This Cummins fault 698 document is a troubleshooting PDF for the ECM internal temperature sensor circuit on ISB6.7 CM2150 engines. It explains the fault code overview, conditions for setting and clearing the code, and INSITE electronic service tool steps used to confirm whether repair is required.
Official Cummins fault 698 document details
| Brand | Cummins |
|---|---|
| Model coverage | ISB6.7 CM2150 (2007-09); extract also references ISB, ISC, and ISL Electronic Control Module |
| System/Group | DTCs; ECM internal temperature sensor circuit |
| Year/Revision | Last Modified: 20-Jul-2010 |
| Pages | 5 |
| 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 fault codes.
- Guided Step 1A – Check for active fault codes.
- Guided Step 2 – Clear the fault code.
- Guided Step 2A – Disable the fault code.
- Guided Step 2B – Clear the inactive fault codes.
Applicable truck models
This file applies to Cummins ISB6.7 CM2150 (2007-09) diagnostic trouble code information. The extract identifies Fault Code: 698, PID: P21, SPN: 1136, and FMI: 4, with an amber lamp and no performance effect. It also states that the ECM is located on the fuel system side of the engine and refers technicians to Procedure 100-002 (Engine Diagrams) in Section E for a detailed component location view. The fault concerns the ECM Internal Temperature Sensor Circuit – Voltage Below Normal or Shorted to Low Source. The ECM uses an internal temperature sensor to measure the temperature inside the ECM, and the diagnostic runs continuously when the keyswitch is in the ON position. The manufacturer notes that no troubleshooting is possible for this internal sensor fault; if the fault code is active, the ECM must be replaced after authorization. Manufacturer information is available from Cummins official website.
Who needs this Cummins fault 698 manual
This manual is for diesel mechanics, diagnostic technicians, and workshop owners checking an active or inactive ECM internal temperature sensor fault on covered Cummins engines. It is useful when using INSITE™ electronic service tool to read fault codes, verify inactive status, disable the fault code, and clear inactive fault codes.
The full PDF is available in the DiagTechPro manuals library, free account required to download.
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