汽车专业英语3-Unit 3.

1、Unit 3Unit 3 Body Power Control System Body Power Control System nAutomobile body electric wiring is Automobile body electric wiring is laid through the whole vehicle body laid through the whole vehicle body as if the blood pipes of the man as if the blood pipes of the man (shown in Fig. 3-3-1 , Fig

2、. 3-3-2). (shown in Fig. 3-3-1 , Fig. 3-3-2). It is very important and complex.It is very important and complex. nAutomobile body electrical system Automobile body electrical system includes many power control systems includes many power control systems such as such as wiperwiper and and washerwashe

3、r system, system, power window control system, power power window control system, power door lock control system, power door lock control system, power mirror control system, power seat mirror control system, power seat system and so on. system and so on. wiperwiper 雨刮器雨刮器 washerwasher 洗涤器洗涤器 Fig. 3

4、-3-1 Body Electrical Wire Harness Layout and Parts Location （车身电器线束布局和部件位置）（车身电器线束布局和部件位置）（a） n1- power window master SW 2- front door speaker LH 3- front door lock 1- power window master SW 2- front door speaker LH 3- front door lock motor LH 4- power window motor front LH 5- front personal light 6

5、- front motor LH 4- power window motor front LH 5- front personal light 6- front door speaker RH 7- power window motor front RH 8- power window control SW door speaker RH 7- power window motor front RH 8- power window control SW front RH 9- door lock motor and key lock and unlock SW front RH 10- doo

6、r front RH 9- door lock motor and key lock and unlock SW front RH 10- door courtesy light front RH 11- door courtesy SW front RH 12courtesy light front RH 11- door courtesy SW front RH 12、2525、2626、27- 27- relay connectors 13- high mount stop light 14- light defect sensor 15- relay connectors 13- hi

7、gh mount stop light 14- light defect sensor 15- auto antenna motor and relay 16auto antenna motor and relay 16、17- CD- audio player 18- license plate 17- CD- audio player 18- license plate light RH 19- license plate light LH 20- luggage compartment door motor and light RH 19- license plate light LH

8、20- luggage compartment door motor and light SW 21- fuel level sensor 22- luggage compartment light 23-fuel light SW 21- fuel level sensor 22- luggage compartment light 23-fuel filler opening lid motor 24- fuel pump 28- door courtesy light SW front LH filler opening lid motor 24- fuel pump 28- door

9、courtesy light SW front LH 29- door courtesy light front LH 30- luggage compartment door SW29- door courtesy light front LH 30- luggage compartment door SW Fig. 3-3-2 Body Electrical Wire Harness Layout and Parts Location（车身电器线束布局和部件位置）（车身电器线束布局和部件位置）（b） n1-power window control SW rear LH 2-power wi

10、ndow motor rear LH 3-tweeter 1-power window control SW rear LH 2-power window motor rear LH 3-tweeter speaker LH 4-remote control mirror LH 5-comb mirror light LH 6-personal light speaker LH 4-remote control mirror LH 5-comb mirror light LH 6-personal light rear LH 7-remote control mirror RH 8-comb

11、mirror light RH 9-rear door speaker rear LH 7-remote control mirror RH 8-comb mirror light RH 9-rear door speaker RH 10-tweeter speaker RH 11-power window control SW rear RH 12-personal light RH 10-tweeter speaker RH 11-power window control SW rear RH 12-personal light rear RH 13-powerrear RH 13-pow

12、er window motor rear RH 14-ash tray light rear RH 15-door lock window motor rear RH 14-ash tray light rear RH 15-door lock motor and key lock and unlock SW rear RH 16-rear window defogger(+)17-rear motor and key lock and unlock SW rear RH 16-rear window defogger(+)17-rear window defogger(-) 18-door

13、courtesy SW rear RH 19-blower motor control relay window defogger(-) 18-door courtesy SW rear RH 19-blower motor control relay rear 20-ABS speed sensor rear RH 21rear 20-ABS speed sensor rear RH 21、22-rear combination light RH 2322-rear combination light RH 23、26-rear 26-rear combination light LH 24

14、-rear blower motor rheostat 25-rear blower motor 27-combination light LH 24-rear blower motor rheostat 25-rear blower motor 27- rear air conditioning magnetic valve 28- door courtesy rear RH 29-power seat rear air conditioning magnetic valve 28- door courtesy rear RH 29-power seat sliding motor rear

15、 RH 30- door courtesy SW rear LH 31-power seat sliding SW sliding motor rear RH 30- door courtesy SW rear LH 31-power seat sliding SW rear RH 32-power seat sliding SW rear LH 33-ABS speed sensor rear LH 34-power rear RH 32-power seat sliding SW rear LH 33-ABS speed sensor rear LH 34-power seat slidi

16、ng motor rear LH 35- door lock motor and key lock and unlock SW seat sliding motor rear LH 35- door lock motor and key lock and unlock SW rear LH 36-ash tray light rear LH 37-door courtesy rear LH 38- rear door rear LH 36-ash tray light rear LH 37-door courtesy rear LH 38- rear door speaker LHspeake

17、r LH n Automobile body electrical system includes Automobile body electrical system includes many power control systems such as wiper many power control systems such as wiper and washer system, power window control and washer system, power window control system, power door lock control system, syste

