Cummins ISM code 629 is the DiagTechPro reference page for this Cummins diagnostic fault code 629 document, a 4-page PDF sourced from TruckFaultCodes.com (Copyright 2017) covering the lamp: amber turbocharger 1 compressor inlet pressure – data valid but below normal operating range – moderately severelevel isx condition. The pressure differential over the compressor seal is a calculated value derived from the difference between charge pressure and crankcase pressure. When the condition is detected the ECM logs the fault and illuminates the amber warning lamp.
Cummins ISM code 629 document details
| Brand | Cummins |
|---|---|
| Model coverage | and ISM Electronic Control Module (ECM) (ISM CM871, 2007-09) |
| System / Group | ISM CM871 (2007-09) / DTCs |
| Fault identifier | Code 629 (PID 1176, SPN 1176, FMI 1/18) |
| Warning lamp | Amber |
| Source | TruckFaultCodes.com |
| Year / Revision | Copyright 2017 |
| Pages | 4 |
| File size | 0.1 MB |
| Format | |
| Language | English |
Document table of contents
- Circuit Description
- Component Location
- Shop Talk
- Troubleshooting Steps
- Repair verification and clearing fault codes
Applicable truck models
This document applies to Cummins and ISM Electronic Control Module (ECM) electronic engines in the ISM CM871 (2007-09) family used in on-highway and vocational trucks. None Verify the ECM calibration is correct. Possible causes of this fault code include: Crankcase filter needs to be replaced. The troubleshooting section walks through connector and pin inspection, circuit measurements and step-by-step checks, then confirms code 629 is inactive before all fault codes are cleared. Verify engine calibration and coverage against the official Cummins engine support site before ordering parts.
Who needs this ISM code 629 manual
Any mechanic or workshop owner diagnosing ISM code 629 needs this PDF to follow the factory diagnostic steps in the correct order and avoid replacing parts that are still good. Verify the ECM calibration is correct.
Related manuals library
The full PDF is available in the DiagTechPro manuals library; a free account is required to download.
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