Overview
| CODE | REASON | EFFECT |
| Fault Code: 6486 PID: SPN: 4331 FMI: 0/16 LAMP: Amber SRT: |
High aftertreatment diesel exhaust fluid flow detected.
|
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 unit location is original equipment manufacturer (OEM) dependent. Refer to the OEM service manual.
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 Engine Control Module (ECM) detected the aftertreatment diesel exhaust fluid dosing performance is high.
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
- 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:
- Contaminated diesel exhaust fluid
- Blocked, restricted, or frozen diesel exhaust fluid dosing unit supply or pressure line.
- Plugged or restricted aftertreatment diesel exhaust fluid dosing unit inlet connector screen.
- Blocked, restricted, or frozen diesel exhaust fluid dosing valve supply line
- Plugged or restricted aftertreatment diesel exhaust fluid dosing valve inlet filter.
- Malfunctioning or damaged OEM wiring harness.
- Malfunctioning or damaged diesel exhaust fluid dosing unit.
- Malfunctioning or damaged aftertreatment diesel exhaust fluid dosing valve.
Troubleshooting Summary
- Check for primary fault codes
- Technical Service Bulletin is available
- Aftertreatment diesel exhaust fluid dosing unit line or fittings are cracked, plugged or restricted
- Aftertreatment diesel exhaust fluid is contaminated
- Aftertreatment Diesel Exhaust Fluid Dosing Unit Circuit Load Test
- Aftertreatment diesel exhaust fluid dosing valve pressure sensor is malfunctioning
- Aftertreatment diesel exhaust fluid pressure sensor open circuit check
- Aftertreatment diesel exhaust fluid dosing valve pressure check
- Aftertreatment diesel exhaust fluid dosing valve return restriction check
- Aftertreatment diesel exhaust fluid dosing valve inlet filter
- Aftertreatment diesel exhaust fluid dosing unit suction test
- Aftertreatment diesel exhaust fluid dosing unit return circuit check
- Aftertreatment diesel exhaust fluid dosing system cleaning
- Aftertreatment diesel exhaust fluid dosing unit intake restriction
- Aftertreatment diesel exhaust fluid pressure line restricted
- Aftertreatment diesel exhaust fluid dosing unit is malfunctioning
- Aftertreatment Diesel Exhaust Fluid Doser Pump Override test
- Aftertreatment diesel exhaust fluid dosing valve is malfunctioning
- ECM calibration revision history check
Solution: S00001033
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: 1682, 3567, 3568, 3572, 3574, 3575, 5935, 5936
Linked Solutions
- None
Repair
- Perform a search on the appropriate fault codes.
Validation
- None
Solution: S00011021
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: S00000664
Verification
Conditions
- Turn keyswitch OFF.
Action
- Verify the lines are not swapped at the dosing unit, dosing valve or diesel exhaust fluid tank connections.
- Visually inspect the aftertreatment diesel exhaust fluid tank connections for cracks or pitting.
- Visually inspect the aftertreatment diesel exhaust fluid tank vent line for restrictions.
- Visually inspect the aftertreatment diesel exhaust fluid line for damage.
- Visually inspect both dosing unit connections and fittings for loose, leaking, or damaged connections.
- Disconnect the suction line and pressure line dosing unit connectors and look for signs of build-up or blockage.
- Inspect the aftertreatment diesel exhaust fluid dosing unit inlet connector screen.
- Visually inspect the suction line for signs of leakage or openings which will allow the dosing unit to suck in air with the diesel exhaust fluid.
- Visually inspect the pressure line for signs of leakage or rupture.
- Verify proper sealing at all connection points, including diesel exhaust fluid tank, dosing unit, and dosing valve.
Specification
- If there are aftertreament diesel exhaust fluid lines reversed, damaged, leaking or restricted connections found, then proceed to the Repair section.
Linked Solutions
- None
Repair
- Repair or replace damaged components.
Refer to OEM Service Manual
- Replace the aftertreatment diesel exhaust fluid dosing unit inlet connector screen.
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: S00000563
Verification
Conditions
- Turn keyswitch OFF.
Action
- Inspect the aftertreatment diesel exhaust fluid in the tank for signs of debris or contamination.
- Use a diesel exhaust fluid refractometer to measure the concentration of the diesel exhaust fluid in the tank.
