BMW E46 Convertible 2000 Manual
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BMW E46 Convertible 2000 Manual

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Subject
System Components
Top and Frame ..................................................................................
Hydraulic Unit ....................................................................................
Hydraulic Cylinders ............................................................................
Hydraulic Solenoids ...........................................................................
Storage Cover Motor ......................................................................... 10
Windshield Frame Lock Assembly ..................................................... 11
Top Switch ........................................................................................ 12
Hall Sensors ...................................................................................... 13
Angle Hall Sensors ............................................................................ 19
Compartment Floor Micro Switch ...................................................... 20
System Operation ................................................................................... 23
Emergency Operation ............................................................................. 28
Comfort Operation .................................................................................. 29
Workshop Hints ...................................................................................... 35
Roll Over Protection System ................................................................... 40
Components...................................................................................... 42
Roll Over Sensor ............................................................................... 44
Initial Print Date: 02/2000
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......................................................................................... 22
......................................................................................... 30
......................................................................................... 33
......................................................................................... 47
Revision Date: 03/21/00
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  • Page 1: Table Of Contents

    Table of Contents Subject Page Introduction ..................System Components Top and Frame ................................... Hydraulic Unit ..................Hydraulic Cylinders ................Hydraulic Solenoids ................Storage Cover Motor ................. 10 Windshield Frame Lock Assembly ............. 11 Top Switch ..................12 Hall Sensors ..................13 Angle Hall Sensors ................
  • Page 2 BODY Convertible Top Model: E46 Convertible Production Date: 01/00 Objectives of the Module: After completing this module, you should be able to: • Describe the lowering and raising sequence of the Convertible soft top in details. • Name all the sensors and their functions that are used to open or close the soft top. •...

  • Page 3: Introduction

    INTRODUCTION Purpose of the System: The E46 Convertible-top is a fully automatic electro-hydraulic system that completely opens and closes the soft-top using hydraulic cylinders and electric motors. It consist of the con- vertible module (CVM II) which controls and monitors the complete operation of the system. The CVM II interacts with the General Module which controls the operation the convertible- top storage compartment cover and window operation when lowering or raising the soft- top.

  • Page 4: Top And Frame

    Components of the System: Top and Frame The top frame is similar to the E36iC with modifications for the adoption of the hydraulic cylinders used for raising/lowering the top. The unlock motor and gear drive assemblies are attached to the front of the top frame as on the E36iC. The convertible top consists of three layers: •...

  • Page 5: Cvm Ii

    Convertible-Top Module (CVM II) The convertible-top module (CVM II) is installed in the left rear quarter panel behind the inte- rior trim panel. It contains the processing, controlling and monitoring electronics for the complete top operation. The CVM II communicates with the GM over the K-Bus for opera- tion of the top storage cover and windows.

  • Page 6: Hydraulic Unit

    Hydraulic Unit The hydraulic unit is mounted in the trunk on the left side behind the trim cover. It is mount- ed on a rubber bushing and covered by sound insulation for noise reduction during pump operation. The hydraulic unit consists of: •...

  • Page 7: Hydraulic Cylinders

    Hydraulic Cylinders Top Storage Compartment Cover Two hydraulic cylinders are positioned on the left and right sides in the trunk for opening and closing the top storage compartment cover. A Hall sensor is positioned on the left cylinder to detect the full opened position of the cover. Cylinder Removed Cylinder Installed Hall Sensor...
  • Page 8 Main Pillar Two hydraulic cylinders are positioned on the left and right sides of the top frame linkage for raising and lowering the soft top frame. An angle hall sensor is used to detect the posi- tioning of the main top linkage. The hydraulic lines for the right side main pillar cylinder are routed under the top fabric along the tension bow.

  • Page 9: Hydraulic Solenoids

    Hydraulic Solenoids Two hydraulic solenoids are mounted on the hydraulic unit: • One solenoid valve controls the opening and closing of the storage compartment cover • The second solenoid valve is the drain solenoid for relieving pressure in the hydraulic cylinders when the key is switched off.

