C4.4 and C6.6 Engines Caterpillar

Sensor Calibration Required - Test

Usage:

C4.4 448

The Electronic Control Module (ECM) performs calibrations of pressure sensors automatically. Use this procedure if the diagnostic code in Table 1 is active or easily repeated.

Show/hide table

Table 1
Diagnostic Codes Table for Sensor Calibration
J1939 Code	CDL Code	Code Description (code descriptions may vary)	Comments
3358-13	3385-13	Engine Exhaust Gas Recirculation Inlet Pressure : Out of Calibration	The ECM detects the following conditions: The offset between the NRS inlet pressure and the barometric pressure is outside the acceptable range during initialization check. The offset between the NRS inlet pressure and the barometric pressure is outside the acceptable range during sensor calibration when the engine is not running. The warning lamp will come on and the engine will derate. The code is logged.
3563-13	1785-13	Engine Intake Manifold #1 Absolute Pressure : Out of Calibration	The ECM detects the following conditions: The offset between the intake manifold air pressure and the barometric pressure is outside the acceptable range during initialization check. The offset between the intake manifold air pressure and the barometric pressure is outside the acceptable range during sensor calibration with the engine not running. The warning lamp will come on and the engine will derate. The code is logged.
5019-13	3511-13	EGR Outlet Pressure : Out of Calibration	The ECM detects the following conditions: The offset between the NRS outlet pressure and the barometric pressure is outside the acceptable range during initialization check. The offset between the NRS outlet pressure and the barometric pressure is outside the acceptable range during sensor calibration with the engine not running. The warning lamp will come on and the engine will derate. The code is logged.

The Electronic Control Module (ECM) checks the signals from certain pressure sensors 12 seconds after the keyswitch is turned to the OFF position. The key must remain in the OFF position for a further 2 seconds in order for the ECM to check the signals from the sensors. During this time, the ECM compares the signal from the barometric pressure sensor with the signal from the following pressure sensors:

Intake manifold air pressure
NRS inlet pressure
NRS outlet pressure

The sensor signal must be within the specified range of the signal from the reference pressure sensor. If a sensor signal is out of the range, the corresponding fault code becomes active.

The offset value is stored in the engine ECM. If the requirements are not met for the offset to be checked against the barometric pressure sensor, the stored value is used.

Show/hide table

Table 2
Troubleshooting Test Steps	Values	Results
1. Check For Active Diagnostic Codes A. Turn the keyswitch to the OFF position. B. Connect the electronic service tool to the diagnostic connector. C. Turn the keyswitch to the ON position. Download the "Product Summary Report" from the engine ECM before performing any troubleshooting or clearing diagnostic trouble codes. D. Use the electronic service tool to check that coolant temperature, intake manifold air temperature, and NRS temperature are all at least 5° C (41° F). Note: Wait at least 10 seconds in order for the diagnostic codes to become active. E. Use the electronic service tool to monitor active diagnostic codes or recently logged diagnostic codes. Look for an active or logged -3 or -4 codes for the pressure sensor or the barometric pressure sensor. F. Use the electronic service tool to monitor active diagnostic codes or recently logged diagnostic codes. Look for an active or logged -13 code for a pressure sensor or the barometric pressure sensor. G. Turn the keyswitch to the OFF position.	Diagnostic codes	Result: There are no active diagnostic codes for the pressure sensors. Repair: If there are logged diagnostic codes for the intake manifold pressure sensor, the fault may be intermittent. Refer to Troubleshooting, "Electrical Connectors - Inspect" to identify intermittent faults. Result: One or more of the temperature sensors is reading less than 5° C (41° F). Proceed to Test Step 2. Result: There is an active -3 or -4 diagnostic code for a pressure sensor or the barometric pressure sensor. Repair: Troubleshoot these codes before continuing with this procedure. Result: 3358-13 (3385-13) and 3563-13 (1785-13) diagnostic codes are active. Proceed to Test Step 3. Result: There is an active -13 diagnostic code for only one sensor. Proceed to Test Step 4.
2. Ensure that the Systems are Fully Thawed A. Move the machine into an environment where the ambient temperature is greater than 5° C (41° F) during any troubleshooting. B. If there is a risk of ice formation on a sensor or sensor pipes, run engine until the coolant temperature exceeds 65° C (149° F) for 20 minutes. C. Turn the keyswitch to the OFF position. Wait for at least 20 seconds. The electronic service tool will disconnect. D. Turn the keyswitch to the ON position. E. Verify that coolant temperature, intake manifold air temperature, and NRS temperature are all now at least 5° C (41° F). F. Check for active -13 diagnostic codes. G. Check that the suspect sensor is installed correctly. Check that the suspect sensor is fully seated into the engine.	Diagnostic codes	Result: There are no active -13 codes. Repair: The fault was caused by ice in the system that has now been thawed. Return the unit to service Result: Both 3358-13 (3385-13) and 3563-13 (1785-13) codes are active or logged. Proceed to Test Step 3. Result: A single -13 code is active or logged. Proceed to Test Step 4.
3. Check the Barometric Pressure Sensor A. Turn the keyswitch to the OFF position. B. Install a new barometric pressure sensor. C. Turn the keyswitch to the ON position. Do not start the engine. Note: Wait at least 10 seconds in order for the diagnostic codes to become active. D. Monitor the status parameter for the suspect sensor on the electronic service tool.	Barometric pressure sensor fault	Result: There is no active -13 code. The fault was caused by a faulty barometric pressure sensor. Use the electronic service tool to clear all logged codes. Return the unit to service. Result: Either a 3358-13 (3385-13) or 3563-13 (1785-13) code is active. Proceed to Test Step 4.
4. Check the Suspect Pressure Sensor A. Turn the keyswitch to the OFF position. B. Disconnect the connector for the suspect sensor and remove the sensor from the engine. C. Check the sensor for a blockage. D. Temporarily reconnect the sensor to the harness. Do not install the sensor on the engine. E. Turn the keyswitch to the ON position. Do not start the engine. F. Check for an active -13 diagnostic code for the suspect sensor.	Suspect sensor fault	Result: There is an active -13 code or the sensor is blocked Temporarily connect a new sensor to the harness. Use the electronic service tool to confirm that the repair eliminates the fault. If the fault is eliminated, permanently install the new sensor. Refer to Disassembly & Assembly for the correct installation procedure. If the fault is still present, contact the Dealer Solutions Network (DSN). Result: There is no active -13 code. Check that the sensor pipe is free of blockages or restrictions. If necessary, remove the pipe and clear any blockage with an air line that is set at a maximum pressure of 200 kPa (29 psi). If the blockage is cleared, reinstall the pipe. If the blockage cannot be cleared or there is a restriction, replace the pipe. Install the sensor. Refer to Disassembly & Assembly for the correct installation procedure. Turn the keyswitch to the ON position. Run the engine at idle speed for 5 minutes. Turn the keyswitch to the OFF position. Ensure that the ECM is fully powered-down. Turn the keyswitch to the ON position. Do not start the engine. Wait for 10 seconds. Confirm that the code is not active. Use the electronic service tool to clear all logged codes. If the fault is still present, contact the Dealer Solutions Network (DSN).