2001 BMW 540i lock

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I Seat Belts
a
Front seat belt assembly
1. Seat belt buckle
2. Seat belt stop button
3. Seat belt
4. Seat belt height adjuster
5.
6-pillar cross brace
6. Seat belt reel mounting bolt
7. Seat belt anchor mounting bolt
8. Seat belt lock with pyrotechnic
tensioner
9. Tensioner mounting bolt
Front seat belt reel, removing and installing
(sedan and Sport Wagon models)
- Detach battery negative (-) cable in trunk.
~~-~
Prior to disconnecting the battery, read the battery discon-
nection cautions given in
001 General Warnings and Cau-
l tions. I
- Remove front seat as described in 520 Seats
4 Gently pry up front and rear plastic door sill protector strips
to remove.

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720-8
I Seat Belts
When Installing automatic reel housing to 5-pillar, slide tab
into locating slot (arrow).
Remainder of installation is reverse of removal
Tightening torques
- -.
Front seat to floor (M10) 42 Nm (31 ft-lb)
Seat belt to seat 48 Nm (35 ft-lb)
Seat belt to height adjuster 31 Nm
(23 it-lb)
Seat belt reel to €3-pillar bottom 31 Nm (23 ft-lb)
Sliding height adjuster to €3-pillar
24 Nm (18 ft-lb)
Rear seat belt assembly
(sedan)
1. Center shoulder belt reel
assembly
(if equipped)
2. Right shoulder belt lock
3. Lap-belt assembly
4. Left shoulder belt lock
5. Bolt MlO
(tighten to 31 Nm, 23 ft-lb)
6. Left shoulder belt reel assembly
7. Center shoulder belt lock
(if equipped)
8. Bolt M12
(tighten to 48 Nm, 35 ft-lb)

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-- -
Seat Belts
Rear seat belts (sedan)
- Remove rear parcel shelf to access shoulder belt assembly
mounting bolts. See 513 Interior Trim.
- Remove rear seat cushion to access rear seat belt lock
mounting bolts. See 520 Seats.
- When installing seat belt lock straps:
Install right lock strap (which is shorter) underneath middle
lock strap.
Install left lock strap underneath middle lap belt strap.
Metal strap ends must rest against stop on floor under-
neath seat.
Rear seat belt assembly
(Sport Wagon)
1. BoltMlO
(tighten to 31 Nm, 23 ft-lb)
2. Right shoulder belt reel
assembly
3. Center belt lock
4. Right belt lock
5. Left belt lock
6. Center shoulder belt reel
assembly
7. Left shoulder belt reel assembly
8. Bolt
MI2
(tighten to 48 Nm, 35 ft-lb)

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720-1 0
Seat Belts
Rear seat belts (Sport Wagon)
- Center shoulder belt:
Remove shoulder belt guide trim at top of seat backrest.
Feed belt out through slot in trim. Working in cargo com-
partment, partially remove backrest cover to access shoul-
der belt reel.
Remove shoulder belt reel mounting bolt inside backrest.
- Outboard shoulder belt:
Remove roof-pillar (C-pillar) trim.
Remove center shoulder belt.
- Lift up rear seat cushion(s) to access rear seat belt loclc
mounting
bolt(s).
- When installing seat belt loclc straps:
Install right belt loclc strap (which is shorter) underneath
center belt lock strap.
Install left belt loclc strap underneath center lap belt strap.
- Metal strap ends must rest against stop on floor underneath
seat.

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721 -9
Airbaq System ~SRS)~
4 Sport steering wheel:
Insert screwdriver through opening in rear of steering
wheel and push against spring tension to release
airbag
unit lock.
Repeat procedure on other side of steering wheel.
Lift off
airbag unit and detach electrical harness connec-
tors.
WARNING-
Store the removedairbag unit with the horn pad facing up.
If stored facing down, accidental deployment could propel
it violently into the air, causing injury.
Once an
airbag is removed, the car must not be driven.
Do not connect the battery with the
airbag disconnect-
ed. A fault code will be stored, setting off the
airbag in-
dicator light Special tools are needed to reset the fault
memory
Once the
airbag unit is installed and all other service
procedures have been completed, start the engine and
check that the
airbag indicator light goes out. If the in-
dicator light stays on, the
airbag system will not func-
tion as designed. Have the system diagnosed and
repaired by an authorized
BMW dealer.
- Installation is reverse of removal.
MFL steering wheel: Torque airbag using specification list-
ed below.
- Sport steering wheel: Press airbag unit mounting pins into
spring
loclts in steering wheel until they snap in firmly.
CAUTION--
Do notpinch airbag harness in center of steering wheel when
installino
airbaa.
Tightening torque
Airbao to steerino wheel IMFL) 8 Nm (71 in-lb)
Passenger airbag, removing and installing
- Disconnect negative (-) cable from battery and cover nega-
tive terminal with insulating material.
--
WARNING -
After disconnecting the batteg wait 5 seconds before begin-
nina work on airbaa components.
Prior to disconnecting the battery, read the battery discon-
nection cautionsgiven in001 General Warnings and
Cau-

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721 -1 1
Airbag System (SRS)~
Front door airbag:
Remove airbag mounting bolts (arrows).
Disconnect electrical harness connector.
CAUTIOI\C
When removing andinstalling the airbag unit, pay attention to
the routing
of the electrical harness to avoid kinks or breaks
in the wire.
Installation is reverse of removal,
Rear door
airbag:
Detach electrical harness connector.
Remove mounting bolts and remove
airbag from door.
- Installation is reverse of removal.
Route electrical harnesses as they were before.
Use new wire ties as necessary.
Use new self-locking mounting bolts.
Tightening
torque
Side-impact airbag to door 8.5 Nm (75 in-lb)
Head protection airbag
components
1. B-pillar deflection plate
2. Head protection airbag
3. Cable holder
4. Gas generator