  • Page 10: Storage Cover Motor

    Storage Compartment Cover Lock Motor The storage compartment cover lock motor is located on the drive shaft tunnel under the rear seat. It consists of the motor with hall sensor, gear linkage assembly and two bowden cables. Two locks are located on the right and left sides for locking the storage compart- ment cover.

  • Page 11: Windshield Frame Lock Assembly

    Windshield Frame Lock Assembly The windshield frame lock assembly consists of the top lock motor positioned in the cen- ter of the top frame and two lock drive mechanisms positioned on the left and right sides of the top frame. The operation of the lock motor and drive mechanisms is similar to the E36 fully automatic top system.

  • Page 12: Top Switch

    Convertible-Top Switch The convertible-top switch assembly is located in the center console below the IHKA con- trol panel. There are two push button switches, one for each direction of travel, that pro- vide a ground input signal to the CVM for top operation. Two LEDs are positioned in the center of the switch.

  • Page 13: Hall Sensors

    Sensors and Switches The hall sensors, angle hall sensors and micro switches provide feedback status to the CVM and GM for soft top positioning and top sequencing during operation. Hall sensors: • Cowl Lock hall sensor • Tension Point hall sensor •...
  • Page 14 Cowl Lock and Tension Point Hall Sensors Two hall sensor switches are installed on the left side top lock drive assembly. Both sen- sors receive power and ground from the CVM. One switch is the soft top locked to the windshield frame input (cowl lock).
  • Page 15 Storage Compartment Cover Lock Hall Sensors There are two storage compartment cover lock hall sensor switches, one mounted on each storage cover lock. The switches receive power and ground from the CVM. Each switch input provides a high signal when the cover is unlocked and the cover is raised by the hydraulic cylinders far enough to clear the latches.
  • Page 16 Storage Compartment Cover Hall Sensor The storage cover hall sensor switch is mounted on the left side storage cover hydraulic cylinder in the trunk. It receives power and ground from the CVM. The switch provides a high signal input when the storage cover is fully open. The CVM uses the signal from the switch for top cover positioning and switching operation during soft top lowering and raising.
  • Page 17 Storage Compartment Cover Motor Hall Sensor The storage cover motor hall sensor is mounted on the gear drive assembly of the motor. It receives power and ground from the general module and provides a high signal input when the motor has unlocked or locked the storage cover. The GM uses this input to switch the unlock motor OFF.
  • Page 18 Hard Top Lock Hall Sensor The hard top installed hall sensor is positioned on the left hard top lock. It receives power and ground from the CVM and provides a high signal input when the hard top is installed on the vehicle. The connector on the top of the lock is used as the power and ground sup- ply for the rear window defroster of the hard top.

  • Page 19: Angle Hall Sensors

    Angle Hall Sensor - Tension Bow The angle sensor for the tension bow is mounted on the left side of the top linkage by the tension bow hydraulic cylinder. The angle sensor receives power (5 volts) and ground from the CVM. It provides a linear voltage signal input from approximately 0.5 to 3.5 volts as the tension bow moves from a vertical to horizontal position.
  • Page 20 Angle Hall Sensor - Main Pillar The angle sensor for the main pillar is mounted on the left side top linkage by the left main pillar hydraulic cylinder. The angle sensor receives power (5 volts) and ground from the CVM. It provides a linear voltage signal input from approximately 0.5 to 3.5 volts as the top frame is lowered into and raised out of the storage compartment.

  • Page 21: Compartment Floor Micro Switch

    Storage Compartment Floor Micro-Switch The storage compartment floor micro-switch is installed on the hinge of the compartment floor on the right side. It provides a high/low input signal to the CVM based on the posi- tion of the compartment floor. When the floor is in the raised position, the soft top operation is locked out.

