Overview
| CODE | REASON | EFFECT |
| Fault Code: 3572 PID: SPN: 4334 FMI: 4/4 LAMP: Amber SRT: |
Low signal voltage detected at the diesel exhaust fluid pressure sensor circuit.
|
Possible reduced engine performance. |
Circuit Description
The Engine Control Module (ECM) provides a 5 volt supply and a ground to the aftertreatment diesel exhaust fluid pressure sensor. The pressure sensor provides a signal to the ECM on the sensor signal circuit. This sensor signal voltage changes, based on the aftertreatment diesel exhaust fluid pressure supplied by the dosing unit. The ECM will detect a low signal voltage at low diesel exhaust fluid pressures, and a high signal voltage at high diesel exhaust fluid pressures.
Component Location
The aftertreatment diesel exhaust fluid pressure sensor is internal to the aftertreatment diesel exhaust fluid dosing unit and can not be serviced separately.
Conditions for Running the Diagnostics
This diagnostic runs continuously when the keyswitch is in the ON position or when the engine is running.
Conditions for Setting the Fault Codes
The Engine Control Module (ECM) detected the aftertreatment diesel exhaust fluid pressure sensor signal voltage was out of range low.
Action Taken When the Fault Code is Active
- The ECM illuminates the amber CHECK ENGINE lamp and/or the malfunction indicator lamp (MIL) immediately when the diagnostic runs and fails.
- Diesel exhaust fluid injection into the aftertreatment system is disabled.
Engine torque will be reduced if the engine is operated for an extended period of time with this fault active.
Conditions for Clearing the Fault Code
- To validate the repair, perform a key cycle, start the engine and let it idle for 1 minute.
- The fault code status displayed by the recommended Cummins® electronic service tool or equivalent will change to INACTIVE immediately after the diagnostic runs and passes.
- The ECM will turn off the amber CHECK ENGINE lamp immediately after the diagnostic runs and passes.
- For On-Board Diagnostics (OBD) engines, the ECM will extinguish the Malfunction Indicator Lamp (MIL) after three consecutive trips where the diagnostic runs and passes.
- The “Reset All Faults” command in the recommended Cummins® electronic service tool or equivalent can be used to clear active and inactive faults, as well as extinguish the MIL for OBD applications.
Shop Talk
Possible causes of this fault code include:
Signal wire shorted to ground
Malfunctioning aftertreatment diesel exhaust fluid controller
Malfunctioning aftertreatment diesel exhaust fluid controller harness.
Reference the appropriate OEM wiring diagram when troubleshooting circuits that utilize wiring supplied by the OEM.
For intermittent power supply and datalink communication issues with Aftertreatment Components, it is highly recommended that the OEM Power Distribution Center fuses and relays be thoroughly checked for loose, missing or intermittent connections.
Troubleshooting Summary
- Check for primary fault codes
- Aftertreatment diesel exhaust fluid dosing unit connector is malfunctioning
- Aftertreatment diesel exhaust fluid dosing unit voltage check
- Aftertreatment diesel exhaust fluid dosing unit voltage check
- Circuit Load Test
- Aftertreatment diesel exhaust fluid controller wiring harness circuit response
- Aftertreatment diesel exhaust fluid dosing unit circuit response
- Aftertreatment diesel exhaust fluid dosing unit is malfunctioning
Solution: S00001523
Verification
Conditions
- Turn keyswitch ON.
- Connect the recommended Cummins® electronic service tool or equivalent.
Action
- Use the recommended Cummins® electronic service tool or equivalent to read the fault codes.
Specification
Before troubleshooting this fault code, troubleshoot any fault code that is active or has more than one inactive count within the last 25 engine operating hours from the following list:
- Sensor supply 5: 1695, 1696
- Aftertreatment diesel exhaust fluid system: 3557
Linked Solutions
- None
Repair
- Perform a search on the appropriate fault codes.
Validation
- None
Solution: S00002928
Verification
Conditions
- Turn keyswitch OFF.
- Disconnect the aftertreatment diesel exhaust fluid dosing unit from the OEM wiring harness.
Action
- Inspect the pins and connectors for damage.
- Inspect all connections for corrosion or loose connections.
Specification
- If the aftertreatment diesel exhaust fluid dosing unit connector or the aftertreatment diesel exhaust fluid dosing unit wiring harness connector show signs of diesel exhaust fluid, then a malfunctioning aftertreatment diesel exhaust fluid dosing unit connector has been detected.
Linked Solutions
- None
Repair
Repair or replace only the components that were found to be out of specification.
