Size: 25mb
Language: English
Type: pdf
Introduction
This Service Bulletin provides advanced techniques for troubleshooting engine performance complaints such as low power, poor acceleration, and engine derates. A derate is defined as any condition where the electronic control module (ECM) intentionally reduces power output to protect the engine from damage. A simple example of a derate would be when the ECM detects high coolant temperature. The ECM will derate, or reduce, the torque output to protect the engine from damage. Sometimes these derates do not log fault codes, making performance complaints difficult to troubleshoot.
INSITE™ electronic service tool has provided a monitor parameter called “User Fueling State” for all engine applications released since 1995. This monitor parameter may also be called “Engine Operating State” on newer engine applications. This parameter indicates, in real-time, what governor, system, or derate is presently controlling the engine, and can be monitored using INSITE™ electronic service tool Data Monitor/Logger feature. Many of the parameters indicate normal operation, but others can help isolate causes of poor engine performance.
This qualification course is designed for OEM dealer technicians who need warranty repair qualification. Upon successful completion of this qualification path they will be full service qualified on the 2010 ISX15 automotive product. This aggressive troubleshooting and repair class will cover: engine systems, CM2250 aftertreatment, Selective Catalytic Reduction and Diesel Exhaust Fluid, high pressure common rail fuel system troubleshooting and engine control systems diagnostics.
Background / Technical Description
Vehicles are being brought into the shop for service due to excessive coolant usage, white smoke, coolant found in the oil, Amber Check Engine light on, Red Stop Engine light on, or visible coolant or oil leaks.
There are a number of different FC’s that can be active or inactive due to Coolant in the Exhaust system and the Lubricating Oil system.
When Technicians troubleshoot, they are often lead to a leaking EGR Cooler.
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