Overview
| CODE | REASON | EFFECT |
| Fault Code: 3566 PID: SPN: 5394 FMI: 4/4 LAMP: Amber SRT: |
Low signal voltage detected at the diesel exhaust fluid dosing valve.
|
Possible reduced engine performance. |
Circuit Description
The aftertreatment diesel exhaust fluid dosing valve is controlled by the ECM. When the engine control module (ECM) commands DEF dosing, the ECM sends a pulse width modulated (PWM) signal to the dosing valve, which opens the dosing valve and allows DEF to be sprayed into the exhaust stream.
Component Location
The aftertreatment diesel exhaust fluid dosing valve is installed in the exhaust system. It is mounted directly to the aftertreatment decomposition tube, before the selective catalytic reduction (SCR) catalyst. Installation position will vary, based on the aftertreatment architecture and the original equipment manufacturer (OEM).
Conditions for Running the Diagnostics
This diagnostic runs when the diesel exhaust fluid dosing valve is being commanded on.
Conditions for Setting the Fault Codes
The aftertreatment diesel exhaust fluid controller detected the diesel exhaust fluid dosing valve voltage was less than a calibratible value.
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.
Conditions for Clearing the Fault Code
- To validate the repair, perform the «Aftertreatment Diesel Exhaust Fluid Doser Pump Override Test» found under «ECM Diagnostic Tests» in the recommended Cummins® electronic service tool or equivalent.
- 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:
Short to ground in the diesel exhaust fluid dosing valve
Short to ground in the diesel exhaust fluid controller harness
Malfunctioning diesel exhaust fluid controller.
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
- Technical Service Bulletin is available
- Aftertreatment diesel exhaust fluid dosing valve resistance check
- Aftertreatment diesel exhaust fluid controller harness open circuit check
- Aftertreatment diesel exhaust fluid controller wiring harness short to ground
- Aftertreatment diesel exhaust fluid dosing valve SIGNAL or RETURN wire short-to-ground
- Aftertreatment diesel exhaust fluid dosing valve circuit pin to pin short
- Aftertreatment diesel exhaust fluid controller is malfunctioning
Solution: S00009673
Verification
Conditions
- Turn keyswitch OFF.
Specification
- Proceed to the Repair section if the Technical Service Bulletin is applicable.
Linked Solutions
- None
Repair
- Complete the action outlined in the Technical Service Bulletin.
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: S00003391
Verification
Conditions
- Turn keyswitch OFF.
- Disconnect the aftertreatment diesel exhaust fluid dosing valve from the aftertreatment diesel exhaust fluid controller wiring harness.
Action
- Inspect the pins and connectors for damage.
- Measure the resistance of the aftertreatment diesel exhaust fluid dosing valve.
- Refer to the circuit diagram or wiring diagram for connector pin identification.
Specification
- If the resistance is not within specification, then a malfunctioning aftertreatment diesel exhaust fluid dosing valve 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.
Solution: S00003192
Verification
Conditions
- Turn keyswitch OFF.
- Disconnect the aftertreatment diesel exhaust fluid controller harness 86-pin connector from the aftertreatment diesel exhaust fluid controller.
- Disconnect the aftertreatment diesel exhaust fluid dosing valve from the aftertreatment diesel exhaust fluid controller wiring harness.
Action
- Inspect the pins and connectors for damage.
- Measure the resistance between the aftertreatment diesel exhaust fluid dosing valve SIGNAL pin at the aftertreatment diesel exhaust fluid valve connector and the aftertreatment diesel exhaust fluid dosing valve SIGNAL pin of the aftertreatment diesel exhaust fluid controller harness 86-pin connector.
- Measure the resistance between the aftertreatment diesel exhaust fluid dosing valve RETURN pin at the aftertreatment diesel exhaust fluid valve connector and the aftertreatment diesel exhaust fluid dosing valve RETURN pin of the aftertreatment diesel exhaust fluid controller harness 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 the resistance is greater than the following specification: 10 Ω
Linked Solutions
- None
Repair
- 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: S00003194
Verification
Conditions
- Turn keyswitch ON.
- Disconnect the aftertreatment diesel exhaust fluid controller harness 86-pin connector from the aftertreatment diesel exhaust fluid controller.
- Disconnect the aftertreatment diesel exhaust fluid controller harness 53-pin connector from the aftertreatment diesel exhaust fluid controller.
Action
- Inspect the pins and connectors for damage.
- Measure the resistance between the aftertreatment diesel exhaust fluid dosing valve SIGNAL pin at the aftertreatment diesel exhaust fluid controller wiring harness 86-pin connector and ground.
- Measure the resistance between the aftertreatment diesel exhaust fluid dosing valve RETURN pin at the aftertreatment diesel exhaust fluid controller harness 86-pin connector and ground.
- Refer to the circuit diagram or wiring diagram for connector pin identification.
Specification
- If the resistance is less than 100k Ω, then a malfunctioning aftertreatment diesel exhaust fluid controller harness has been detected.
Linked Solutions
- None
Repair
- 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: S00003392
Verification
Conditions
- Turn keyswitch OFF.
- Disconnect the aftertreatment diesel exhaust fluid dosing valve from the aftertreatment diesel exhaust fluid controller wiring harness.
Action
- Inspect the pins and connectors for damage.
- Measure the resistance between the aftertreatment diesel exhaust fluid dosing valve SIGNAL pin and the metal case of the aftertreatment diesel exhaust fluid dosing valve.
- Measure the resistance between the aftertreatment diesel exhaust fluid dosing valve RETURN pin and the metal case of the aftertreatment diesel exhaust fluid dosing valve.
- Refer to the circuit diagram or wiring diagram for connector pin identification.
Specification
- If the resistance is less than 100k Ω, 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.
Solution: S00003189
Verification
Conditions
- Turn keyswitch OFF.
- Disconnect the aftertreatment diesel exhaust fluid controller harness 86-pin connector from the aftertreatment diesel exhaust fluid controller.
- Disconnect the aftertreatment diesel exhaust fluid dosing valve from the aftertreatment diesel exhaust fluid controller wiring harness.
Action
- Inspect the pins and connectors for damage.
- Measure the resistance between the aftertreatment diesel exhaust fluid dosing valve SIGNAL pin at the aftertreatment diesel exhaust fluid controller wiring harness 86-pin connector and all other pins in the connector.
- Measure the resistance between the aftertreatment diesel exhaust fluid dosing valve RETURN pin at the aftertreatment diesel exhaust fluid controller wiring harness 86-pin connector and all other pins in the connector.
- Refer to the circuit diagram or wiring diagram for connector pin identification.
Specification
- If the resistance is less than 100k Ω, then a malfunctioning aftertreatment diesel exhaust fluid controller harness has been detected.
Linked Solutions
- None
Repair
- 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: S00003236
Verification
Conditions
- Connect all components.
- 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.
- Verify all preceding solution verifications for this fault code have been performed.
Specification
- If the fault code is still active after all the preceding solution verifications have been performed, then a malfunctioning aftertreatment diesel exhaust fluid controller 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.