Volvo Workshop Manuals
XC90 AWD V8-4.4L VIN 85 B8444S (2005)
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 1785
A: Exhaust camshaft
Oil pressure from the lubrication system (1) of the engine.
The oil passes the filter for the camshaft reset valve (2) and then on to the reset valve (3).
The engine control module (ECM) controls the oil flow to one of the CVVT unit chambers (4) depending on whether it is to be deployed/returned
The reset valve is controlled by the engine control module (ECM) by high frequency, switching for deployment and return. This results in rapid and
Controlling the generator
The engine control module (ECM) (4/46) regulates the charge voltage of the generator (GEN) (6/26) (via LIN communication) when requested by the
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