Honda Bmw 5 Service Manual
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320-3 Steering and Wheel ~li~nmentl 4 Pitman arm height measurement gauge /I (Tool NO. BMW 32 2 140) - 4 Ball joint removal tool (Tool No. BMW 31 2 240) 4 Ignition lock releasing tool (Tool No. BMW 32 3 11 0) 4 Steering column shear bolt Toot socket (E8) (Tool No. BMW 32 3 120) 4 Camber setting tool set (Tool No. BMW 32 3 140) 4 Ring antenna removal tool (Tool No. BMW 61 3 300)
I Steerina and Wheel Alianment Steering system Two types of steering gear are used in the E39 series models. 6-cylinder (5251, 528i and 530i) models are equipped with rack and pinion steering. The steering rack is mounted to an aluminum subframe. V-8 (540i) models are equipped with a recirculating ball and nut steering gearbox mounted to a steel subframe. At low speeds, maximum power assist is provided to ease parking and city driving. At high speeds, assist is reduced to ensure stability. The power steering system varies assist based on engine speed. Power boost for the steering is provided by an engine-driven hydraulic pump. A hydraulic control valve is used to control boost pressure. The steering wheel connects to the steering gear via an ad- justable steering column which incorporates a rubber cou- pling (guibo) to dampen vibration and noise. Power steering fluid is supplied from the fluid reservoir to the pump and to the steering gear via rubberlmetal hoses. The return line from the steering gear to the reservoir loops into the airstream in front of the radiator and connects to the steering fluid cooler. The fluid cooler is attached to a cassette which also includes cooling coils for engine oil, transmission fluid and AIC condenser. The steering gear requires no maintenance other than align- ment and periodic inspection for worn components. Inspect rubber rack boots (rack and pinion system) and tie-rod end boots periodically for tears or damage. Replace if necessary. - NOTE- The airbag system is traditionally referred to as Supplemen- tal Restraint System (SRS). The BMW versfon of SRS used m the E39 models is known as the Multiple Restraint System - (MRS). - -
Steering and Wheel Alignment I Rack and r in ion steering 1 Steering system variations I 6-~~linderrnodels (525i,>28i, 530i) / 1. Left tie rod 2. Right tie rod 3. Steering rack 4. Steering gearbox 5. idler arm 6. Center tie rod 7. Steering knuckle Recirculating ball and nut steering r V-8 models 154Oib
Steering and Wheel Alignment Steering system warnings and cautions WARNING - The BMW airbag system is complex. Special precautions must be observed when servicing the system. Serious in- jury may result if system service is attempted by persons unfamiliar with the BMW airbag system and its approved service procedures. BMW specifies that all inspection and service should be peiformed by an authorized BMW deal- e,: The BMW E39 is equipped with an airbag mounted in the steering wheel. The airbag is an explosive device and should be treated with extreme caution. Always fol- low the airbag removal procedure as outlined in 721 Airbag System (SRS). BMW airbags are equipped with a bacli-up power sup- ply inside the airbag control module. A 5 second wait- ing period should be observed after the battery cable has been disconnected. This will allow the reserve power supply to discharge. Do not reuse self-locking nuts. They are designed to be used only once and may fail if reused. Always re- place them with new locliing nuts. * Do not install bolts and nuts coated with undercoating wax, as correct tightening torque cannot be assured. Always clean the threads with solvent before installa- tion, or install new parts. Do not attempt to weld or straighten any steering com- ponents. Always replace damagedparts. CAUTION-- - Some E39 models are equipped with aluminum suspen. sion components. The following cautions apply: Due to the chemical and corrosion characteristics of aluminum, do not bring into contact with battery acid. Do not clean with wire brushes with brass or iron bris- tles. Only use brushes with stainless steel bristles. Do not expose to flying sparks from grindinghutting op- erations. Do not subject to steel welding splashes. * Do not expose to temperatures over 80% (176°F). even for short periods. Temperatures in painting iacili- ties are not a problem.
