Overview
Code
Fault Code: 1712
PID:
SPN: 3363
FMI: 1/18
LAMP: Amber
SRT:
Reason
The aftertreatment diesel exhaust fluid tank heater is unable to thaw the frozen diesel exhaust fluid.
Effect
Possible reduced engine performance.
Aftertreatment Diesel Exhaust Fluid Tank Heater Circuit
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 tank heater control valve is located near the diesel exhaust fluid tank. Specific location will vary depending on the OEM. The tank heating coil is internal to the diesel exhaust fluid tank.
Conditions for Running the Diagnostics
This diagnostic runs a calibrated amount of time after diesel exhaust fluid tank heating is first commanded.
Conditions for Setting the Fault Codes
The Engine Control Module (ECM) detected the aftertreatment diesel exhaust fluid tank temperature failed to thaw after the aftertreatment diesel exhaust fluid tank heater control valve was commanded open for a calibrated time.
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
- The fault code status in the recommended Cummins electronic service tool or equivalent will change to INACTIVE immediately after the system is able to adequately heat and the diagnostic runs and passes. If heating can not be completed, use the “Diesel Exhaust Fluid Doser System Heater Test” found under “ECM Diagnostic Test” in the recommended Cummins electronic service tool or equivalent to command heating to the tank heater and all line heaters.
- 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 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:
Aftertreatment diesel exhaust fluid tank heater control valve stuck closed
Blockage or restrictons in the coolant plumbing to the diesel exhaust fluid tank heater
Engine coolant level low
Malfunctioning aftertreatment diesel exhaust fluid tank heater control valve
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.
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