This 4 pages document covers Fault Code 297 for the OEM pressure sensor circuit on ISB CM550 applications. It explains how the ECM uses the OEM pressure input and gives step-by-step checks for the sensor, OEM harness, ECM connector pins, and diagnostic tool fault status.
Official 4 pages document details
| Brand | Cummins |
|---|---|
| Model coverage | ISB CM550 (1990-94) |
| System/Group | DTCs; OEM Pressure Sensor Circuit |
| Publication no. | Fault Code 297; PID P223; SPN 1084; FMI 3 |
| Year/Revision | Unknown; source copywrite 2017 |
| Pages | 4 |
| File size | 0.2 MB |
| Format | |
| Language | English |
Document table of contents
- FAULT CODE: 297
- PID: P223
- SPN: 1084
- FMI: 3
- OEM PRESSURE SENSOR CIRCUIT
- DESCRIPTION
- COMPONENT LOCATION
- TROUBLESHOOTING STEPS
- Step 1A: Inspect the OEM harness and sensor connector pins
- Step 1B: Check the voltage of the OEM pressure sensor
- Step 2A: Inspect the OEM harness and ECM connector pins
- Step 2B: Read the fault codes using the diagnostic tool
- Step 2C: Check for an open circuit in the signal wire
- Step 2D: Check for a short circuit from the signal wire to all other pins
- Step 3A: Check for appropriate ECM response
- Step 4A: Disable the fault code and verify Fault Code 297 is inactive
- Step 4B: Clear the inactive fault codes using the diagnostic tool
Applicable truck models
This file applies to Cummins ISB CM550 (1990-94) engine control systems where Fault Code 297 is used for an OEM pressure sensor circuit input. The extract states that component location and sensor voltage signal specifications vary with the OEM, so truck-specific wiring and sensor details must be checked in the OEM manual. Manufacturer information is available from Cummins official website.
Who needs this 4 pages manual
Workshop technicians, fleet mechanics, and diagnostic tool users need this 4 pages reference when a truck logs Fault Code 297 with PID P223, SPN 1084, and FMI 3. The procedure is useful for checking connector damage, sensor voltage, signal wire resistance, shorts to other pins, ECM response, and inactive fault code clearing.
The full PDF is available in the DiagTechPro manuals library, free account required to download.
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