BMW X5 2001 E53 M54 Engine Service Manual

BMW X5 2001 E53 M54 Engine Service Manual X5 2001 E53 BMW BMW https://www.carmanualsonline.info/img/1/5445/w960_5445-0.png BMW X5 2001 E53 M54 Engine Service Manual

Page 41 of 48

BMW X5 2001 E53 M54 Engine Service Manual 41
M54engMS43/ST036/6/20000
RESONANCE/TURBULENCE INTAKE SYSTEM
On  the  M54,  the  intake  manifold  is  split  into  2  groups  of  3  (runners)  which  increases  low
end torque. The intake manifold

Page 42 of 48

BMW X5 2001 E53 M54 Engine Service Manual 42
M54engMS43/ST036/6/2000
RESONANCE SYSTEM
The resonance system provides increased engine torque at low RPM, as well as addition-
al  power  at  high  RPM.    Both  of  these  features  are  obtained

Page 43 of 48

BMW X5 2001 E53 M54 Engine Service Manual 43
M54engMS43/ST036/6/20000
#1 Cylinder Intake Valve open
Low to Mid Range RPM 
(<3750 RPM)

#1 Cylinder Intake Valve closes
#5 Intake Valve Opens     
=> Intake Air Bounce Effect
Low to Mid Ra

Page 44 of 48

BMW X5 2001 E53 M54 Engine Service Manual 44
M54engMS43/ST036/6/2000
#1 Cylinder Intake Valve open -
Intake air drawn from both
resonance tubes.
Mid to High Range RPM 
(>3750 RPM)
#5 Cylinder Intake Valve open -
Intake air drawn from both
res

Page 45 of 48

BMW X5 2001 E53 M54 Engine Service Manual 45
M54engMS43/ST036/6/20000
IDLE SPEED CONTROL
The ECM determines idle speed by controlling an idle speed actuator (dual winding rotary
actuator) ZWD 5.
The basic functions of the idle speed control a

Page 46 of 48

BMW X5 2001 E53 M54 Engine Service Manual 46
M54engMS43/ST036/6/2000
CRUISE CONTROL
Cruise control is integrated into the ECM because of the EDK operation.
Cruise  control  functions  are  activated  directly  by  the  multifunction  steering

Page 47 of 48

BMW X5 2001 E53 M54 Engine Service Manual 47
M54engMS43/ST036/6/20000
PURGE VALVE
The  purge  valve  (TEV)  is  activated  at  10  Hz  by  the  ECM  to  cycle  open,  and  is  sprung
closed. The valve is identical to the purge valve used on t

Page 48 of 48

BMW X5 2001 E53 M54 Engine Service Manual 48
M54engMS43/ST036/6/2000
REVIEW QUESTIONS
1. List the major changes to the Siemens MS 43.3 system from MS 42:
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