  • Page 22: I P O

    CVM I P O ART-E46ICEHYDD.EPS E46iCCVM/ST039/3/21/00...

  • Page 23: System Operation

    System Operation Pre-Conditions for Soft Top Operation • Ignition Key in position “R” - (Except for comfort operation) • Road Speed < 2.5 MPH • Hydraulic unit temperature < 95 degrees • Trunk Lid closed • Top storage compartment floor in lower position with top raised •...
  • Page 24 • CVM activates hydraulic pump and switches the tension bow solenoid to raise the ten- sion bow. • Tension bow is raised to its vertical position - signal from angle hall sensor • CVM signals GM to unlock storage compartment cover. •...
  • Page 25 • CVM switches solenoid for top cover - cover is lowered - signal from storage cover lock hall sensors. • CVM signals GM to lock storage compartment cover. • GM activates cover lock motor - cover is pulled closed by lock assemblies. •...
  • Page 26 Hydraulic System Operation The pump in the hydraulic unit is energized by the CVM and supplies hydraulic fluid under pressure to the solenoids mounted on the pump and solenoid valve block. The solenoids are energized by the CVM and the pressure is supplied to the hydraulic cylinders, based on the input signals from the angle hall sensors and hall switches.
  • Page 27 Hydraulic System Operation ART-E46ICCVM.EPS ART-E46IC E HYD.EPS E46iCCVM/ST039/3/21/00...

  • Page 28: Emergency Operation

    Emergency Operation Emergency locking/unlocking of the top stor- age cover is carried out at the motor assembly. The motor assembly is accessed by removing the center arm rest and lifting the seat uphol- stery below the ski bag. ART-KT-5384 Pressing the button on the motor assembly will Release Button release the motor from the gear linkage.

  • Page 29: Comfort Operation

    Comfort Closing/Opening Comfort closing of the top is only possible at the driver’s door lock cylinder. If the key is held in the locking position, the top will be raised and the windows closed in the raising sequence. Comfort opening is possible from either the driver’s door lock cylinder or remotely from the key through the FZV.

  • Page 30: Diagnosis

    Fault Memory The fault memory of the CVM is stored in an NVRAM which can store up to a maximum of 16 faults. The fault are stored in the order of occurrence and a distinction is made between permanent and sporadic faults. Operation in the Event of Faults If a fault occurs during raising or lowering the top, all movement will cease and the fault will be stored in the fault memory.
  • Page 31 E46iC MANUAL TOP The E46iC - 323 Model is equipped with a manual top as standard equipment. Raising or lowering the top frame assembly is carried out by hand. However, the manual top features an electrically operated storage cover lock system. The unlocking/locking of the storage cover is a function of the general module. The frame of the manual top is similar to the fully automatic system, with two piston dampers mounted on the assembly to aid in its operation.
  • Page 32 M M a a n n u u a a l l T T o o p p S S t t o o r r a a g g e e C C o o v v e e r r O O p p e e r r a a t t i i o o n n D D i i a a g g r r a a m m Compartment Floor Micro Switch Top Switch KL30...

  • Page 33: Hard Top

    Hard Top An accessory hard top is available for the E46iC. It is constructed from aluminum with a finished fabric upholstery on the inside. Roof rack mounting points are integrated into the top on the left and right sides. ART-HARDTOP The hard top attaches to the vehicle at four places: •...
  • Page 34 The hard top locks on the left and right, in the rear, have integrated wiring connectors for power and ground supplies to the rear window defogger and interior lights. The connector on the left side contains two separate strips, one for power supply to the rear defogger and the other for power supply to the interior lights ART-HARDTOPLOCKLEFT...