Specification
- If there are signs of contaminates in the aftertreatment diesel exhaust fluid, then proceed to the Repair section.
Linked Solutions
- None
Repair
- Drain the diesel exhaust fluid tank, clean thoroughly and refill with pure diesel exhaust fluid.
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: S00006140
Verification
Conditions
- Turn keyswitch OFF.
Action
- Perform the Aftertreatment Diesel Exhaust Fluid Dosing Unit Circuit Load Test.
Specification
- A malfunctioning OEM wiring harness has been detected if the Aftertreatment Diesel Exhaust Fluid Dosing Unit Circuit Load Test is not within specification.
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: S00000662
Verification
Conditions
- Turn keyswitch OFF.
Action
- Wait for 30 seconds.
- Disconnect the aftertreatment diesel exhaust fluid dosing valve pressure line.
- Turn keyswitch ON.
- Connect the recommended Cummins® electronic service tool or equivalent.
- Use the recommended Cummins® electronic service tool or equivalent.
- Monitor the aftertreatment diesel exhaust fluid pressure.
Specification
- Proceed to the Linked Solutions section if the aftertreatment diesel exhaust fluid pressure reading is not within the following specification: 0 ± 69 kPa [0 ± 10 psi]
Linked Solutions
- Aftertreatment diesel exhaust fluid pressure sensor open circuit check
Repair
- No additional action is required for this solution.
Validation
- None
Solution: S00000663
Verification
Conditions
- Turn keyswitch OFF.
- Disconnect the OEM wiring harness connector from the ECM.
- Disconnect the aftertreatment 1 diesel exhaust fluid dosing valve from the OEM wiring harness.
Action
- Inspect the pins and connectors for damage.
- 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.
- 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.
- 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.
- 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 aftertreatment diesel exhaust fluid pressure sensor 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 aftertreatment diesel exhaust fluid dosing valve.
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: S00006220
Verification
Conditions
- Turn keyswitch OFF.
Action
- Install the aftertreatment diesel exhaust fluid pressure gauge between the inlet of the aftertreatment diesel exhaust fluid dosing valve and the pressure line.
This is the supply line between the aftertreatment diesel exhaust fluid dosing unit and the aftertreatment diesel exhaust fluid dosing valve.
- Perform the Aftertreatment Diesel Exhaust Fluid System Leak Test found under ECM Diagnostic Tests.
Specification
- If the aftertreatment diesel exhaust fluid pressure is greater than specification, then proceed to the Linked Solutions section.
Linked Solutions
- Aftertreatment diesel exhaust fluid dosing valve return restriction check
- Aftertreatment diesel exhaust fluid dosing valve inlet filter
Repair
- No additional action is required for this solution.
Validation
- None
Solution: S00000873
Verification
Conditions
- Turn keyswitch OFF.
Action
- Wait for 30 seconds.
- Install the diesel exhaust fluid pressure gauge at the diesel exhaust fluid dosing valve outlet.
This is the return line between the dosing valve and the tank.
- Reconnect the diesel exhaust fluid pressure line to the inlet of the dosing valve.
- Turn keyswitch ON.
- Use the recommended Cummins® electronic service tool or equivalent.
- Perform the Aftertreatment Diesel Exhaust Fluid System Leak Test found under ECM Diagnostic Tests.
- Read the diesel exhaust fluid pressure from the service tool gauge.
Specification
- A malfunctioning aftertreatment diesel exhaust fluid dosing valve has been detected if the aftertreatment diesel exhaust fluid pressure is less than the following: 70 kPa [10 psi]
- A blocked or restricted return line or tank head has been detected if the aftertreatment diesel exhaust fluid pressure is greater than the following: 70 kPa [10 psi]
Linked Solutions
- None
Repair
Repair or replace only the components that were found to be out of specification.
- Clean or replace the return line as necessary.
Refer to OEM Service Manual
- Clean or replace the tank head as necessary.
Refer to OEM Service Manual
- Replace the aftertreatment diesel exhaust fluid dosing valve.
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: S00008348
Verification
Conditions
- Turn keyswitch OFF.
Action
- Replace the aftertreatment diesel exhaust fluid dosing valve inlet filter.
- Turn keyswitch ON.
