Cummins ISM code 1675 is the Cummins ISM CM871 (2007-09) diagnostic reference for fault code 1675, the aftertreatment diesel particulate filter inlet temperature sensor DTC that is set when the exhaust gas temperature 2 circuit reads above normal or shorts to a high source. This 6-page PDF from the Cummins ISX and ISM Troubleshooting and Repair documentation lists the fault identifiers, component description, and step-by-step checks. It carries PID S327, SPN 3249, FMI 3/3, and lights Amber warning lamp.
Official document details
| Brand | Cummins |
| Model coverage | ISM CM871 (2007-09) and ISX CM871 engines |
| System / group | ISM CM871 (2007-09) / DTCs |
| Fault code | 1675 — SPN 3249, FMI 3/3, PID S327 |
| Warning lamp | AMBER |
| Pages | 6 |
| File size | 0.4 MB |
| Format | |
| Language | English |
Document table of contents
- Fault code identification (PID, SPN, FMI, warning lamp)
- Description
- Shop Talk
- Component location
- Troubleshooting steps
Cummins ISM code 1675 diagnosis
Fault code 1675 is set when the exhaust gas temperature 2 circuit reads above normal or shorts to a high source. The thermistor-type sensor changes resistance with temperature and the ECM reads the signal voltage as a temperature value. The catalyst inlet temperature sensor shares return wires in the OEM harness with other sensors, so a shorted return can make several codes active. According to the Cummins Shop Talk guidance, technicians should first verify that the ECM calibration is correct and recalibrate if necessary before component replacement. Possible causes listed in the document include:
- An open circuit in the signal wire.
- A signal wire shorted to a high source or sensor supply.
Applicable truck models and engines
This document applies to Cummins ISM CM871 (2007-09) engines and the closely related ISX CM871 platform used in on-highway trucks, so it suits heavy-duty tractors and vocational trucks fitted with these engines and their aftertreatment systems. Always confirm the engine dataplate and refer to the OEM troubleshooting and repair manual for chassis-specific pin numbers. Full specifications are published on the Cummins official website.
Who needs this Cummins ISM code 1675 manual
Diesel technicians, fleet mechanics, and workshop owners diagnosing the aftertreatment diesel particulate filter inlet temperature sensor on ISM CM871 engines will use this reference to read the fault identifiers correctly and follow the factory test sequence for code 1675.
The complete PDF is available in the DiagTechPro manuals library; a free account is required to download it.
Related manuals library
Sản phẩm liên quan cho hãng này
Cùng brand theo taxonomy hiện có trong catalog WooCommerce.
Cummins Calterm Version 5.16 – Advanced ECM Control and Precision Tuning for Cummins Engines
Cummins INSITE 9.3 – The Essential Diagnostic Tool for Cummins Engines
Cummins InCal CE – The Calibration and Configuration Tool for Cummins Engines
