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 1775
The function of the injectors is to spray fuel into the cylinders in the correct spray patterns. This happens sequentially.
The ignition coils supply the spark plugs with high voltage to produce sparks. The engine control module (ECM) controls the ignition coils so that sparks
Camshaft reset valve (Continuous variable valve timing (CVVT))
The camshaft reset valve controls the oil flow to the CVVT unit (camshaft pulley).
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