- Replace aftertreatment diesel exhaust fluid dosing unit.
Validation
- Connect all components
- Connect the recommended Cummins® electronic service tool or equivalent.
- Disable the fault code.
- Operate the engine within the «Conditions for Clearing the Fault Code» found in the Overview section of the troubleshooting procedure.
- Verify that the fault code is no longer active.
- Check ECM Calibration Revision History
- Use the recommended Cummins® electronic service tool or equivalent to find the current ECM code and revision number in the ECM.
- Compare the ECM code and revision number in the ECM to the calibration revisions listed in the ECM Calibration Revision History Database for applicable changes related to this fault code.
- Refer to ECM Calibration Revision History Database.
Solution: S00002915
Verification
Conditions
- Turn keyswitch OFF.
- Disconnect the aftertreatment diesel exhaust fluid dosing unit from the OEM wiring harness.
Action
- Inspect the pins and connectors for damage.
- Measure the voltage between the aftertreatment diesel exhaust fluid pressure sensor SUPPLY pin and the aftertreatment diesel exhaust fluid pressure sensor RETURN pin at the aftertreatment diesel exhaust fluid dosing unit connector of the aftertreatment diesel exhaust fluid controller harness.
- Refer to the circuit diagram or wiring diagram for connector pin identification.
Specification
- Proceed to the next solution if voltage is within the following specification: 4.75 – 5.25 VDC
- Proceed to the Linked Solutions section if voltage is not within the following specification: 4.75 – 5.25 VDC
Linked Solutions
Click on the link below:
- Aftertreatment diesel exhaust fluid dosing unit voltage check
Repair
- No additional action is required for this solution.
Validation
- None
Solution: S00002895
Verification
Conditions
- Turn keyswitch OFF.
- Disconnect the 86-pin aftertreatment diesel exhaust fluid controller OEM wiring harness connector.
Action
- Inspect the pins and connectors for damage.
- Turn keyswitch ON.
- Measure the voltage between the aftertreatment diesel exhaust fluid pressure SUPPLY pin to the aftertreatment diesel exhaust fluid pressure RETURN pin at the aftertreatment diesel exhaust fluid controller 86 pin connector.
- Refer to the circuit diagram or wiring diagram for connector pin identification.
Specification
- A malfunctioning aftertreatment diesel exhaust fluid controller harness has been detected if voltage is within the following specification: 4.75 – 5.25 VDC
- A malfunctioning aftertreatment diesel exhaust fluid controller has been detected if voltage is not within the following specification: 4.75 – 5.25 VDC
Linked Solutions
- None
Repair
- Repair or replace aftertreatment diesel exhaust fluid controller harness.
Refer to OEM Service Manual
- Replace aftertreatment diesel exhaust fluid controller.
Validation
- Connect all components
- Connect the recommended Cummins® electronic service tool or equivalent.
- Disable the fault code.
- Operate the engine within the «Conditions for Clearing the Fault Code» found in the Overview section of the troubleshooting procedure.
- Verify that the fault code is no longer active.
- Check ECM Calibration Revision History
- Use the recommended Cummins® electronic service tool or equivalent to find the current ECM code and revision number in the ECM.
- Compare the ECM code and revision number in the ECM to the calibration revisions listed in the ECM Calibration Revision History Database for applicable changes related to this fault code.
- Refer to ECM Calibration Revision History Database.
Solution: S00011049
Verification
Conditions
- Turn keyswitch OFF.
- Disconnect all components on the wiring circuit being tested.
Action
This test is NOT for checking the J1939 data link (+) and (-) pins since it may cause damage to the J1939 smart devices or sensors.
This test is NOT for checking the OEM wiring harness since it may cause damage to OEM smart devices or sensors.
- Perform the Circuit Load Test for the circuit being tested.
- Refer to the circuit diagram or wiring diagram for connector pin identification.
Specification
- If the voltage drop is not within specification, then a malfunctioning wiring harness has been detected.
Linked Solutions
- None
Repair
Repair or replace only the components that were found to be out of specification.
- Repair or replace the engine wiring harness.
- Repair or replace the OEM wiring harness.
Validation
- Connect all components
- Connect the recommended Cummins® electronic service tool or equivalent.
- Disable the fault code.
- Operate the engine within the «Conditions for Clearing the Fault Code» found in the Overview section of the troubleshooting procedure.
- Verify that the fault code is no longer active.
- Check ECM Calibration Revision History
- Use the recommended Cummins® electronic service tool or equivalent to find the current ECM code and revision number in the ECM.
