This document is a code 352 DTCs troubleshooting manual for the Sensor Supply 1 Circuit voltage below normal or shorted to low source condition. It explains the circuit description, diagnostic conditions, ECM actions, clearing logic, associated procedures, and guided checks for sensors, harness connectors, ECM connections, and calibration status.
Official code 352 DTCs document details
| Brand | Cummins |
|---|---|
| Model coverage | ISB6.7 CM2250; ISC8.3 and ISL9 CM2250; ISX11.9 CM2250; ISX15 CM2250; GX CM2250; QSL9 CM2250; QSB6.7 CM2250 |
| System/Group | ISB6.7 CM2250 (2010-12) / DTCs; Sensor Supply 1 Circuit |
| Year/Revision | Last Modified: 11-Jun-2010; troubleshooting revision shown as 04-Jan-2011 |
| Pages | 18 |
| File size | 0.2 MB |
| Format | |
| Language | English |
Document table of contents
- Overview
- Circuit Description
- Component Location
- Conditions for Running the Diagnostics
- 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 number 1 supply and return
- Guided Step 3 – Check the ECM and engine harness
- ECM Calibration
Applicable truck models
The extract identifies coverage by Cummins engine and ECM family rather than truck make or chassis. It applies to ISB6.7 CM2250, ISC8.3 and ISL9 CM2250, ISX11.9 CM2250, ISX15 CM2250, GX CM2250, QSL9 CM2250, and QSB6.7 CM2250 entries listed in the associated procedures table. The visible bulletin references include 4022254, 4022257, 4022250, 2883445, 4022256, and 4022255 for related procedure lookups. For manufacturer information, visit Cummins official website.
Who needs this code 352 DTCs manual
This manual is useful for diesel technicians, fleet repair shops, and workshop owners diagnosing an amber CHECK ENGINE lamp, MIL activity, or engine power derate linked to a low 5 volt sensor supply. It supports structured checks with INSITE™ electronic service tool instead of replacing EGR, exhaust gas pressure, aftertreatment fuel pressure, harness, or ECM parts without testing.
The fault summary states that the ECM detects sensor supply 1 voltage below 4.75-VDC for more than one second. The circuit supplies the EGR differential pressure sensor, exhaust gas pressure sensor, EGR valve position sensor, EGR orifice pressure sensor if equipped, and aftertreatment fuel pressure sensor if equipped. The procedure directs connector inspections for loose connectors, corroded pins, bent or broken pins, pushed back or expanded pins, moisture, damaged seals, dirt, broken shells, wire insulation damage, and damaged locking tabs. It also includes circuit response checks after disconnecting sensors, turning the keyswitch ON, connecting INSITE™, and reading whether Fault Code 352 remains active.
Later steps move from sensor-level isolation to the ECM and engine harness. The document references Procedure 019-043 for engine wiring harness repair, Procedure 019-031 for Electronic Control Module checks, Procedure 019-032 for ECM Calibration Code, Procedure 019-376 for Exhaust Gas Pressure Sensor, Procedure 019-444 for Aftertreatment Fuel Pressure Sensor, and Procedure 019-461 for EGR Orifice Pressure Sensor. Final validation requires connecting all components, disabling and clearing the fault code, and operating the engine under the listed conditions for clearing the fault code.
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