This 13 pages manual explains Fault Code 1696 for CM2150 engines and the sensor supply 5 low-voltage diagnostic. It covers the ECM 5 volt supply circuit, affected sensors, derate effects, guided INSITE™ checks, OEM harness inspection, resistance testing, and fault-code clearing steps.
Official 13 pages document details
| Brand | Cummins |
|---|---|
| Model coverage | ISB, ISC, and ISL with CM2150; file group lists ISB6.7 CM2150 (2007-09) |
| System/Group | DTCs; Sensor Supply 5 – Voltage Below Normal or Shorted to Low Source |
| Publication no. | Not shown in extract |
| Year/Revision | Last Modified: 20-Jul-2010 |
| Pages | 13 |
| File size | 0.3 MB |
| Format | |
| Language | English |
Document table of contents
- Overview
- Circuit Description
- Component Location
- Conditions for Running the Diagnostics
- FAULT CODE 1696
- 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 sensors and circuits connected to the sensor supply return.
- Guided Step 3 – Check the ECM and OEM harness.
- Guided Step 4 – Clear the fault codes.
Applicable truck models
This document applies to Cummins ISB, ISC, and ISL engines with CM2150 controls, with the file classification specifically identifying ISB6.7 CM2150 (2007-09). The diagnostic concerns ECM sensor supply number 5 in the OEM harness connector, supplying 5 VDC to the aftertreatment diesel particulate filter differential pressure sensor, accelerator position sensor 2, engine coolant level sensor, and optional OEM components such as remote accelerator and tachograph speed sensor; later steps also reference remote throttle and fan speed sensor where equipped. For official manufacturer information, visit Cummins.
Who needs this 13 pages manual
Workshop owners, diesel technicians, and fleet mechanics need this ISB fault code manual when an amber CHECK ENGINE light appears with SPN 3513 FMI 4/4 and the engine is limited to limp home throttle control. It is useful for isolating a failed sensor, a short to ground, a short between supply and return, damaged ECM or OEM harness connector pins, or an ECM power supply issue.
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