This document is a oil pressure sensor DTCs fault code guide for Fault Code 135 on ISB CM550 engines. It covers the oil pressure sensor circuit, ECM signal checks, connector inspection, harness resistance tests, and fault-code clearing after repair. The file is a 5-page PDF intended for diagnostic work on the listed Cummins engine platform.
Official oil pressure sensor DTCs document details
| Brand | Cummins |
|---|---|
| Model coverage | ISB CM550 (1990-94) |
| System/Group | DTCs; oil pressure sensor circuit |
| Publication no. | Not specified |
| Year/Revision | Unknown; extract shows Copywrite 2017 |
| Pages | 5 |
| File size | 0.4 MB |
| Format | |
| Language | English |
Document table of contents
- FAULT CODE: 135
- PID: P100
- SPN: 100
- FMI: 3
- OIL PRESSURE SENSOR CIRCUIT
- DESCRIPTION
- COMPONENT LOCATION
- TROUBLESHOOTING STEPS
- Step 1A) Read the fault codes using the diagnostic tool
- Step 2A) Inspect the oil pressure sensor and engine harness connector pins
- Step 2B) Check the oil pressure sensor supply voltage
- Step 2C) Check the oil pressure sensor signal voltage
- Step 3A) Inspect the engine harness and ECM connector pins
- Step 3B) Check for an open circuit
- Step 3C) Check for a short circuit to ground
- Step 3D) Check for a short circuit from pin to pin
- Step 4A) Disable and verify Fault Code 135
- Step 4B) Clear inactive fault codes
Applicable truck models
This oil pressure sensor DTCs procedure applies to Cummins ISB CM550 (1990-94) engine coverage shown in the file information. The extract identifies the component as being located on the engine block, below and to the right of the ECM, and it does not list specific truck makes or chassis models. For manufacturer information, visit Cummins official website.
Who needs this pressure sensor DTCs manual
This manual is useful for mechanics, diesel diagnostic technicians, and workshop owners troubleshooting Fault Code 135, PID P100, SPN 100, FMI 3. It supports checks with a diagnostic tool, breakout cable Part Number 3824775, voltage measurements, pin inspections, resistance tests, ECM evaluation, and final code clearing.
The full PDF is available in the DiagTechPro manuals library, free account required to download.
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