Turbocharger 1 Speed – Data Valid but Above Normal Operational Range – Least Severe Level
|Fault Code: 2288
Turbocharger 1 Speed – Data Valid but Above Normal Operational Range – Least Severe Level. High turbocharger speed has been detected by the ECM.
Engine power derate to lower the turbocharger speed.
ISB, ISC, and ISL with CM2150 – Turbocharger 1 Speed Circuit
The turbocharger speed sensor is a variable reluctance speed sensor. It consists of a coil wire and an iron core. The target on the turbocharger shaft is a ground flat in the center of the shaft. As the flat on the turbocharger shaft spins past the speed sensor, a signal is generated. The electronic control module (ECM) interprets this signal and converts it to a turbocharger speed reading.
The turbocharger speed sensor is mounted in the center housing of the turbocharger. Refer to Procedure 100-002 (Engine Diagrams) in Section E for a detailed component location view.
Conditions for Running the Diagnostics
This diagnostic runs continuously when the engine is running.
Conditions for Setting the Fault Codes
The ECM detects that the turbocharger speed is above the maximum calibratible limits.
Action Taken When the Fault Code is Active
- The ECM logs the fault code immediately when the diagnostic runs and fails.
- The ECM will reduce torque output of the engine to reduce turbocharger speeds.
Conditions for Clearing the Fault Code
The ECM will turn off the amber CHECK ENGINE light immediately after the diagnostic runs and passes.
Verify the electronic control module (ECM) calibration is correct. Check the calibration revision history found on QuickServe® Online for applicable fixes to the calibration stored in the ECM. If necessary, recalibrate the ECM. Refer to Procedure 019-032 (ECM Calibration Code) in Section 19 in the corresponding Troubleshooting and Repair Manual for the engine being serviced.
When the engine has taken the necessary action to reduce the turbocharger speed, this fault code is logged. This fault code is for information only and no repairs are necessary. The engine can possibly be derated when operating near the maximum turbocharger speed limits.