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Fuel Injection I
- As an alternative, harness connector housing can be sepa-
rated so that electrical
checlts can be made from backof con-
nector.
4 If replacing ECM, disconnect control module harness con-
nector (arrow) by releasing fastener and pivoting connector
up and
off ECM.
CAUTION-
Be sure ignition is OFF before disconnecting or reconnecting
DME system components.
- Remove ECM from retaining brackets and lift off holder.
- Installation is reverse of removal.
- Before attempting to start engine, use BMW service tester
DISplus, MoDiC, GTI or equivalent:
- Code replacement ECM with application information (i.e.
engine code, transmission type, etc.).
Align ECM to EWS (electronic immobilizer).
Siemens MS 41.1 ECM pin assignments
ECM pin assignments are given in Table b. For engine man-
agement system schematics, see ELE Electrical Wiring
Di-
agrams.
CAUTION-
a Always wait at least one minute after turning off the ignition
before removing the connector from the
ECM. If the con-
nector is removed before this time, residual power
in the
system relay may damage the
ECM.
Always connect or disconnect the control module con-
nector and meter probes with the ignition
off
When malting checks at the ECM itself, a breakout box
should be used to allow tests to be made with the connector
attached to the ECM. This also prevents damage to the small
terminals in the connector. As an alternative, the harness
connector housing can be separated so that electrical checlts
can be made from the back of the connector.
Table b. Siemens MS
41.1 ECM pin assignments
Pin
1
2
3
4
Signal
output
output
output
qround Componenfffunction
Ignition coil control, cyl. 2
Ignition coil control, cyl. 4
ignition coil control, cyl. 6
Ground Notes
Primary signal,
ignition
coil 2
Primary signal, ignition coil 4
Primary signal, ignition coil 6
Ground
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130-38
Fuel Injection
Throttle cable, adjusting
(MS 42.0)
The throttle assembly on MS 42.0 cars uses a throttle cable.
The cable should be adjusted any time it is disconnected or
replaced. This procedure requires the factory scan tool or an
equivalent to read and adjust throttle angle. It is recommend-
ed the procedure be done by an authorized
BMW dealer ser-
vice department
Basic adjustment:
Ensure that at idle (accelerator pedal in rest position) throt-
tle cable has detectable play at throttle lever attaching
point. Play must not exceed maximum allowable.
Adjust by turning knurled adjuster
(arrow) on end of throt-
tle cable sheath at throttle housing.
NOTE-
Faulty throttle adjustment values must be reset using the
BMW service tester
DISplus, MoDiC, GTI or equivalent.
Max.
play at throttle plate lever
ldle speed control valve,
checking and replacing
3 mm (0.125 in)
The Idle speed control valve regulates Idle speed by red~rect-
ing air around the throttle valve. The ldle speed control valve
is mounted
d~rectly above the throttle housing. Accessing the
valve is best accomplished by
flrst removing the air fllter
housing and associated ducting.
Thevalve is supplied with batteryvoltage from the ECM relay.
The idle speed control valve incorporates a two-coil rotary ac-
tuator. The ground sides of each coil are pulsed simulta-
neously by the ECM. The duty cycle of each circuit is varied to
achieve the required idle speed.
A faulty idle speed control valve sets a fault code and the MIL
is illuminated when
OED II fault criteria are exceeded.
Before checking the idle speed control valve, confirm that the
throttle position sensor is working correctly.
- With engine running, check that idle speed control valve is
buzzing.
- Turn on AIC system or shift transmission into drive. ldle
should remain steady or increase slightly.
- If idle speed valve is not buzzing, or if idle decreases when
AIC is turned on, stop engine and disconnect harness con-
nector from idle speed valve.
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.. - -
I Radiator and Cooling System
I I 4 The cooling cassette incorporates cooling coils for various
vehicle systems:
1. Steering fluid cooler
2. Transmission oil
coolel
3. AIC condenser
4 In V-8 cars produced after 911998 (M62 TU engine), the en-
gine radiator is divided into an upper chamber (about 80%)
and a lower chamber (about 20%). The ATF heat exchanger
is coupled to the lower chamber.
On cold engine start-up, the engine coolant is heated more
quicltly than the transmission fluid. Heat from engine coolant
is used to warm up the ATF faster, reducing drag in the trans-
mission and improving fuel mileage.
Once the ATF has reached normal operating temperature,
the ATF heat exchanger acts as cooling device. The lower
20% of the radiator
stays cooler than the upper chamber, so
the ATF is cooled more effectively.
4 M62 TU cooling system ducting at radiator:
1. Coolant distribution housing connection
2. Thermostat connection
3. Water cooled alternator connections
4. Transmission fluid heat exchanger connections
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The lubricant used varies, depending on transmission and
model year. Fluid application information is clearly marked on
a label on transmission.
On manual transmission, either ATF (orange label reads
ATF-Oil) or a special BMW lubricant (yellow label reads MTF-
LT
I) is used. See 230 Manual Transmission.
Automatic transmission is filled with either Dexron
Ill ATF
(black transmission ID plate reads ATF-Oil), or special life-
time oil (green transmission ID plate reads Life-Time Oil). See
240 Automatic Transmission.
CAUTION--
If in doubt as to the type of fluid installed in a particular trans-
mission, consult an authorized
BMW dealer service depari-
ment for the latest in operating fluids.
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Anach pressure brake bleeder to fluid reservoir and pump
bleeder a few times to pressurize hydraulic fluid system.
CAUTION-
* Do not exceed 2 bar (29 psi) pressure at the fluid resenfoil
when bleeding or flushing the hydraulic system.
