Cummins X12 CM2350 Fault Code 2692 |SPN 3936 |FMI 2/2

Uncategorized

FAULT CODE 2692

Aftertreatment 1 Diesel Particulate Filter System – Data Erratic, Intermittent, or Incorrect

Overview

 

CODE REASON EFFECT
Fault Code: 2692
PID: 
SPN: 3936
FMI: 2/2
LAMP: Amber
SRT:

 

The aftertreatment particulate matter sensor has detected a problem with the diesel particulate filter system.

 

 

Possible reduced engine performance.

 
SAE J1939 Datalink

Circuit Description

The aftertreatment particulate matter sensor is a smart device and communicates with the engine control module (ECM) via the J1939 data link. The aftertreatment particulate matter sensor performs internal diagnostics and reports malfunctions back to the primary ECM using the J1939 data link. The particulate matter sensor is permanently attached to the particulate matter control module. They are serviced as a single component and can not be replaced individually. The aftertreatment particulate matter sensor is used to measure the soot emissions at the outlet of the aftertreatment system.

Component Location

The aftertreatment particulate matter sensor location can vary depending on engine application. It is usually located in the exhaust system at the outlet of the selective catalytic reduction (SCR) catalyst.

 

Conditions for Running the Diagnostics

This diagnostic runs when the aftertreatment SCR outlet temperature has been above 200C [392 F] for a calibratible period of time while the engine is running.

Conditions for Setting the Fault Codes

The aftertreatment particulate matter sensor detected soot emissions higher than a calibrated value.

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 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.
  • 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.
  • The ECM will turn off the amber CHECK ENGINE lamp immediately after the diagnostic runs and passes.
  • The fault code status displayed by INSITE electronic service tool will change to inactive 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 INSITE electronic service tool can be used to clear active and inactive faults, as well as extinguish the MIL for OBD applications

 

Shop Talk

Possible causes for this fault include:

The aftertreatment diesel particulate filter is cracked or broken

An engine malfunction resulting in high engine out smoke

Malfunctioning aftertreatment particulate matter sensor

Troubleshooting Summary

  1. Fault Code 2692 requires that ALL solutions be performed
  2. Check for primary fault codes
  3. Aftertreatment Diesel Particulate Filter Regeneration Analyzer Test
  4. ECM calibration revision history check
  5. Aftertreatment DPF is malfunctioning

Verification

Conditions

  • Turn keyswitch OFF.

Action

  • This solution is information only.
  • ALL solutions displayed for this fault code must be performed.
  • Continue to perform the verifications of ALL solution steps listed for this fault code regardless if a given solution is within specification or out of specification.
  • If redirected in this troubleshooting to another fault code or symptom it is required to come back to this fault code troubleshooting and complete every step.

Specification

  • This solution is information only.

Linked Solutions

  • None

Repair

  • If a resolution is found in any solution for this fault code, continue performing ALL solutions listed for this fault code.

Validation

  • None

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 Particulate sensor: 4143, 4144, 4153, 4154, 5577, 5578, 5579, 5581, 5582, 5583, 5584, 5792, 5793, 5837, 6642, 6643, 6644, 6645, 6646, 6647, 6648, 6649, 6651, 6652, 6653, 6688
  • Aftertreatment DPF: 1993

Linked Solutions

  • None

Repair

  • Perform a search on the appropriate fault codes.

Validation

  • None

Verification

Conditions

  • Reconnect previously disconnected components.
  • Turn keyswitch ON.
  • Connect the recommended Cummins electronic service tool or equivalent.

Action

  • Use the recommended Cummins electronic service tool or equivalent.
  • Perform the Aftertreatment Diesel Particulate Filter Regeneration Analyzer Test.
  • Verify the recommended Cummins electronic service tool or equivalent has a version that supports this test.

Specification

  • If the Aftertreatment Diesel Particulate Filter Regeneration Analyzer Test does not pass, then reset the search to Aftertreatment Diesel Particulate Filter Regeneration Analyzer Did Not Pass. Only select the solution title that matches the error messages in the recommend Cummins electronic service tool or equivalent.
  • If the Aftertreatment Diesel Particulate Filter Regeneration Analyzer Test will not start, then reset the search to Aftertreatment Diesel Particulate Filter Regeneration Analyzer Did Not Start.
  • If the Aftertreatment Diesel Particulate Filter Regeneration Analyzer Test does not complete, then reset the search to Aftertreatment Diesel Particulate Filter Regeneration Analyzer Did Not Complete.

Linked Solutions

  • None

Repair

  • No additional action is required for this solution.

Validation

  • None

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.

 

Verification

Conditions

  • Turn keyswitch ON.
  • Connect the recommended Cummins electronic service tool or equivalent.

Action

  • If the aftertreatment DPF has already been replaced during this repair, then disregard this solution.
  • Use the recommended Cummins electronic service tool or equivalent to read the fault codes.

Specification

  • If the fault code is active or inactive with more than one count within the last 25 engine operating hours and no other fault codes have been logged, then proceed to the Repair section.

Linked Solutions

  • None

Repair

  • Replace aftertreatment DPF.
  • Replace the aftertreatment particulate 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.

If all steps have been completed and no root cause has been identified, then follow the technical escalation process.