Cummins ISX15 CM2250 (2010-12) Fault Code: 1713 PID: SPN: 3363 FMI: 16 Aftertreatment 1 Diesel Exhaust Fluid tank Heater- Data Valid But Above Normal Operating Range- Moderately Severe Level

Circuit Description
The aftertreatment diesel exhaust fluid tank heater keeps the diesel exhaust fluid from freezing in the diesel exhaust fluid tank. The tank heater consists of an electrically powered tank heater control valve which controls the flow of engine coolant to a heating coil inside the diesel exhaust fluid tank. The tank heater control valve opens to allow coolant to flow to the heating coil when heating is commanded, and closes when heating is no longer required.

Component Location
The diesel exhaust fluid (DEF) tank heater control valve is installed on the coolant supply line located near the DEF tank. Specific locations will vary depending on the OEM.

The diesel exhaust fluid (DEF) tank heating coil is internal to the DEF tank.

Conditions for Running the Diagnostics
This diagnostic runs continuously when diesel exhaust fluid tank heating is being commanded.

Conditions for Setting the Fault Codes
The Engine Control Module (ECM) detected the DEF tank temperature was greater than 75?C [170?F] indicating the aftertreatment diesel exhaust fluid tank heater was in the ON position when the ECM was commanding the heater to be in the OFF position.

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.
Engine torque will be reduced if the engine is operated for an extended period of time with this fault active.
Conditions for Clearing the Fault Code
To validate the repair, perform a key cycle, start the engine and let it idle for 1 minute.
The fault code status displayed by INSITE? electronic service tool 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 INSITE? electronic service tool can be used to clear active and inactive faults, as well as extinguish the MIL for OBD applications.

Shop Talk
Before troubleshooting this fault code, make sure the equipment is not equipped with an auxiliary heating device for the diesel exhaust fluid tank. Such a device can result in overheating the diesel exhaust fluid in the tank.

This fault code may be inactive when the vehicle is brought in for service. Even if inactive, follow the troubleshooting tree completely.

Reason: If there is a problem with the diesel exhaust fluid (DEF) tank heater control valve, the valve is stuck open, there is coolant leaking past the valve seat, or the valve is incorrectly installed, it can take long periods of operation at high load before the tank temperature gradually increases to the fault code threshold value of 77?C [170?F]. As soon as the temperature drops below 75?C [167?F] due to a stopped engine, overnight parking, reduced coolant temperature, and so forth, the fault code will go inactive while the root cause of the issue is still present.
Possible causes of this fault code include:

Aftertreatment diesel exhaust fluid tank heater control valve installed incorrectly, reversed relative to coolant flow direction.
Malfunctioning aftertreatment diesel exhaust fluid tank heater control valve ? stuck open or leakage past the valve seat.
Malfunctioning aftertreatment diesel exhaust fluid controller continuously commanding tank heating.
Reference the appropriate OEM wiring diagram when troubleshooting circuits that utilize wiring supplied by the OEM.

For intermittent power supply and datalink communication issues with Aftertreatment Components, it is highly recommended that the OEM Power Distribution Center fuses and relays be thoroughly checked for loose, missing or intermittent connections.

Possible Cause:
1) DEF tank temperature sensor failure
2) DEF tank heater control valve failure
3) ECM calibration