Cummins M11 code 551 is the DiagTechPro reference page for this Cummins diagnostic fault code 551 document, a 5-page PDF sourced from TruckFaultCodes.com (Copyright 2017) that covers the idle validation switch circuit. The idle validation switch (IVS) is used by the electronic control module (ECM) to indicate when the accelerator pedal is released (on-idle) or depressed (off-idle). The switch is adjusted at the factory to switch from on-idle to off-idle at the correct accelerator pedal position. When the condition is detected the ECM logs the fault and turns on the yellow warning lamp to alert the driver and technician.
Cummins M11 code 551 document details
| Brand | Cummins |
|---|---|
| Model coverage | M11 CELECT Plus (1995-98); N14 CELECT Plus (1995-98) / DTCs |
| System / Group | M11 CELECT Plus (1995-98) |
| Fault identifier | Code 551 (PID P091, SPN 91, FMI 4, SRT 00-611) |
| Warning lamp | Yellow |
| Source | TruckFaultCodes.com |
| Year / Revision | Copyright 2017 |
| Pages | 5 |
| File size | 0.3 MB |
| Format | |
| Language | English |
Document table of contents
- Circuit Description
- Component Location
- Shop Talk
- Troubleshooting Steps
- Repair verification and clearing fault codes
Applicable truck models
This document applies to Cummins M11 CELECT Plus (1995-98); N14 CELECT Plus (1995-98) / DTCs electronic engines used in on-highway and vocational trucks. The IVS is located on the accelerator pedal assembly. The troubleshooting section walks through connector and pin inspection, engine-harness resistance measurements and pin-to-pin continuity checks, and ends with a road test that confirms the code is inactive and all fault codes are cleared. Because the same procedure isolates the sensor, the harness and the ECM in turn, it prevents replacing parts that are still good. Verify engine calibration and coverage against the official Cummins engine support site before ordering parts.
Who needs this Cummins M11 code 551 manual
Any mechanic or workshop owner diagnosing M11 code 551 needs this PDF to follow the factory circuit and resistance checks in the correct order. This fault code is usually caused by a loose connection, an accelerator pedal that is not calibrated, or an IVS that is wired wrong. Breakout cable, Part Number 3824892, is required to check the voltage levels of the SSS.
Applies to these truck models
This is the manufacturer document shared across 2 model families. It applies to:
- Cummins DTCs
- Cummins M11 CELECT Plus (1995-98)
Related manuals library
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