CODES
Failure Mode
:
SID147, FMI 2 — 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
:
VNT vanes/actuator mechanical failure
Turbocharger failure (e.g. damaged or defective compressor/turbine wheel)
Low vehicle air pressure supply
Restricted air inlet (including filter)
Low fuel pressure (e.g. restricted fuel supply)
Exhaust manifold leakage
Leaking delivery pipe
Defective or leaking VPOD
Leaking air system
Charge air cooler
Hoses
Loose hose clamps
4-10
All information subject to change without notice.
(Rev. April 2004)
7SE60 0404
Copyright © 2004 DETROIT DIESEL CORPORATION