- Connect the recommended Cummins® electronic service tool or equivalent.
- Perform the Aftertreatment Diesel Exhaust Fluid Dosing System Pressure Test at the diesel exhaust fluid dosing valve inlet.
Specification
- A malfunctioning aftertreatment diesel exhaust fluid dosing valve inlet filter has been detected if the Aftertreatment Diesel Exhaust Fluid Dosing System Pressure Test is within specification.
- A malfunctioning aftertreatment diesel exhaust fluid dosing valve has been detected if the Aftertreatment Diesel Exhaust Fluid Dosing System Pressure Test is greater than specification.
Linked Solutions
- None
Repair
Repair or replace only the components that were found to be out of specification.
- Replacement of the aftertreatment diesel exhaust fluid dosing valve inlet filter resolved the issue.
- Replace the aftertreatment diesel exhaust fluid dosing valve.
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: S00000672
Verification
Conditions
- Turn keyswitch ON.
- Connect the recommended Cummins® electronic service tool or equivalent.
Action
- Perform the Aftertreatment Diesel Exhaust Fluid Dosing Unit Suction Test.
Specification
- If the aftertreatment diesel exhaust fluid dosing unit does not operate during the test, then proceed to the Linked Solutions section and perform the aftertreatment diesel exhaust fluid dosing unit return circuit check.
- Proceed to the Linked Solutions section and perform the aftertreatment diesel exhaust fluid dosing system cleaning if vacuum is less than the following specification: -203 mm-hg [-8.0 in-hg]
- Proceed to the next solution if the vacuum in diagnostic line is greater than the following: -203 mm-hg [-8.0 in-hg]
Linked Solutions
- Aftertreatment diesel exhaust fluid dosing unit return circuit check
- Aftertreatment diesel exhaust fluid dosing system cleaning
Repair
- No additional action is required for this solution.
Validation
- None
Solution: S00000858
Verification
Conditions
- Turn keyswitch ON.
Action
- Proceed to the next solution if the aftertreatment diesel exhaust fluid dosing unit motor runs.
- Turn keyswitch OFF.
- Disconnect the aftertreatment diesel exhaust fluid dosing unit from the OEM wiring harness.
- Disconnect the OEM wiring harness connector from the ECM.
- Inspect the pins and connectors for damage.
- Measure the resistance between the aftertreatment diesel exhaust fluid dosing unit RETURN pin at the aftertreatment diesel exhaust fluid dosing unit connector of the OEM wiring harness and the aftertreatment diesel exhaust fluid dosing unit RETURN pin at the OEM wiring harness ECM connector.
- 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 aftertreatment diesel exhaust fluid dosing unit 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 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: S00002910
Verification
Conditions
- Turn keyswitch OFF.
Action
- Drain, clean, and refill the diesel exhaust fluid dosing system.
- Drain the diesel exhaust fluid tank, clean thoroughly, replace filter and refill with pure clean diesel exhaust fluid.
- Perform the aftertreatment diesel exhaust fluid dosing unit manual purge.
- Turn keyswitch ON.
- Connect the recommended Cummins® electronic service tool or equivalent.
- Perform the Aftertreatment Diesel Exhaust Fluid Dosing Unit Suction Test.
Specification
- A malfunctioning aftertreatment diesel exhaust fluid dosing unit has been detected if vacuum is less than the following specification: -203 mm-hg [-8.0 in-hg]
- Excessive blockage or buildup has been detected in the aftertreatment diesel exhaust fluid dosing system and the aftertreatment diesel exhaust fluid dosing unit can be reused if the vacuum is greater than the following specification: -203 mm-hg [-8.0 in-hg]
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.
- Cleaning of the aftertreatment diesel exhaust fluid dosing system resolved the issue.
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: S00000732
Verification
Conditions
- Turn keyswitch ON.
- Connect the recommended Cummins® electronic service tool or equivalent.
Action
- Check the aftertreatment diesel exhaust fluid dosing unit intake restriction.
Specification
- If the vacuum in diagnostic line is not within specification, then proceed to the Repair section.
Linked Solutions
- None
Repair
Repair or replace only the components that were found to be out of specification.
- Replace the diesel exhaust fluid tank filter.
