during an attempt at calibration. There are active diagnostic codes for the turbocharger outlet pressure sensor during an attempt at calibration.
274-13 Atmospheric Pressure Sensor calibration required	The atmospheric pressure sensor has never been calibrated. The atmospheric pressure is less than 45 kPa (6.5 psi) or the atmospheric pressure greater than 111 kPa (16.1 psi) during an attempt at calibration. The atmospheric pressure fluctuates more than 25 kPa (3.6 psi) during an attempt at calibration. There are active diagnostic codes for the atmospheric pressure sensor during an attempt at calibration.

The Electronic Control Module (ECM) attempts to perform an automatic calibration of all pressure sensors whenever the ECM is powered and the engine has been off for at least five seconds. Cranking the engine during the first five seconds causes the ECM to abort the calibration attempt.

During an automatic pressure sensor calibration, the ECM checks all pressure sensors against an acceptable range. If any pressure sensor reading is outside the acceptable range, the previous calibration value is used. The ECM then calibrates all pressure sensors against the atmospheric pressure sensor.

A pressure sensor calibration will not be successful if there are active sensor diagnostic codes with an FMI of 03 and/or 04. A pressure sensor calibration will not be successful if one of the following conditions exist:

The pressure reading is outside of an acceptable range.
The pressure reading varies significantly during calibration.

Check for active diagnostic codes and/or for logged diagnostic codes. Troubleshoot any diagnostic codes that are present before continuing with this procedure.

Perform a Manual Calibration of the Sensors.
1. Connect the AVSpare Electronic Technician (ET) to the data link connector.
1. Select "Calibrations" from the "Service" menu on Cat ET. Select the "Pressure Sensor Calibration" from the "Calibrations" menu. The ECM will perform a pressure sensor calibration when this screen is entered.

Investigate a Failed Manual Calibration.
1. Check if any pressure sensors caused a 13 diagnostic code which indicates that a calibration is required.
1. Verify that the correct sensor(s) has been installed.
1. Check Cat ET for the reading of the pressure sensor(s).
1. Verify the following pressure sensor readings:
  - The turbocharger outlet pressure does not differ from atmospheric pressure by more than 15 kPa (2.0 psi).
  - The engine oil pressure does not differ from atmospheric pressure by more than 27 kPa (4.0 psi).
  - The atmospheric pressure does not differ from actual barometric pressure by more than 5 kPa (0.7 psi).