Low Or High Boost-Boost Mode/Vnt Vanes Not Responding-Boost Power; Excessive Egr Flow-Egr Mode/Vnt Vanes Not Responding-Egr Mode - Detroit Diesel Series 60 EGR Technician Manual

DDEC IV DIAGNOSTIC CODES
Failure Mode: SID147, FMI 2 — Low or High Boost-Boost Mode/VNT Vanes Not
Responding-Boost Power
Indicates: Low boost or high boost.
SID147, FMI 2 will be set by the ECM if, the signal from the manifold pressure sensor indicates
"Actual Boost" is above "Desired Boost" OR "Actual Boost" is below "Minimum Boost" when
the ECM is in "Boost Mode" for a period greater than 50 seconds.
Response: The CEL will illuminate and a fault message will be generated.
Possible Causes:
Defective VPOD
Delivery pipe leakage
Exhaust system (manifold) leakage
Leaks in charge cooler system (CAC, hoses, tubes, or clamps)
Leaking or low air supply to VPOD
Low fuel pressure
Mechanical failure, turbocharger actuator
Mechanical failure, VNT vane set
Restricted air intake including air filter
Failure Mode: SID 147, FMI 7 — Excessive EGR Flow-EGR Mode/VNT Vanes Not
Responding-EGR Mode
Indicates: EGR flow requested by DDEC and excessive EGR flow detected.
SID 147, FMI 7 will be set by the ECM if, the signal from the Delta P sensor and EGR temperature
sensor indicate EGR flow is above a desired flow for a period greater than 50 seconds.
Response: The CEL will be illuminated and the system will be forced into "Boost Mode" (EGR is
Disabled) for the remainder of the ignition cycle.
Possible Causes:
Defective or leaking VPOD
Delta P sensor system measurement incorrect
Mechanical failure, EGR valve
Mechanical failure, turbocharger actuator
Mechanical failure, VNT vane set
4-8
All information subject to change without notice. (Rev. June 2005)
7SE60 0506 Copyright © 2005 DETROIT DIESEL CORPORATION