Refer to OEM Service Manual
- Clean or replace the aftertreatment diesel exhaust fluid intake line.
Refer to OEM Service Manual
- Clean or replace the aftertreatment diesel exhaust fluid tank header.
Refer to OEM Service Manual
- Clean or replace the aftertreatment diesel exhaust fluid tank vent.
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: S00003284
Verification
Conditions
- Turn keyswitch OFF.
Action
- Install the aftertreatment diesel exhaust fluid pressure gauge between the outlet of the aftertreatment diesel exhaust fluid dosing unit and the pressure line.
This is the supply line between the aftertreatment diesel exhaust fluid dosing unit and the aftertreatment diesel exhaust fluid dosing valve.
- Perform the Aftertreatment Diesel Exhaust Fluid Dosing System Pressure Test.
Specification
- If the aftertreatment diesel exhaust fluid pressure is greater than specification, then a restricted aftertreatment diesel exhaust fluid pressure line has been detected.
- Proceed to the Linked Solutions section if the aftertreatment diesel exhaust fluid pressure is less than specification.
Linked Solutions
- Aftertreatment diesel exhaust fluid dosing unit is malfunctioning
Repair
- Clean or replace the aftertreatment diesel exhaust fluid pressure line.
Refer to OEM Service Manual
Validation
- None
Solution: S00003230
Verification
Conditions
- Turn keyswitch OFF.
Action
- Visually inspect the aftertreatment diesel exhaust fluid dosing unit outlet fitting for signs of blockage or buildup.
- Visually inspect the aftertreatment diesel exhaust fluid dosing unit filter for signs of blockage or buildup.
- Visually inspect the aftertreatment diesel exhaust fluid dosing valve inlet fitting screen for signs of blockage or buildup.
Specification
- If there are no signs of blockage or buildup, then a malfunctioning aftertreatment diesel exhaust fluid dosing unit has been detected.
- If there are signs of blockage or buildup, then a restricted aftertreatment diesel exhaust fluid dosing unit outlet fitting or aftertreatment diesel exhaust fluid dosing valve inlet fitting 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.
- Replace the aftertreatment diesel exhaust fluid dosing unit filter regardless of condition.
- Clean the aftertreatment diesel exhaust fluid dosing unit outlet fitting.
- Clean the aftertreatment diesel exhaust fluid dosing valve inlet fitting.
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: S00002761
Verification
Conditions
- Reconnect all aftertreatment diesel exhaust fluid lines and electrical connectors to the dosing unit and aftertreatment diesel exhaust fluid tank if they have been previously disconnected during troubleshooting.
Action
- Remove the aftertreatment diesel exhaust fluid dosing valve from the decomposition tube.
- Turn keyswitch ON.
- Connect the recommended Cummins® electronic service tool or equivalent.
- Use the recommended Cummins® electronic service tool or equivalent.
- Perform the Aftertreatment Diesel Exhaust Fluid Doser Pump Override Test.
The Aftertreatment Diesel Exhaust Fluid Doser Pump Override test can only be ran twice before a key cycle needs to be performed.
Specification
- If the Aftertreatment Diesel Exhaust Fluid Doser Pump Override Test meets the specification, then proceed to the next solution.
- If the Aftertreatment Diesel Exhaust Fluid Doser Pump Override Test does not meet the specification, then proceed to the Linked Solutions section.
Linked Solutions
Click on the link below:
- Aftertreatment diesel exhaust fluid dosing valve is malfunctioning
Repair
- No additional action is required for this solution.
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: S00002764
Verification
Conditions
- Turn keyswitch OFF.
- Connect the recommended Cummins® electronic service tool or equivalent.
Action
- Clean the aftertreatment diesel exhaust fluid dosing valve.
- Turn keyswitch ON.
- Use the recommended Cummins® electronic service tool or equivalent.
- Perform the Aftertreatment Diesel Exhaust Fluid Doser Pump Override Test.
Specification
- If the Aftertreatment Diesel Exhaust Fluid Doser Pump Override Test is not within specification, then proceed to the Repair section.
Linked Solutions
- None
Repair
Repair or replace only the components that were found to be out of specification.
- Replace the aftertreatment diesel exhaust fluid dosing valve.
- 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: 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.
If all steps have been completed and no root cause has been identified, then follow the technical escalation process.