Overview
| CODE | REASON | EFFECT |
| Fault Code: 3576 PID: SPN: 3363 FMI: 5/5 LAMP: Amber SRT: |
Open circuit detected at the aftertreatment diesel exhaust fluid tank heater control valve.
|
Possible reduced engine performance. |
Circuit Description
The aftertreatment diesel exhaust fluid tank heater keeps the diesel exhaust fluid from freezing in the diesel exhaust fluid tank. The tank heater consists of an electrically powered tank heater control valve which controls the flow of engine coolant to a heating coil inside the diesel exhaust fluid tank. The tank heater control valve opens to allow coolant to flow to the heating coil when heating is commanded, and closes when heating is no longer required.
Component Location
The diesel exhaust fluid tank heater control valve is located near the diesel exhaust fluid tank. Specific location will vary depending on the OEM. The tank heating coil is internal to the diesel exhaust fluid tank.
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 diesel exhaust fluid controller detected the diesel exhaust fluid tank heater circuit was open.
Action Taken When the Fault Code is Active
- The ECM illuminates the amber CHECK ENGINE lamp and/or malfunction indicator lamp (MIL) after the diagnostic fails on two consecutive trips.
Diesel exhaust fluid tank heating will be disabled.
Engine torque will be reduced if the engine is operated for an extended period of time with this fault active.
Vehicle speed will be limited to 8 km [5 mi] per hour after extended engine operation with the fault code 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 four 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:
An open circuit in the OEM harness
Malfunctioning aftertreatment diesel exhaust fluid tank heater control valve
Malfunctioning aftertreatment 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
Solution: S00000759
Verification
Conditions
- Turn keyswitch OFF.
- Disconnect the aftertreatment diesel exhaust fluid controller wiring harness 86-pin connector from the aftertreatment diesel exhaust fluid controller.
- Disconnect the aftertreatment diesel exhaust fluid tank heater control valve from the OEM wiring harness.
Action
- Inspect the pins and connectors for damage.
- Measure the resistance between the aftertreatment diesel exhaust fluid tank heater control valve RETURN pin at the aftertreatment diesel exhaust fluid tank heater control valve harness connector and the aftertreatment diesel exhaust fluid tank heater control valve RETURN pin of the aftertreatment diesel exhaust fluid controller harness 86-pin connector.
- Measure the resistance between the aftertreatment diesel exhaust fluid tank heater control valve SIGNAL pin at the aftertreatment diesel exhaust fluid tank heater control valve harness connector and the aftertreatment diesel exhaust fluid tank heater control valve SIGNAL 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 wiring harness.
Validation
- Connect all components
- Connect the recommended Cummins® electronic service tool or equivalent.
- Disable 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: S00005319
Verification
Conditions
- Turn keyswitch OFF.
- Disconnect the aftertreatment diesel exhaust fluid controller wiring harness 86-pin connector from the aftertreatment diesel exhaust fluid controller.
- Disconnect the aftertreatment diesel exhaust fluid tank heater control valve from the OEM wiring harness.
Action
- Inspect the pins and connectors for damage.
- Measure the resistance between the aftertreatment diesel exhaust fluid tank heater control valve SIGNAL pin at the aftertreatment diesel exhaust fluid controller wiring harness 86-pin connector and all other pins in that connector.
- Measure the resistance between the aftertreatment diesel exhaust fluid tank heater control valve RETURN pin at the aftertreatment diesel exhaust fluid controller wiring harness 86-pin connector and all other pins in that connector.
- Refer to the circuit diagram or wiring diagram for connector pin identification.
Specification
- A malfunctioning aftertreatment diesel exhaust fluid controller wiring harness has been detected if the resistance is less than the following specification: 100k Ω
Linked Solutions
- None
Repair
- Repair or replace aftertreatment diesel exhaust fluid controller wiring harness.
Validation
- Connect all components
- Connect the recommended Cummins® electronic service tool or equivalent.
- Disable 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: S00001428
Verification
Conditions
- Turn keyswitch ON.
- Connect the recommended Cummins® electronic service tool or equivalent.
Action
- 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 tank heater control valve has been detected.
Linked Solutions
- None
Repair
- Repair or replace the aftertreatment diesel exhaust fluid tank heater control valve.
Validation
- Connect all components
- Connect the recommended Cummins® electronic service tool or equivalent.
- Disable 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.