Volvo Workshop Manuals
XC90 FWD L6-3.2L VIN 98 B6324S (2007)
Relays and Modules > Relays and Modules - Powertrain Management > Relays and Modules - Computers and Control Systems > Engine Control Module > Component Information > Description and Operation > System Overview > Page 2019
Controlling the generator
The engine control module (ECM) (4/46) regulates the charge voltage of the alternator (GEN) (6/26) (via LIN communication) when requested by the
Variable intake system
Today's modern car engines often utilize systems with variable length of the intake manifolds.
Actuator variable intake manifold, upper (6/139)
Actuator variable intake manifold, lower (6/140)
The primary throttle is activated at engine speed over approx. 4800 rpm and the secondary throttle is activated between approx. 3800 rpm and 4800 rpm
Different throttle combinations:
Position 1: Both throttles are closed at engine speeds lower than approx. 3800 rpm.
Position 2: The secondary throttle opens at approx. 3800 rpm and this shortens the length some more.
Position 3: Both throttles are fully open to minimize the length at higher engine speeds (over 4800 rpm).
The valve for variable intake is controlled by the engine control module (ECM) (4/46).
Variable camshaft profile (CPS)
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