Overview
| CODE | REASON | EFFECT |
| Fault Code: 3571 PID: SPN: 4334 FMI: 3/3 LAMP: Amber SRT: |
High signal voltage detected at the aftertreatment 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 valve 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 high.
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.
The engine speed may be limited to engine idle speed.
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 sensor supply or battery voltage.
- Malfunctioning or damaged aftertreatment diesel exhaust fluid pressure sensor.
- 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 valve voltage check
- Aftertreatment diesel exhaust fluid dosing valve circuit check
- Aftertreatment diesel exhaust fluid dosing valve pressure sensor circuit response
- Aftertreatment diesel exhaust fluid pressure sensor OEM wiring harness pin to pin short
- Aftertreatment diesel exhaust fluid dosing valve is malfunctioning
Solution: S00000854
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
Linked Solutions
- None
Repair
- Perform a search on the appropriate fault codes.
Validation
- None
Solution: S00011474
Verification
Conditions
- Turn keyswitch OFF.
- Disconnect the aftertreatment 1 diesel exhaust fluid dosing valve from the OEM wiring harness.
Action
- Inspect the pins and connectors for damage.
- Turn keyswitch ON.
- Measure the voltage from the aftertreatment 1 diesel exhaust fluid pressure +5 volt SUPPLY pin to the aftertreatment 1 diesel exhaust fluid pressure RETURN pin at the dosing valve connector of the OEM wiring harness.
- Refer to the circuit diagram or wiring diagram for connector pin identification.
Specification
- Proceed to the Linked Solutions section if voltage is not within the following specification: 4.75 – 5.25 VDC
Repair
- No additional action is required for this solution.
Validation
- None
Solution: S00011475
Verification
Conditions
- Turn keyswitch OFF.
- Disconnect the aftertreatment 1 diesel exhaust fluid dosing valve from the OEM wiring harness.
- Disconnect the OEM wiring harness connector from the ECM.
Action
- Inspect the pins and connectors for damage.
- Measure the resistance between the aftertreatment 1 diesel exhaust fluid pressure sensor RETURN pin in the OEM wiring harness ECM connector and the aftertreatment 1 diesel exhaust fluid pressure sensor RETURN pin in the OEM wiring harness aftertreatment 1 diesel exhaust fluid dosing valve connector.
- Diagnostic circuit art is available.
Refer to Service Bulletin 6497140
- Measure the resistance between the aftertreatment 1 diesel exhaust fluid pressure sensor SUPPLY pin in the OEM wiring harness ECM connector and the aftertreatment 1 diesel exhaust fluid pressure sensor SUPPLY pin in the OEM wiring harness aftertreatment 1 diesel exhaust fluid dosing valve connector.
- Diagnostic circuit art is available.
Refer to Service Bulletin 6497142
- Measure the resistance between the aftertreatment 1 diesel exhaust fluid pressure sensor SIGNAL pin in the OEM wiring harness ECM connector and the aftertreatment 1 diesel exhaust fluid pressure sensor SIGNAL pin in the OEM wiring harness aftertreatment 1 diesel exhaust fluid dosing valve connector.
- Diagnostic circuit art is available.
Refer to Service Bulletin 6497141
- Refer to the circuit diagram or wiring diagram for connector pin identification.
Specification
- A malfunctioning OEM wiring harness has been detected if the resistance is greater than the following specification: 10 Ω
- A malfunctioning ECM has been detected if the resistance is less than the following specification: 10 Ω
Linked Solutions
- None
Repair
Repair or replace only the components that were found to be out of specification.
- Repair or replace the OEM wiring harness.
- Replace the ECM.
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: S00000595
Verification
Conditions
- Turn keyswitch OFF.
- Disconnect the aftertreatment diesel exhaust fluid dosing valve from the OEM wiring harness.
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 pressure sensor has been detected if the following fault code became active with the aftertreatment diesel exhaust fluid dosing valve disconnected: 3572
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: S00011471
Verification
Conditions
- Turn keyswitch OFF.
- Disconnect the OEM wiring harness connector from the ECM.
- Disconnect all components on the wiring circuit being tested.
Action
- Inspect the pins and connectors for damage.
- Measure the resistance between the aftertreatment diesel exhaust fluid pressure sensor SUPPLY pin in the OEM wiring harness ECM connector and all other pins in that connector.
- Diagnostic circuit art is available.
Refer to Service Bulletin 6497107
- Measure the resistance between the aftertreatment diesel exhaust fluid pressure sensor RETURN pin in the OEM wiring harness ECM connector and all other pins in that connector.
- Diagnostic circuit art is available.
Refer to Service Bulletin 6497144
- Measure the resistance between the aftertreatment diesel exhaust fluid pressure sensor SIGNAL pin in the OEM wiring harness ECM connector and all other pins in that connector.
- Diagnostic circuit art is available.
Refer to Service Bulletin 6497145
- Refer to the circuit diagram or wiring diagram for connector pin identification.
Specification
- A malfunctioning OEM wiring harness has been detected if the resistance is less than the following specification: 100k Ω
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: S00010758
Verification
Conditions
- Turn keyswitch OFF.
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 proceed to the Repair section.
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.