This fault code 3562 DTCs document is a troubleshooting procedure for the aftertreatment diesel exhaust fluid line heater relay circuit. It explains a voltage above normal or shorted to high source condition on the diesel exhaust fluid line heater relay, with diagnostic steps for controller wiring, relay checks, ECM calibration, and fault clearing.
Official fault code 3562 DTCs document details
| Brand | Cummins |
|---|---|
| Model coverage | ISB6.7 CM2250; associated coverage also lists ISF2.8 CM2220, ISF3.8 CM2220, ISC8.3 and ISL9 CM2250, ISX15 CM2250, GX CM2250, and ISX11.9 CM2250 |
| System/Group | ISB6.7 CM2250 (2010-12) / DTCs; Aftertreatment Diesel Exhaust Fluid Line Heater Circuit |
| Publication no. | 4022254 for ISB6.7 CM2250 in the Associated Procedures table |
| Year/Revision | Last Modified: 11-Jun-2010; troubleshooting steps Last Modified: 07-Dec-2010 |
| Pages | 11 |
| 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 controller and harness.
- Guided Step 3 – Check the aftertreatment diesel exhaust fluid line heater relay.
- Guided Step 4 – Check ECM calibration and clear fault codes.
Applicable truck models
The procedure applies to Cummins ISB6.7 CM2250 coverage in this file and also references related CM2250 and CM2220 engine platforms in the Associated Procedures table. The fault concerns SPN 5491 FMI 3, where high signal voltage is detected at the diesel exhaust fluid line heater relay and diesel exhaust fluid line heaters 1, 2, and 3 are disabled. The relay location is OEM dependent, so the OEM service manual is required for vehicle-specific relay placement and harness routing. Official manufacturer information is available from Cummins.
Who needs this fault code 3562 DTCs manual
This manual is for diesel technicians, fleet workshops, and diagnostic tool users tracing an amber CHECK ENGINE or MIL complaint related to the aftertreatment diesel exhaust fluid line heater relay. It is useful when confirming inactive fault status with INSITE™ electronic service tool, inspecting the 53-pin aftertreatment diesel exhaust fluid controller connector, measuring resistance, checking for pin-to-pin shorts, replacing a failed relay, or confirming ECM calibration revision.
The full PDF is available in the DiagTechPro manuals library, free account required to download.
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