SFN-20231009E_Enable an engine to perform an active regeneration of the aftertreatment system

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TICO Document #: SFN-20231009E (formerly TES-210)

Complaint: Cummins B6.7 engines fail to perform an active regeneration of the aftertreatment system; the Diesel Particulate Filter Regeneration Permit Switch parameter is ENABLED. Since TICO does not install a permit switch on trucks, the Engine Control Module (ECM) is not able to ground the permit signal, thus inhibiting the engine from running an active regeneration.

Units Affected: B6.7 engines

Description of Procedure Change the Diesel Particulate Filter Regeneration Permit Switch parameter on the ECM from ENABLED to DISABLED.

Required Tools: Cummins INLINE™ & Cummins INSITE™

Planned Labor: 10 mins

Instructions:

  1. Park the vehicle on a flat surface, apply the parking brake, and chock wheels. If your company utilizes a “Lock Out, Tag Out” policy, you should employ it during this procedure. Turn off the engine.

  2. Locate the On-Board Diagnostics (OBD) connectors in the lower left portion of the dash.

  1. Remove the cap from the black (upper) OBD connector (Figure #1) and connect the Cummins INLINE™ adapter.

  1. Turn the key switch to the on position, but do not start the engine.

  1. Open the Cummins INSITE™ program on the computer and connect to the ECM.

  1. Once INSITE™ has connected to the ECM, select the Features and Parameters tab (Figure #2). A list of parameters will appear.

  1. You will find the Diesel Particulate Filter Regeneration Permit Switch parameter under the Aftertreatment group (Figure #3). This parameter should currently be set to ENABLE.

Note: If the parameter is set to DISABLE, proceed to step 12. This parameter is correctly set.

  1. Change the Diesel Particulate Filter Regeneration Permit Switch parameter to DISABLE (Figure #4).

  1. Right-click on the screen. Under Send To, click on ECM (Figure #5).

  1. Proceed with the on-screen prompts.

  1. Once completed, a message will appear stating that all parameters were successfully written to the ECM (Figure #6). Click OK.

  1. Disconnect Cummins INSITE™ program from the ECM before removing the Cummins INLINE™ adapter from the OBD connector.

  1. Turn the key switch to the off position.

  1. Remove the “Lock Out, Tag Out” plaque.

  1. Return the vehicle to service.