Ford Transit 2002 Owner's Manual page 1105

Engine Emission Control - 1.8L Duratorq-
TDCi (Lynx) Diesel/1.8L Duratorq-TDDi
(Lynx) Diesel - Engine Emission Control—
75 PS/90 PS, Vehicles Built From:
08/2006
Diagnosis and Testing
General Equipment
Ford approved diagnostic tool
Principles of Operation
Exhaust Gas Recirculation (EGR) system
To maintain the standards of low exhaust emission levels required, the EGR system is fully
electronically controlled.
The EGR valve is a proportional electric motor controlled directly by a duty-cycle signal
from the powertrain control module (PCM). Integrated into the EGR valve is a valve position
sensor. The signal from the EGR valve position sensor allows for the precise control of the
timing and the quantity of exhaust gas to be recirculated. If the EGR valve becomes
inoperative or fails to close completely, the PCM will raise a diagnostic trouble code (DTC)
and the instrument cluster malfunction indicator lamp (MIL) will be illuminated.
The EGR system is fitted with an EGR cooler. The EGR cooler reduces the temperature of
the exhaust gasses being returned to the intake system. By reducing the EGR temperature,
the intake air charge density is not adversely affected, so maintaining the optimum fuelling
characteristics.
Positive Crankcase Ventilation (PCV) system
Item Part Number
1 -
2 -
3 -
4 -
5 -
Description
PCV valve cover
PCV valve diaphragm
PCV valve bush
PCV valve spring
Valve cover
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Transit/Tourneo Connect 2002.5 (06/2002-)
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