- Compare the ECM code and revision number in the ECM to the calibration revisions listed in the ECM Calibration Revision History Database for applicable changes related to this fault code.
- Refer to ECM Calibration Revision History Database.
Solution: S00003225
Verification
Conditions
- Turn keyswitch OFF.
- Wait for 90 seconds.
- Disconnect the aftertreatment diesel exhaust fluid controller harness 86-pin connector from the aftertreatment diesel exhaust fluid controller.
Action
- Inspect the pins and connectors for damage.
- Turn keyswitch ON.
- Connect the recommended Cummins® electronic service tool or equivalent.
- Wait 30 seconds before checking the circuit response.
- Use the recommended Cummins® electronic service tool or equivalent to read the fault codes.
Specification
- A malfunctioning aftertreatment diesel exhaust fluid controller has been detected if the following fault code did not become active with the aftertreatment diesel exhaust fluid controller harness 86-pin connector disconnected: 3571
- A malfunctioning aftertreatment diesel exhaust fluid controller harness has been detected if the following fault code became active with the aftertreatment diesel exhaust fluid controller harness 86-pin connector disconnected: 3571
Linked Solutions
- None
Repair
Repair or replace only the components that were found to be out of specification.
- Replace aftertreatment diesel exhaust fluid controller.
- Repair or replace aftertreatment diesel exhaust fluid controller harness.
Refer to OEM Service Manual
Validation
- Connect all components
- Connect the recommended Cummins® electronic service tool or equivalent.
- Disable the fault code.
- Operate the engine within the «Conditions for Clearing the Fault Code» found in the Overview section of the troubleshooting procedure.
- Verify that the fault code is no longer active.
- Check ECM Calibration Revision History
- Use the recommended Cummins® electronic service tool or equivalent to find the current ECM code and revision number in the ECM.
- Compare the ECM code and revision number in the ECM to the calibration revisions listed in the ECM Calibration Revision History Database for applicable changes related to this fault code.
- Refer to ECM Calibration Revision History Database.
Solution: S00002927
Verification
Conditions
- Turn keyswitch OFF.
- Disconnect the aftertreatment diesel exhaust fluid dosing unit from the aftertreatment diesel exhaust fluid controller wiring harness.
- Turn keyswitch ON.
- Connect the recommended Cummins® electronic service tool or equivalent.
Action
- Inspect the pins and connectors for damage.
- Wait 30 seconds before checking the circuit response.
- Use the recommended Cummins® electronic service tool or equivalent to read the fault codes.
- Refer to the circuit diagram or wiring diagram for connector pin identification.
Specification
- A malfunctioning aftertreatment diesel exhaust fluid dosing unit has been detected if the following fault code became active with the aftertreatment diesel exhaust fluid dosing unit disconnected: 3571
Linked Solutions
- None
Validation
- Connect all components
- Connect the recommended Cummins® electronic service tool or equivalent.
- Disable the fault code.
- Operate the engine within the «Conditions for Clearing the Fault Code» found in the Overview section of the troubleshooting procedure.
- Verify that the fault code is no longer active.
- Check ECM Calibration Revision History
- Use the recommended Cummins® electronic service tool or equivalent to find the current ECM code and revision number in the ECM.
- Compare the ECM code and revision number in the ECM to the calibration revisions listed in the ECM Calibration Revision History Database for applicable changes related to this fault code.
- Refer to ECM Calibration Revision History Database.
Solution: S00001431
Verification
Conditions
- None
Action
- Verify all preceding solution verifications for this fault code have been performed.
Specification
- If the fault code is still active or inactive with more than one count within the last 25 engine hours and all the preceding solution verifications have been performed, then a malfunctioning aftertreatment diesel exhaust fluid dosing unit has been detected.
Linked Solutions
- None
Validation
- Connect all components
- Connect the recommended Cummins® electronic service tool or equivalent.
- Disable the fault code.
- Operate the engine within the «Conditions for Clearing the Fault Code» found in the Overview section of the troubleshooting procedure.
- Verify that the fault code is no longer active.
- Check ECM Calibration Revision History
- Use the recommended Cummins® electronic service tool or equivalent to find the current ECM code and revision number in the ECM.
- Compare the ECM code and revision number in the ECM to the calibration revisions listed in the ECM Calibration Revision History Database for applicable changes related to this fault code.
- Refer to ECM Calibration Revision History Database.
If all steps have been completed and no root cause has been identified, then follow the technical escalation process.