Cummins ISM code 596 is the DiagTechPro reference page for this Cummins diagnostic fault code 596 document, a 3-page PDF sourced from TruckFaultCodes.com (Copyright 2017) covering the lamp: amber electrical charging system voltage – data valid but above normal operational range – moderately severe level isx condition. The electronic control module (ECM) receives constant voltage from the batteries through the unswitched battery wires that are connected directly to the positive (+) battery post. The ECM receives switched battery input through the vehicle key switch wire when the vehicle key switch is turned on. When the condition is detected the ECM logs the fault and illuminates the amber warning lamp.
Cummins ISM code 596 document details
| Brand | Cummins |
|---|---|
| Model coverage | and ISM – ECM Power Supply Circuit (ISM CM871, 2007-09) |
| System / Group | ISM CM871 (2007-09) / DTCs |
| Fault identifier | Code 596 (PID P167, SPN 167, FMI 0/16) |
| Warning lamp | Amber |
| Source | TruckFaultCodes.com |
| Year / Revision | Copyright 2017 |
| Pages | 3 |
| File size | 0.2 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 – ECM Power Supply Circuit electronic engines in the ISM CM871 (2007-09) family used in on-highway and vocational trucks. The ECM is connected to the battery by the ECM power harness. This direct link provides a constant power supply for the ECM. Verify the electronic control module (ECM) calibration is correct. If necessary, recalibrate the ECM. The troubleshooting section walks through connector and pin inspection, circuit measurements and step-by-step checks, then confirms code 596 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 Cummins ISM code 596 manual
Any mechanic or workshop owner diagnosing ISM code 596 needs this PDF to follow the factory diagnostic steps in the correct order and avoid replacing parts that are still good. This fault code is part of the Battery Voltage Monitor feature.
Related manuals library
The full PDF is available in the DiagTechPro manuals library; a free account is required to download.
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