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OBD-12
On-Board Diagnostics
Automatic transmission diagnostic trouble codes (continued)
P-code
PI747
PI747
PI 747
PI748
PI748 I I
PI748
PI748
PI748
PI 748
PI 749
PI 750
P1750
PI761
PI761
BMW-FC
150
151
156
15
80
-- PI762
PI763
PI764
PI765
PI765
PI765
P1770
DTC Definition
CAN-BUS Monitoring
CAN-Bus Monitoring
CAN-Bus Monitoring
Transmission Control Module Self-Test
Transmission
Control Module Self-Test
PI748 182 l~ransmission Control Module Self-Test
81
103
105
110
I I
Transmission Control Module Self-Test
Transmission Control Module Self-Test
Transmission Control Module Self-Test
Transmission Control Module Self-Test
19
19
19
147
154
158
146
PI 790
PI791
P1792
PI 794
PI 801
P1802
PI 803
PI 831 Shiftiock Solenoid High input
Shiftlock Solenoid
Low Input
Shiftlock Solenoid Open Circuit
CAN Throttle Valve
CAN Throttle Valve
CAN Throttle Valve
CAN
Torpue Interlace
CAN Torque Reduction
PI 780
I I -
108
54
96
2 19
PI 780 1163 ICAN Torque Reduction
152
80
81
82
80
16
17 18
1 Secondary Pressure Solenoid Communication Error
(M52: Internal
Transmission Control Module Memory Error)
Secondary Pressure Solenoid Circuit
Rangelperformance (System Voltage Input Low)
Secondary Pressure Solenoid Circuit
RangeIPerformance (System Voltage Input Low)
Shiftioclc Solenoid
Shiftiocic Solenoid
internal Transmission Control Module Memory ChecksumlEPROM Error
internal Transmission Control Module Memory
ChecksumIEEPROM Error
internal Transmission Control Module Watchdog Error
internal Transmission Control Module Memory Checksum Error
Shift Solenoid
'A' Low Input
Shift Solenoid
'8' Low Input
Shift Solenoid
'C' Low input
Pressure Control Solenoid
'A' Circuit High
Pressure Control Solenoid 'B' Circuit High
PI832
PI833 13 IPressure Control Solenoid 'C' Circuit High
2

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INDEX 'tl
WARNING
Your common sense, good
judgemenl, and general alertness are
crucial to sale and successiul service
worlr. Belore attempting any work on
your
BMM be sure lo read 001
General Warnings and Cautions
and the
copyriglll page at the front 01
the manual. Review these warnings
and
caulions each lime you prepare
lo work on your BMW. Please also
read any warnings and cautions that
accompany
tile procedures in the
manual.
312-way valve (running losses)
see Fuel tank
Abbreviations, commonly used 600-14
ABS (antilock brake system)
see
Bral(es
A/C air distribution motors
see stepper motors (below)
blower final stage (resistor pack),
replacing
640-16
blower, removinglinslalling
640-1 5
compressor, replacing
640-24 condenser, replacing 64045
control panellmodule, removing1
installing
640-1 1
evaporakr, removinglinstalling 640-29
evaporator temperature sensor
640-12 expansion valve, removinglinstailing
640-27
IHKA/ IHKR system description 640-5
receiveridrier, replacing 640-26
stepper motors 640-1 3 ventilation microiilter, replacing
020-22. 640-17
see also Heating
Accelerator
iinlcage
see Maintenance
Activated carbon canister
see Fuel tank
ADS (auxiliary throttle valve)
130-57
Air compressor
330-44
Air conditioning
see
AIC
Air distribution (flap) motors
seeNC, stepper motors
Air filter see Maintenance
Air spring
300-6, 330-12
Airbag system (SRS)
2-stage
airbag 721-4
control module, replacing 721-7 driver airbag, removinglinstalling
721-8
iiead protection airbag 721-12 components 721-1 1
indicator
lighl721-4
passenger airbag, removinglinstalling
721-9 side-impact airbags crash sensor,
replacing
721-7
Airflow sensor see 130 under appropriate
fuel
injection system
Air pump
see 130 under appropriate fuel
injection system, secondary air
injection system
Air suspension
see Electronic height control
(EHC)
Alarm
see Anti-theft alarm
Alignment see
Wheei alignment
Aluminum suspension components
300-2
Antenna 650-6
Alternator see Battery, starter, alte rnator
Amplifier
650-4
Anti-theft alarm (DWA)
515-24 emergency disarming 515-31
Antifreeze (engine coolant)
see Maintenance
see also Cooling system
Antilock brake system (ABS) see Brakes
ASC see Brakes
ATF (automatic transmission fluid)
see Automatic transmission
see also Cooling systern
Automatic headlight adjustmenl
(LWR) see Lights
Automatic seat belt tensioner
720-4
Automatic shiftloclc
see
Gearshift
Automatic transmission
applications
200-3, 240-4
ATF 020-10, 200-4
capacity 240-8 checking 240-6
drainingifilling 240-7
heat exchanger 170-5
fluid pan and strainer 240-9 gearshift
see Gearshift
ID tag
200-3 range switch 610-6
removaliinstallation 240-10
steptronic see Gearshift
Auxiliary cooling fan
see
Coollng system, electric Ian
Auxiliary throttle valve (ADS)
130-57
Axle joint
see Drive axle
Back-up light switch
automatic transmission see Automatic transmission. range switch
- .~.~~~
manual transmission 230-8 -
- I