fault code 2739 DTCs is the Cummins ISX11.9 CM2250 troubleshooting document for Start Enable Device 1 Circuit (Ether Injection) – Voltage Below Normal or Shorted to Low Source (SPN 626, FMI 4/4). This 14-page factory guide explains the circuit, the conditions that set the code, and the guided repair steps used with the INSITE electronic service tool. The ether injection circuit is a device used by the engine to control the ether injection operation.
Official document details
| Brand | Cummins |
| Model coverage | ISX11.9 CM2250/ISX15 CM2250 |
| System / group | ISX11.9 CM2250 (2010-12) / DTCs |
| Fault code | 2739 (PID S237) |
| SPN / FMI | 626 / 4/4 |
| Warning lamp | Amber |
| Bulletin number | 2883445 |
| Revision | Last modified 11-Jun-2010 |
| Pages | 14 |
| File size | 0.3 MB |
| Format | |
| Language | English |
fault code 2739 DTCs table of contents
- Overview and circuit description
- Component location
- Conditions for running the diagnostics
- Conditions for setting the fault code
- Action taken when the fault code is active
- Conditions for clearing the fault code
- Shop Talk and possible causes
- Associated procedures table
- Guided troubleshooting steps
Applicable truck models
This troubleshooting procedure applies to Cummins ISX11.9 CM2250/ISX15 CM2250 engines. The control solenoid location varies by OEM. Refer to the OEM service manual to determine the location. The document states the code is set when ether injection circuit pwm signal is not detected to be system voltage when the pwm signal is turned on. When the code is active, the amber warning lamp is illuminated when this diagnostic runs and fails. Full specifications and procedure references are published by Cummins on the Cummins official website.
Who needs this fault code 2739 DTCs manual
Diesel technicians and workshop owners diagnosing Voltage Below Normal or Shorted to Low Source on ISX11.9 CM2250 engines need this reference. The guide walks through each guided step and the INSITE electronic service tool tests required to validate the repair and clear the code. Each guided step lists the keyswitch position, the required action, and the YES or NO branch that follows. The associated procedures table cross-references the component repair bulletins for the ISX11.9 and ISX15 CM2250 platforms.
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