Cummins ISB4.5 CM2150 Fault Code: 1682 PID: SPN: 3362 FMI: 31 Aftertreatment Diesel Exhaust Fluid Dosing Unit Input Lines - Condition Exists. - EcuForce Truck (2024)

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Circuit Description
The diesel exhaust fluid dosing unit input lines are responsible for transporting diesel exhaust fluid between the dosing unit, dosing valve, and diesel exhaust fluid tank.

Component Location
There are three diesel exhaust fluid lines. One line is between the dosing unit and dosing valve, and the other two lines are between the dosing unit and diesel exhaust fluid tank. These lines can be partially hidden from view by the SCR system and other vehicle components. Line routing will vary, based on aftertreatment architecture and OEM.

Conditions for Running the Diagnostics
This diagnostic runs when the SCR system is trying to prime.

Conditions for Setting the Fault Codes
The aftertreatment diesel exhaust fluid dosing unit has been unable to successfully prime itself for a calibratible number of attempts.

Action Taken When the Fault Code is Active
-The ECM illuminates the amber CHECK ENGINE lamp and/or the MIL immediately after the diagnostic runs and fails.
-Diesel exhaust fluid injection into the SCR aftertreatment system is disabled.
-Engine torque will be reduced.

Conditions for Clearing the Fault Code
-This fault code can not be cleared with INSITE™ electronic service tool.
-To validate the repair, use INSITE™ electronic service tool to perform the “Diesel Exhaust Fluid Doser Override Test” under the “ECM Diagnostics Test” menu
-The ECM will turn off the amber CHECK ENGINE lamp and/or Malfunction Indicator Lamp (MIL) immediately after the diagnostic runs and passes.
-Use INSITE™ electronic service tool to verify the fault code is inactive.
-The inactive fault code will be cleared from the memory after 9600 hours of engine operation without a re-occurrence.

Shop Talk
This fault indicates that the diesel exhaust fluid dosing unit was unable to successfully build pressure or prime after multiple attempts. If fault code 3612 is also stored in the ECM, the dosing unit might have failed to purge on multiple occasions, and dosing unit damage could possibly have occurred. Troubleshoot Fault Code 3612 after this fault code has been resolved.

Fault Code 1682 is triggered by the following failure modes:

-Low aftertreatment diesel exhaust fluid level in the diesel exhaust fluid tank
-The line heaters are not successfully thawing the frozen diesel exhaust fluid
-The diesel exhaust fluid pressure line between the dosing unit and dosing valve is kinked, broken, or disconnected
-The diesel exhaust fluid suction line between the diesel exhaust fluid tank and the dosing unit is kinked, broken, or disconnected
-Malfunctioning diesel exhaust fluid dosing unit.

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Cummins ISB4.5 CM2150 Fault Code: 1682 PID: SPN: 3362 FMI: 31 Aftertreatment Diesel Exhaust Fluid Dosing Unit Input Lines - Condition Exists. - EcuForce Truck (2024)
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