This Cummins ISB6.7 fault 334 document is a troubleshooting PDF for engine coolant temperature data that is erratic, intermittent, or incorrect. It explains the fault code summary, circuit description, diagnostic conditions, guided checks with INSITE™ electronic service tool, and repair paths for the sensor circuit, ECM connector, harness, and calibration.
Official Cummins ISB6.7 fault 334 document details
| Brand | Cummins |
|---|---|
| Model coverage | ISB6.7 CM2250; associated coverage also lists ISX11.9 CM2250, ISC8.3 and ISL9 CM2250, ISX15 CM2250, GX CM2250, and other Cummins CM2150/CM2220 platforms in the procedure table. |
| System/Group | ISB6.7 CM2250 (2010-12) / DTCs; Engine Coolant Temperature Sensor Circuit |
| Publication no. | 4022254 for ISB6.7 CM2250 associated procedures |
| Year/Revision | Year unknown; overview last modified 11-Jun-2010; troubleshooting last modified 04-Jan-2011 |
| Pages | 13 |
| 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 for sensor circuit fault codes.
- Guided Step 2 – Check the engine coolant temperature sensor and circuit.
- Guided Step 3 – Check the ECM and engine harness.
- Guided Step 4 – Check ECM calibration and clear fault codes.
Applicable truck models
This file applies to Cummins ISB6.7 CM2250 fault diagnostics for Fault Code 334, PID P0116, SPN 110, FMI 2. The extract also identifies the same engine coolant temperature sensor circuit procedure family for ISX11.9 CM2250, ISC8.3 and ISL9 CM2250, ISX15 CM2250, GX CM2250, ISF2.8 CM2220, ISF3.8 CM2220, ISB4.5, ISB6.7, ISD4.5, and ISD6.7 CM2150, ISL8.9 CM2150, ISM11 CM876, and ISZ13 CM2150 where listed in the associated procedures table. For current manufacturer information, visit Cummins official website.
Who needs this Cummins ISB6.7 fault 334 manual
Workshop technicians, fleet mechanics, and diagnostic tool users need this manual when an amber CHECK ENGINE lamp or MIL is linked to coolant temperature data that fails the cold-soak plausibility check. It is useful for confirming whether the cause is the engine coolant temperature sensor, connector pins, high resistance in signal or return lines, engine wiring harness, ECM response, or ECM calibration.
The procedure states that the engine must be off for 10 hours before this diagnostic runs, then the keyswitch must be turned ON after the cold soak. It guides the user through checking Fault Code 144 and Fault Code 145, inspecting the engine coolant temperature sensor connector, disconnecting the sensor, using jumper-wire circuit response tests, inspecting ECM and engine harness connector pins, and using INSITE™ electronic service tool to read fault codes. The repair direction includes cleaning or repairing damaged connectors, replacing the engine coolant temperature sensor, repairing or replacing the engine harness, requesting authorization before ECM replacement, and updating calibration if required. Full PDF available in the DiagTechPro manuals library, free account required to download.
Related manuals library
Sản phẩm liên quan cho hãng này
Cùng brand theo taxonomy hiện có trong catalog WooCommerce.
Cummins INSITE 9.3 – The Essential Diagnostic Tool for Cummins Engines
Cummins Calterm Version 5.16 – Advanced ECM Control and Precision Tuning for Cummins Engines
Cummins InCal CE – The Calibration and Configuration Tool for Cummins Engines