Brake fluid is poisonous, highly corrosive and danger-
ous to the environment. Wear safety glasses and
rub-
bergloves when working with brake fluid. Do not siphon
brale fluid with your mouth. Immediately clean away
any fluid spilled on painted surfaces and wash with wa-
ter, as brale fluid will remove paint.
Always use new brake fluid from a fresh, unopened
container.
Brake fluid will absorb moisture from the air.
This can lead to corrosion problems in the clutch and
brake hydraulic systems, ;nd will also lower the brake
fluid boiling point. Dispose of brale fluid properly.
- Raise and safely support vehicle.
WARNING-
Make sure the car is stable and well supported at all times.
Use a professional automotive lift orjackstands designed for
the purpose. A floor
iack is not adequate support.
- If necessary, remove transmission splash shield.
Hydraulic system, bleeding
Worlting underneath transmission, connect a hose from
clutch slave cylinder bleeder valve
(arrow) to a container.
Open bleeder valve and allow bralte fluid to expel until
clean fluid comes out, free of air bubbles.
Close bleeder valve and disconnect pressure bleeding
equipment from fluid reservoir.
Slowly operate clutch pedal about
10 times. Fill reservoir
with clean fluid as necessary.
CR* .,,, .rP,ll,h.:I,,~,~mn.lI","i,,i"
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- Raise and safely support vehicle
WARNING-
Make sure the car is stable and well supporied at all times.
Use a professional automotive /iff orjack stands designed for
the
ournose. A floor jack is not adeouate suooort.
- If necessary, remove transmission splash shield.
- Disconnect fluid line from slave cylinder on lefl side of trans-
mission. Place pan under hose to catch dripping fluid.
4 Working underneath transmission, remove slave cylinder
mounting nuts (arrow) from clutch housing and remove
cylinder.
- Installation is reverse of removal, noting the following:
Check for wear on slave cylinder. Any wear except on tip is
caused by misalignment of clutch components.
Lightly coat
pushrod tip with molybdenum disulfide grease
(MolyltoteIB Longterm or equivalent).
. During installation be sure pushrod tip engages recess in
clutch release lever.
Fill fluid reservoir with clean fluid.
. Bleed clutch hydraulics as described earlier.
Tightening
toraues - -.
Clutch slave cylinder to transmission 22 Nm (16 R-lb)
Fluid line to slave cylinder 17 Nm (13 ft-lb)
The transmission must be removed from the engine to access
the clutch mechanical components. It is recommended that
the clutch disc, pressure plate and release bearing be re-
placed during a clutch overhaul.
Besure tocheck the bottom of the bellhousing foroil. If engine
oil is found, check for a faulty rear crankshaft main oil seal.
See
119 Lubrication for rear main seal replacement.
Clutch variations
Two versions of the clutch are used:
1997 528i (6 cylinder) uses traditional clutch components.
All
540i (V-8) and 1998 and later 6 cylinder models from
use a self-adjusting clutch (SAC).
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21 0-1 6
Clutch
4 Press new bearing into place using BMW special tool
11 2 350 or equivalent driver.
Clutch, installing (non-SAC)
CAUTIOG
Avoidcontaminating clutch friction surfaces with oilorgrease.
Do not touch these surfaces.
4 Center clutch disc on flywheel using centering tool
Clutch Clutch pressure disc plate
Dual mass flywheel -
5-speed transmission: Special tool 21 2 130
- Install flywheel lock, BMW special tool 11 2 170.
4 Install pressure plate and clutch disc to flywheel. Install and
tighten bolts hand-tight.
CAUTIOG
Be sure clutch disc is facing the correct way The disc should
be
marked 'kngine side" or "transmission side':
- Tighten each clutch bolt one turn at a time until pressure
plate is fully seated. Torque to specification.
Tightening torques
Clutch to flywheel
. M8 (8.8 grade) 24 Nrn (18
ft-lb)
- M8 (10.9 grade) 34 Nrn (25 ft-lb)
- Remove clutch disc centering tool.
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Clutch
- Remove flywheel locking tool
4 Inspect and clean release bearing lever. Apply a thin coat of
grease to release bearing lever lubrication points. Install re-
lease bearing. Bearing tabs
(A) align with contact points (B)
on release lever.
CAUTION-
Do not grease release bearing guide sleeve. If guide sleeve
is greased, release bearing may stick to it.
- Clean and lightly lubricate clutch disc splines and transmis-
sion input shaft splines.
- Install transmission. See 230 Manual Transmission
.
Transmission to engine
MB (Torx) 22 Nm (16 fl-lb)
MlO(Torx) 43 Nm (32 fl-lb)
Clutch, installing (new SAC components)
V-8 models and 1998 and later 6 cylinder models are
equipped with the self-adjusting clutch (SAC) pressure plate.
The SAC pressure plate, when new, comes from the factory
with a lock plate at the center which maintains spring tension
on the self-adjusting springs. This
loclting ring must not be re-
moved until the pressure plate is securely installed on tlie fly-
wheel with the clutch disk in place.
CAUTION-
Avoidcontaminating clutch friction surfaces with oilorgrease.
Do not touch these surfaces.
< Center clutch disc on flywheel using centering tool.
5-speed transmission: Special tool 21 2
142
- 6-speed transmission: Special tool 21 2 141
G6S-3782 transmission: Special tool 21 2 201
CAUTION-
Be sure clutch disc is facing the correct way The disc should
be marked "engine side" or "transmission side':
The large bolt in the clutch disc centering tool is used to
in-
stalland remove the tool only. Once the disc is in place on the
eel, remove the bolt to male room for tlie
SACpressure