Ddec Iv Diagnostic Codes - Detroit Diesel Series 60 EGR Technician Manual

SERIES 60 EGR TECHNICIAN'S MANUAL
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DDEC IV DIAGNOSTIC CODES

This section supports the DDEC IV fault codes/diagnostic trouble codes (DTC) recorded during
EGR engine operation.
The diagnostic trouble codes are generated in the ECM when a condition exists that prevents
the engine from operating at peak efficiency. The DTC will help guide the technician to the
condition. The technician will require a knowledge of the system and proper tools to diagnose
the components.
Three primary codes exist; they are Component, Logic, and Engine Protection.
Logic Codes — This code is activated when specific conditions occur within a given amount of
time that the calibration determines is not "normal." For example: If the ECM commands the
EGR valve to open or close, the ECM monitors the EGR flow devices for confirmation that flow
has begun or ended. Logic codes identify a condition NOT a component.
Component/Sensor Codes — This code is activated when a specific component failure exists.
This is most commonly seen as a high volt or low volt code for a specific device. The failure can
generally be found within the component or wiring for that component.
Engine Protection Codes — This code is activated when a engine operating condition exists
that can cause immediate damage to the engine and the engine should be shut down until the
condition is corrected to prevent additional damage.
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All information subject to change without notice. (Rev. June 2005)
7SE60 0506 Copyright © 2005 DETROIT DIESEL CORPORATION