  • Page 35: Workshop Hints

    Workshop Hints: Convertible Removal/Installation Top This section of the handout will cover highlights of soft top removal and installation. The “REPAIR MANUAL” should always be referenced for the complete procedure on top removal/installation and adjustments. Removal of the soft top assembly requires removing the rear seat and interior trim panels to gain access to the fastening points and wiring con- nections.
  • Page 36 The supply and drain lines from the hydraulic unit to the solenoid block on the top frame are connected through quick disconnect couplings located on the left side of the top storage com- partment. Care should be taken when discon- necting the lines not to drip the hydraulic fluid onto the top fabric.
  • Page 37 Service Adjustments The convertible top storage compartment cover is made of magnesium, a spacer plate must be used when installing the cover to the mounting brackets. the brackets have elon- gated holes for adjustment of the cover to the body. ART-ANTEMP ART-SHIM.
  • Page 38 The front of the storage compartment cover is adjusted at two places. The latch brackets are mounted through elongated holes for alignment of the brackets to the cover latches. Latch Bracket ART-KT4956 The front of the storage compartment cover’s height is adjusted by adjusting the bowden cable length at the storage cover lock motor.
  • Page 39 Review Questions 1. What are the major changes to the E46iC fully automatic top operation compared to the E36iC? 2. How many hydraulic solenoids are used in the operation of the E46iC top? 3. The locking/unlocking function of the storage compartment cover is controlled by which module? 4.

  • Page 40: Roll Over Protection System

    BODY Roll Over Protection System Model: E46 Convertible Production Date: 01/00 Objectives of the Module: After completing this module, you should be able to: • Identify all components of the Roll Over Protection System. • Describe the operation of the Clinometer sensor to deploy the Roll Over bars. •...
  • Page 41 Purpose of the System The roll over protection system (RPS) is a passive safety system that is designed to deploy only if the vehicle is in danger of rolling over, to afford vehicle occupants additional protec- tion. In addition to the reinforcing tube integrated in the windshield frame, RPS ensures that all the rear passengers are provided with necessary head clearance should th e car roll over.

  • Page 42: Components

    Components of the System: Roll Over Bar Cassettes The roll over cassettes are new and constructed completely from aluminum with a pad inte- grated in the top of the bar. The cassettes are bolted into the reinforced carrier behind the seat back.
  • Page 43 Roll Over Bar Cassettes A newly designed solenoid, mounted in the bottom of the cassette, holds the bars in the retracted position until triggered by the roll over sensor for deployment. ART-KT5449 E46iCCVM/ST039/3/21/00...

  • Page 44: Roll Over Sensor

    Roll Over Sensor The rollover sensor is installed in the rear behind the right rear seat back on the rollover cas- sette. It contains the processing electronics for rollover detection and deployment final stage for triggering the rollover bar solenoids. Two capacitors are also installed for roll bar deployment in the event of a power failure with the system during an a crash.
  • Page 45 Clinometer The clinometer inside the sensor consists of three level floats to detect body tilting, trans- verse and longitudinal acceleration for roll bar deployment. two floats are positioned on opposing angles of 52 degrees to the horizontal axis of the vehicle. The third float is posi- tioned at an angle of 72 degrees to the longitudinal axis.
  • Page 46 “G” Sensor The “G” sensor is used to trigger the roll bars if the vehicle should become airborne. the “G” sensor consists of a reed contact, magnet and spring assembly. As long as the vehicle is in contact with the road surface, the spring does not have enough tension to overcome the weight of the magnet and gravity.

  • Page 47: I P O

    Roll Over Sensor Diagnosis and Testing The sensor performs a self check every time the ignition key is switched on. All components of the sensor are checked including the output stages for roll bar triggering. If a fault is detected, the warning lamp in the cluster is illuminated and the fault is stored in the mem- ory of the convertible top module.
  • Page 48 Review Questions 1. What are the changes to the Roll Over Protection System (RPS) for E46iC? ___________________________________________________ ___________________________________________________ ___________________________________________________ ___________________________________________________ ___________________________________________________ 2. What are the critical angles for: Side roll over? _______________ and End to End roll over? ___________ 3. What is the purpose of the “G” sensor in the RPS system? ___________________________________________________ ___________________________________________________ ___________________________________________________...

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