Overview
| CODE | REASON | EFFECT |
| Fault Code: 3164 PID: SPN: 4360 FMI: 0/15 LAMP: None SRT: |
High SCR intake temperature has been detected.
|
Possible reduced engine performance. |
Circuit Description
The selective catalytic reduction (SCR) intake temperature sensor is used by the engine control module (ECM) to monitor the engine exhaust temperature entering the SCR catalyst. The ECM monitors the voltage on the signal pin and converts this to a temperature value.
Component Location
The SCR intake temperature sensor is located in the aftertreatment system.
Conditions for Running the Diagnostics
This diagnostic runs continuously when the engine is running.
Conditions for Setting the Fault Codes
The Engine Control Module (ECM) detected the temperature at the SCR catalyst intake was greater than a calibrated value.
Action Taken When the Fault Code is Active
- The ECM logs the fault code immediately when the diagnostic runs and fails.
Conditions for Clearing the Fault Code
- To validate the repair using a Diagnostic Road Test, utilize a route that incorporates both stop and go city type driving and steady state highway type driving. It may be necessary to load the unit for certain diagnostics in the ECM to run.
- To validate the repair using a Chassis Dynamometer, utilize a routine that incorporates acceleration and motoring events, steady state highway type operation, and load. This will simulate normal driving and allow the diagnostics in the ECM to run.
- 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 “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:
Degraded, diluted, or incorrect diesel exhaust fluid
Malfunctioning in-range SCR intake temperature sensor
Upstream exhaust system malfunction.
Reference the appropriate OEM wiring diagram when troubleshooting circuits that utilize wiring supplied by the OEM.
Troubleshooting Summary
- Check for primary fault codes
- Aftertreatment diesel exhaust fluid is contaminated
- Leaks in the intake air system
- Charge Air Cooler Leak Test
- Aftertreatment SCR temperature sensor module is malfunctioning
- Aftertreatment SCR temperature sensor module pin to pin short circuit check
- Turbocharger is malfunctioning
- Aftertreatment SCR temperature sensor is malfunctioning
Solution: S00001537
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 SCR: 3142, 3143, 3144, 3145, 3146, 3147, 3148, 3149
Linked Solutions
- None
Repair
- Perform a search on the appropriate fault codes.
Validation
- None
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: S00008386
Verification
Conditions
- Turn keyswitch OFF.
Specification
- If a leak is found, then proceed to the Repair section.
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: S00008815
Verification
Conditions
- Turn keyswitch OFF.
Specification
- If a leak is found, then proceed to the Repair section.
Linked Solutions
- None
Repair
Repair or replace only the components that were found to be out of specification.
- Repair or replace the charge air cooler.
- Repair or replace the charge air cooler hoses.
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: S00002957
Verification
Conditions
- Turn keyswitch ON.
- Connect the recommended Cummins® electronic service tool or equivalent.
Action
- Run the engine at idle for the following minutes: 10
- Monitor the aftertreatment SCR outlet temperature sensor.
- Monitor the aftertreatment SCR intake temperature sensor.
Specification
- Proceed to the Linked Solutions section if the aftertreatment SCR temperature sensors vary by more than the following: 24°C (43°F)
- Proceed to the next solution if the aftertreatment SCR temperature sensors do not vary by more than the following: 24°C (43°F)
Linked Solutions
Click on the link below:
- Aftertreatment SCR temperature sensor module pin to pin short circuit check
Repair
Repair or replace only the components that were found to be out of specification.
- Troubleshoot the OEM wiring harness, engine wiring harness, and all interconnects.
- Repair or replace the OEM wiring harness.
- Repair or replace the engine wiring harness.
Validation
- 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.
- Connect all components
- Connect the recommended Cummins® electronic service tool or equivalent.
- 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.
Solution: S00002960
Verification
Conditions
- Turn keyswitch OFF.
- Disconnect the aftertreatment SCR temperature sensor module from the OEM wiring harness.
- Disconnect the aftertreatment SCR outlet temperature sensor from the aftertreatment SCR temperature sensor module.
- Disconnect the aftertreatment SCR intake temperature sensor from the aftertreatment SCR temperature sensor module.
Action
- Inspect the pins and connectors for damage.
- Measure the resistance of each circuit contained within the aftertreatment SCR temperature sensor module.
- Refer to the circuit diagram or wiring diagram for connector pin identification.
Specification
- Proceed to the Repair section if the resistance is less than the following specification: 100k Ω
Linked Solutions
- None
Repair
Repair or replace only the components that were found to be out of specification.
- Replace the aftertreatment SCR temperature sensor module.
- Replace aftertreatment SCR intake temperature sensor.
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: S00003258
Verification
Conditions
- Turn keyswitch OFF.
- Remove the intake and exhaust connections from the turbocharger.
Action
- Visually inspect the turbocharger compressor and turbine blades for damage or wear.
Specification
- If any damage is found, 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: S00003394
Verification
Conditions
- Turn keyswitch OFF.
- Disconnect the aftertreatment SCR intake temperature sensor from the aftertreatment SCR temperature sensor module.
Action
- Inspect the pins and connectors for damage.
- Remove the SCR intake temperature sensor.
- Visually inspect the SCR intake temperature sensor for damage.
Specification
- If any damage is found to the sensor, 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.