Internal exhaust gas recirculation, IEGR, is like the
name says used for recirculation of exhaust gases.
This for lowering the emissions from the engine. The
IEGR control valve, is located on the cylinder head
under the valve cover. It is used to regulate the oil
the rocker arm shaft and from there to the
IEGR double rocker. The IEGR valve is a 2-way sole-
noid valve controlled by the engine control unit. When
the IEGR not activated an oil pressure on one side of
the solenoid and the solenoid spring force on the other
side of the solenoid keeps the solenoid in balance.
When the IEGR function is activated the solenoid
changes position and the oil pressure to the rocker arm
shaft increases. The solenoid is activated when pin 30
in connector B changes its potential.
Checking IEGR wiring page 177
Checking IEGR coil page 171
Checking IEGR solenoid page 172
a Connector B
30-2 Fault Tracing
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