320-7 Steering and Wheel ~liqnmentl STEERING WHEEL Steering wheel, removal and installation WARNING - The BMWairbag system (Supplemental Restraint System or SRS) is complex. Special precautions must be observed when servicing. Serious injury may result if SRS system serv- ice is attempted by persons unfamiliar with the BMW SRS and its approved service procedures. BMW specifies that all inspection andservice should be preformed by an authorized BMW dealer. E39 cars may come with either one of two different styles of steering wheel: Multifunction (MFL) steering wheel * Sport steering wheel 4 Multifunction (MFL) steering wheel components: 1. Cruise control 1 radio 1 telephone electrical harness 2. Horn button electrical harness 3. Airbag electrical harness 4. Radio / telephone control switch set 5. Air bag 6. Cruise control switch set Sport steering wheel 3 5 0021413 4 Sport steering wheel components: 1. Switch carrier 2 Steering wheel switch set electrical harness 3. Airbag 4. Lower cover 5. Horn button and airbag electrical harness - Center steering wheel. Make sure front wheels are pointed straight ahead. - Disconnect negative (-) cable from battery. CA UTIOP& Prior to disconnecting the battern read the battew discon- nection cautions given in 001 General Cautions and Warnings. -
320-8 Steering and Wheel Alignment 4 MFL steering wheel: Loosen 2 airbag mounting fasteners (Torx T27 or T30) located at rear of steering wheel (arrow). 4 Sport steering wheel: Insert screwdriver through opening in rear of steering wheel and push against spring tension to release airbag. Repeat procedure on other side of steering wheel. - Carefully lift airbag from steering wheel and disconnect elec- trical harnesses from back side of unit. Refer to component illustrations above. Also see 721 Airbag System (SRS). Improper handling of the airbag could cause serious injury. Store the airbag with the horn pad facing up. If stored facing down, accidental deployment couldpropel it violently into the Avoid damaging the variety of convenience switches, such as radio and cruise controls, installed in the steering wheel of 4 Remove steering wheel center bolt (arrow).
Check for proper alignment of steering column marks (ar- row) before removing steering wheel. NOTE- The steering column and steering wheel are match marked at the factory Remove lower steering column trim panel. See Steering col- umn trim, removing and replacing. Working underneath steering column, disconnect electrical harnesses (A) and (B). Remove steering wheel. When reinstalling steering wheel: Align steering wheel and column match marks. Align steering wheel to alignment pins located on steering column switch block. Install steering column center bolt. Do not over-torque. Carefully install airbag. See 721 Airbag System (SRS). Tightening torques Steering wheel to steering shaft (M14) 63 Nm (47 ft-lb) Airbag to steering wheel (MFL only) 8 Nm (6 ft-lb)
320-1 0 Steering and Wheel Alignment Steering column components 1. Steering lock 2. Lower steering shafl 3. Horizontal drive motor 4. Longitudinal adjusting drive shafl 5. Steering column support 6. Vertical adjusting drive shafl 7. Vertical drive motor 8. Lower support ring for steering angle sensor 9. Upper support ring for steering angle sensor 10. Steering angle sensor 11. Upper steering shafl 12. Steering shafl bearing 13. Bearing inner sleeve 14. Circlip 15. Collar 16. Steering wheel mounting bolt Steering column trim, removing and replacing - Tilt steering column down and extend fully. - Remove plastic retaining screw from upper trim cover, 4 Push in sides of upper trim cover (arrow) to release from lower trim. Pull back and up on upper trim.
Steering and Wheel ~li~nrnentl q Pry gently to detach flexible cover from upper trim. Lift off trim. < Remove lower dash trim panel fasteners (A) and (B). Lower trim panel and disconnect wiring harnesses on back side of panel. Remove trim panel. - Installation is reverse of removal. Ignition switch ring antenna (EWS), removing and installing - Remove upper and lower steering column trim as described earlier. - Disconnect electrical harness plug from ring antenna. - Use flat side of BMW special tool 61 3 300 to pry ring antenna off ignition lock cylinder. - Installation is reverse of removal. lgnition lock cylinder, removing and installing - Disconnect negative (-) cable from battery. CAUTION- Prior to disconnecting the battery, read the battery discon- nection cautions given in 001 General Cautions and Warnings. - Remove upper and lower steering column trim as described earlier.
I Steering and Wheel Alignment With ignition key in ON position (60 from LOCKED): - Disconnect ring antenna harness connector. Insert BMW special tool 32 3 110 or a thin piece of stiff wire into opening (arrow) in lock cylinder. Turn tool forward (clockwise) approximately 90 and re- move lock cylinder. * Reinstallation is reverse of removal. NOTE- Using the valet ley during this procedure will provide better access to lock opening. Steering column lock, removing and installing - Disconnect negative (-) cable from battery. CAUTIO& Prior to disconnecting the battery, read the battery discon- nection cautions given in 001 General Cautions and Warnings. - Remove steering wheel as described earlier. - Remove steering column trim panels as described earlier. - Remove collar and circlip from steering shaft. Refer to illus- tration of steering column components. 4 Pry steering shaft bearing with inner sleeve out of lock hous- ing. - Remove ring antenna as described earlier. - Remove column switches. See 612 Switches. < Automatic transmission models: Loosen and disconnect in- terloclc shift cable (arrow) from ignition lock assembly.