Cummins ISM code 1696 is the Cummins ISM CM871 (2007-09) diagnostic reference for fault code 1696, the ECM sensor supply 5 circuit DTC that reports that the sensor supply 5 voltage has fallen below normal or shorted to a low source. This 1-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 S232, SPN 3513, FMI 4/4, 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 | 1696 — SPN 3513, FMI 4/4, PID S232 |
| Warning lamp | AMBER |
| Pages | 1 |
| File size | 0.1 MB |
| Format | |
| Language | English |
Document table of contents
- Fault code identification (PID, SPN, FMI, warning lamp)
- Description
- Shop Talk
- Component location
Cummins ISM code 1696 diagnosis
Fault code 1696 reports that the sensor supply 5 voltage has fallen below normal or shorted to a low source. Sensor supply 5 provides a 5-volt feed for the aftertreatment diesel particulate filter differential pressure sensor, the remote accelerator, the tachograph speed sensor, and accelerator position sensor 2, all through the ECM OEM harness connector. 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:
- A short circuit to ground in a supply wire.
- A short between a supply wire and a return wire.
- A failed sensor or a failed ECM power 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 1696 manual
Diesel technicians, fleet mechanics, and workshop owners diagnosing the ECM sensor supply 5 circuit on ISM CM871 engines will use this reference to read the fault identifiers correctly and follow the factory test sequence for code 1696.
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