Overview
| CODE | REASON | EFFECT |
| Fault Code: 3242 PID: SPN: 3363 FMI: 7/7 LAMP: Amber SRT: |
The aftertreatment diesel exhaust fluid temperature did not increase when the aftertreatment diesel exhaust fluid tank heater was commanded ON.
|
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 a calibrated amount of time after diesel exhaust fluid tank heating is first commanded.
Conditions for Setting the Fault Codes
The aftertreatment diesel exhaust fluid tank heater was commanded on by the engine engine control module (ECM), but no corresponding temperature increase in the aftertreatment diesel exhaust fluid tank temperature was recorded by the tank temperature sensor.
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.
Conditions for Clearing the Fault Code
- The fault code status in the recommended Cummins® electronic service tool or equivalent will change to INACTIVE immediately after the system is able to adequately heat and the diagnostic runs and passes. If heating can not be completed, use the «Diesel Exhaust Fluid Doser System Heater Test» found under «ECM Diagnostic Test» in the recommended Cummins® electronic service tool or equivalent to command heating to the tank heater and all line heaters.
- 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:
Aftertreatment diesel exhaust fluid tank heater control valve stuck closed
Blockage or restrictions in the coolant plumbing to the diesel exhaust fluid tank heater
Engine coolant level low
Malfunctioning aftertreatment diesel exhaust fluid tank heater control valve
Reference the appropriate OEM wiring diagram when troubleshooting circuits that utilize wiring supplied by the OEM.
Troubleshooting Summary
- Check for primary fault codes
- Restricted or leaking aftertreatment diesel exhaust fluid tank heater control valve coolant lines
- Aftertreatment diesel exhaust fluid tank heater control valve is installed incorrectly
- ECM calibration revision history check
- Aftertreatment diesel exhaust fluid tank heater control valve malfunctioning
Solution: S00001396
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:
- Aftertreatment diesel exhaust fluid system: 1677, 1678, 1679, 1683, 1684, 3237, 3258, 3261, 3422, 3425, 3426, 3429, 3576, 4168, 4169
- Engine coolant level: 195, 196, 197
Linked Solutions
- None
Repair
- Perform a search on the appropriate fault codes.
Validation
- None
Solution: S00000784
Verification
Conditions
- Turn keyswitch OFF.
- Verify that the engine coolant level is within normal operating range.
Action
- Visually inspect the aftertreatment diesel exhaust fluid tank heater coolant lines for signs of damage, leaking lines, leaking gaskets, leaking seals, or loose connections.
Refer to OEM Service Manual
- Visually inspect the aftertreatment diesel exhaust fluid tank heater coolant lines for kinks, or restrictions including the OEM in-line shutoff valve.
Refer to OEM Service Manual
Specification
- If there are any leaks or restrictions in the aftertreatment diesel exhaust fluid tank heater coolant lines, then a malfunctioning aftertreatment diesel exhaust fluid tank heater coolant line or connection has been detected.
Linked Solutions
- None
Repair
- Repair or replace the leaking components.
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: S00000547
Verification
Conditions
- Turn keyswitch OFF.
Action
- Verify the aftertreatment diesel exhaust fluid tank heater control valve is installed correctly, and not reversed.
Specification
- If the aftertreatment diesel exhaust fluid tank heater control valve is reversed, then the incorrect installation of the aftertreatment diesel exhaust fluid tank heater control valve has been detected.
- If the aftertreatment diesel exhaust fluid tank heater control valve is not reversed, 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.
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: S00000443
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.
- 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 revision listed in the ECM calibration revision history for applicable changes.
Specification
- If a calibration update for this fault code is available, the ECM calibration revision must be that revision or higher.
Linked Solutions
- None
Repair
- Prior to downloading the ECM calibration, check to see that all job images and all other troubleshooting has been documented as downloading an ECM calibration will remove the fault codes on the ECM.
- Download the updated ECM calibration code.
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: 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.
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.
If all steps have been completed and no root cause has been identified, then follow the technical escalation process.