This Cummins fault 692 document is a troubleshooting manual for Fault Code 692 on CM2150 engines. It explains the turbocharger compressor inlet temperature sensor circuit fault, related symptoms, diagnostic conditions, harness checks, ECM response tests, and clearing steps for the inactive code.
Official Cummins fault 692 document details
| Brand | Cummins |
|---|---|
| Model coverage | ISB6.7 CM2150 (2007-09); ISC and ISL with CM2150 are also referenced in the circuit description |
| System/Group | DTCs; Turbocharger 1 Compressor Inlet Temperature Sensor Circuit |
| Year/Revision | Last Modified: 20-Jul-2010 |
| Pages | 14 |
| File size | 0.3 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 turbocharger compressor inlet air temperature sensor and circuit.
- Guided Step 3 – Check the ECM and engine harness.
- Guided Step 4 – Clear the fault codes.
Applicable truck models
This file applies to Cummins ISB6.7 CM2150 (2007-09) diagnostic work and references ISC and ISL with CM2150 for the turbocharger compressor inlet air temperature sensor circuit. The extract notes that ISB with CM2150 uses a combination ambient air temperature/pressure sensor in the OEM intake air plumbing instead of a turbocharger compressor inlet temperature sensor. Manufacturer information is available at Cummins official website.
Who needs this Cummins fault 692 manual
Workshop owners, diesel technicians, and fleet mechanics need this Cummins fault 692 manual when an amber CHECK ENGINE light is active and INSITE™ shows Fault Code 692, PID P351, SPN 1172, FMI 4/4. The document supports checks for low signal voltage, short to ground, short to return, damaged connector pins, damaged sensor condition, and engine power derate complaints.
The procedure describes using INSITE™ electronic service tool, turning the keyswitch ON or OFF as instructed, disconnecting the sensor or ECM connector, inspecting harness pins, and measuring resistance. It includes checks for Fault Code 691 active and Fault Code 692 inactive as the expected circuit or ECM response in specific steps. Harness testing includes pin-to-pin short circuit checks and pin-to-ground short circuit checks, with the specification shown as greater than 100k ohms. If the circuit, connector, or harness is repaired, the final guided steps require starting the engine, idling for 1 minute, verifying the code is inactive, and clearing inactive fault codes.
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