BMW 1999-2005 M3 Service Manual page 127

Engine-General
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(ECT) in cylinder head supplies
coolant temperature information to
the ECM.
ECM outputs:
Fuel injector opening duration.
Intake and exhaust valve timing via
the VANOS system.
The radiator cooling fan and the
heated coolant thermostat.
Motor-driven throttle valve: MDK in
MS 42.0 or EDK in MS 43.0.
Idle speed control valve (MS 42.0)
Resonance valve in the intake
manifold.
ECM outputs (cont.):
MS 42.0: Fuel pressure via 3/2 way
valve monitors running losses
(evaporative losses during engine
operation).
Secondary air injection (if
applicable) to reduce HC and CO.
Multiple spark ignition system.
Maximum vehicle speed and cruise
control.
Brake booster vacuum pump.
2/25/2009 9:58 PM