This fault code 1712 DTCs document is a troubleshooting procedure for the aftertreatment diesel exhaust fluid tank heater circuit. It explains why the ECM sets SPN 3363 FMI 18, what the amber CHECK ENGINE lamp or MIL response means, and how to verify the DEF tank heating system before clearing the code.
Official fault code 1712 DTCs document details
| Brand | Cummins |
|---|---|
| Model coverage | ISB6.7 CM2250, ISC8.3 and ISL9 CM2250, ISX11.9 CM2250, ISX15 CM2250 |
| System/Group | ISB6.7 CM2250 (2010-12) / DTCs; Aftertreatment Diesel Exhaust Fluid Tank Heater Circuit |
| Publication no. | Not stated; associated bulletin numbers include 4022254, 4022257, 4022250, and 2883445 |
| Year/Revision | Last Modified: 11-Jun-2010 |
| Pages | 8 |
| File size | 0.2 MB |
| Format | |
| Language | English |
Document table of contents
- Overview
- Circuit Description
- Component Location
- Conditions for Running the Diagnostics
- Conditions for Setting the Fault Codes
- Action Taken When the Fault Code is Active
- Conditions for Clearing the Fault Code
- Shop Talk
- Associated Procedures
- Troubleshooting Steps
- Guided Step 1 – Check the fault codes.
- Guided Step 2 – Check the aftertreatment diesel exhaust fluid tank heating system.
- Guided Step 3 – Check the aftertreatment diesel exhaust fluid tank heater operation.
- Guided Step 4 – Check ECM calibration and clear fault codes.
Applicable truck models
This procedure applies to Cummins CM2250 engines listed in the document: ISB6.7 CM2250, ISC8.3 and ISL9 CM2250, ISX11.9 CM2250, and ISX15 CM2250. Vehicle placement of the diesel exhaust fluid tank heater control valve varies by OEM, so the procedure directs technicians to the OEM service manual for coolant line routing, tank heater control valve details, and related hardware location. Manufacturer information is available from Cummins official website.
Who needs this fault code 1712 DTCs manual
Workshop technicians, fleet mechanics, and diagnostic service owners need this manual when a truck reports Fault Code 1712, SPN 3363 FMI 18, for a DEF tank heater unable to thaw frozen diesel exhaust fluid. The steps cover INSITE fault-code reading, coolant plumbing inspection, coolant level checks, the “Diesel Exhaust Fluid Doser System Heater Test,” ECM calibration review, and final fault clearing.
The full PDF is available in the DiagTechPro manuals library, free account required to download.
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