SWITCH AS-PRESSURE 3T4446 - Caterpillar

Table 1
Diagnostic Trouble Codes
CDL Code J1939 Code Code Description
(code descriptions may vary) Comments
100-13 100-13 Engine Oil Pressure Sensor : Out of Calibration During key on, the signal voltage from the engine oil pressure sensor indicated an engine oil pressure greater than +/- 54 kPa (8 psi) from the atmospheric pressure sensor.
Reference sensor : Atmospheric Pressure Sensor
274-13 108-13 Atmospheric Pressure Sensor : Out of Calibration During key on, the signal voltage from the atmospheric pressure sensor indicated an atmospheric pressure other than 0 kPa (0 psi).
This sensor is used as a reference sensor
460-13 411-13 Fuel Pressure Sensor - After Fuel Filter : Out of Calibration During key on, the signal voltage from the fuel outlet pressure sensor (after secondary fuel filter) indicated a pressure other than 0 kPa (0 psi) .
This sensor is used as a reference sensor
1785-13 3251-13 Intake Manifold Pressure Sensor : Out of Calibration During key on, the signal voltage from the Intake Manifold pressure sensor indicated an Intake Manifold pressure greater than +/- 18 kPa (3 psi) from the Atmospheric Pressure sensor.
Reference sensor : Atmospheric Pressure Sensor
Table 2
Troubleshooting Test Steps Values Results
1. Check for Diagnostic Trouble Codes
The engine coolant temperature must be greater than 0° C (32° F) before beginning this procedure.
A. Establish communication between Caterpillar Electronic Technician (ET) and the Electronic Control Module (ECM) . Refer to Troubleshooting, "Electronic Service Tools", if necessary.
B. Download the "Warranty Report" from the engine ECM before performing any troubleshooting or clearing diagnostic trouble codes.
C. Wait at least 30 seconds in order for the diagnostic codes to become active.
Look for an active -13 code or for a logged -13 code.
Diagnostic Trouble Codes
Result: There is an active or there is a logged -13 code.
Proceed to Test Step 2.
2. Check for Debris
A. Turn the keyswitch to the OFF position.
B. Check the suspect sensor for debris.
C. If applicable, check the reference sensor for debris.
D. Check the sensor measurement port for blockage by debris.
E. If debris is found, clear the debris from the measurement port and replace the suspect sensor.
F. Turn the keyswitch to the ON position.
G. Check for -13 codes. Wait at least 30 seconds in order for the diagnostic codes to become active.
Debris
Result: The sensor measurement port is not blocked by debris.
Proceed to Test Step 3.
Result: A -13 code is not present, return the unit to service.
Result: A -13 code is present, replace the suspect sensor. Verify that the problem is resolved.
Result: If only a 460-13 or 411-13 code is present, replace the reference sensor. Verify that the problem is resolved.
Result: If more than one -13 code is present and the codes have a reference sensor, replace the reference sensor. Verify that the problem is resolved.
3. Inspect the Suspect Sensor Connector
A. Turn the keyswitch to the OFF position.
Inspect the suspect sensor connector for moisture and/or corrosion.
Moisture
Result: The suspect sensor connector has moisture and/or corrosion.
Proceed to Test Step 4.
Result: The suspect sensor connector does not have moisture and/or corrosion.
Proceed to Test Step 5.
4. Remove any moisture and/or corrosion
A. Disconnect the suspect sensor