XC90 AWD V8-4.4L VIN 85 B8444S (2005)
The valve for variable intake controls the vacuum motor for the damper in the variable intake manifold.
The valve consists of an electro-magnetic valve which controls the air flow between the vacuum tank and the vacuum valve for the damper in the
variable intake manifold.
The valve is supplied with voltage from the system relay via fuse and ground (control) internally in the engine control module (ECM). Also see:
Function, B8444S See: Powertrain Management/Computers and Control Systems/Description and Operation/Engine Control Module (ECM)/Function
The valve for variable intake can be diagnosed by the engine control module (ECM).
The valve for variable intake is on the right-hand side of the engine beside the intake manifold.
Emissions warning lamp
The emissions warning lamp in the Driver Information Module (DIM) has a warning symbol. This warning symbol varies depending on the market. The
warning symbols are:
"Engine symbol" (not USA)
"CHECK ENGINE" (MIL - Malfunction Indicator Lamp, USA only).
The warning lamp lights when the ignition key is turned to position II. The warning lamp will go out after approximately 15 seconds or if the engine is
started when no fault is found in the engine management system.
If Readiness is not complete (certain diagnostic functions not completed), the warning lamp will flash instead of going out when the ignition key is in
The warning lamp will light if there is a fault in one of the parameters in the engine management system. The warning lamp will also light in response to
a request transmitted via the control area network (CAN) if there is a fault in the transmission control module (TCM) which affects emissions.
Electronic throttle unit