18、m, power door lock control system, power mirror control system, power seat power mirror control system, power seat system and so on.system and so on. n1. Wiper and Washer System1. Wiper and Washer System nWith the ignition switch in the ACC or ON With the ignition switch in the ACC or ON position, p

19、ower is position, power is supplisupplied through 20A ed through 20A fuse (No.20, located in the fuse block) to fuse (No.20, located in the fuse block) to front wiper motor terminal. Ground is front wiper motor terminal. Ground is supplied to front wiper switch terminal supplied to front wiper switc

20、h terminal through body ground . through body ground . nWhen the front wiper switch is placed in When the front wiper switch is placed in the LO position, ground is supplied through the LO position, ground is supplied through terminal of the front wiper switch to front terminal of the front wiper sw

21、itch to front wiper motor terminal. With power and ground wiper motor terminal. With power and ground supplied, the front wiper motor supplied, the front wiper motor operateoperates at s at low speed. When the front wiper switch is low speed. When the front wiper switch is placed in the HI position,

22、 the front wiper placed in the HI position, the front wiper motor operates at high speed. motor operates at high speed. supplysupply 提供提供 operateoperate 工作工作 nWhen the front wiper switch is placed in When the front wiper switch is placed in the OFF position, the front wiper motor the OFF position, t

23、he front wiper motor will continue to operate until the wiper will continue to operate until the wiper arms reach the base of the arms reach the base of the windshieldwindshield (Auto stop). (Auto stop). nIntermittentIntermittent operation is controlled by operation is controlled by the the BCMBCM.

24、When the front wiper switch is . When the front wiper switch is placed in the INT position, ground is placed in the INT position, ground is supplied to BCM terminal from front supplied to BCM terminal from front wiper switch terminal through body wiper switch terminal through body grounds. The desir

25、ed interval time is grounds. The desired interval time is input to BCM terminal from front wiper input to BCM terminal from front wiper switch terminal. Based on these two switch terminal. Based on these two inputs, an intermittent ground is inputs, an intermittent ground is supplied to front wiper

26、relay terminal supplied to front wiper relay terminal from BCM terminal. With power and ground from BCM terminal. With power and ground supplied, the front wiper relay is supplied, the front wiper relay is activated. Front wiper motor operates at activated. Front wiper motor operates at desired low

27、speeds with BCM terminal desired low speeds with BCM terminal grounded. grounded. windshieldwindshield 风挡玻璃风挡玻璃 intermittentintermittent 间歇的间歇的 BCMBCM 车身控制模块车身控制模块 nWhen the lever is pulled to the wash position, When the lever is pulled to the wash position, ground is supplied to washer motor termin

28、al, ground is supplied to washer motor terminal, and to BCM terminal. The washer motor operates. and to BCM terminal. The washer motor operates. The front wiper motor operates at low speed The front wiper motor operates at low speed for about 3 seconds. This for about 3 seconds. This featurefeature

29、is is controlled by the BCM in the same manner as controlled by the BCM in the same manner as the intermittent operation.the intermittent operation. n2. Power Window Control System2. Power Window Control System nPower window system consists of Power window system consists of n(1)a BCM (Body Control

30、Module)(1)a BCM (Body Control Module) n(2)four (2)four LCUSLCUS (Local Control Module) (Local Control Module) n(3)four power window regulators(3)four power window regulators nBCM is connected to each LCU BCM is connected to each LCU viavia data-linedata-line A-1 A-1 or A-2 and LCUS supply power and

31、ground to or A-2 and LCUS supply power and ground to each power window each power window regulatorregulator. When ignition . When ignition switch is in the ON position, power window switch is in the ON position, power window will be operated depending on power window will be operated depending on po

32、wer window sub/main switch (which is combined with each sub/main switch (which is combined with each LCU) condition.LCU) condition. featurefeature 性能性能 LCUSLCUS 局部控制局部控制 viavia 经，由经，由 data-linedata-line 数据线数据线 regulatorregulator 调节器调节器 nPower windows can be raised or lowered with Power windows can b

33、e raised or lowered with each sub-switch or main-switch located on the each sub-switch or main-switch located on the drivers door drivers door trimtrim when ignition key is in when ignition key is in the ON position and power window lock switch the ON position and power window lock switch on the dri

34、vers door trim is on the drivers door trim is unlocked.unlocked. nWhen power window lock switch is locked, no When power window lock switch is locked, no windows can be raised or lowered except for windows can be raised or lowered except for driver side window.driver side window. nWhen ignition key

35、is in the ON position, to When ignition key is in the ON position, to fully open the driver side window, press down fully open the driver side window, press down completely on the completely on the automaticautomatic switch (main switch (main switch) and release it, it needs not be held. switch) and

36、 release it, it needs not be held. The window will automatically open The window will automatically open all the all the wayway. To stop the window, pull up down then . To stop the window, pull up down then release the switch.release the switch. n3. Power Door Lock Control System3. Power Door Lock C

37、ontrol System nThe lock turning it to UNLOCK once will lock all doors; turning it to UNLOCK once unlocks the corresponding door; turning it to unlocks the corresponding door; turning it to UNLOCK again within 5 seconds after the first UNLOCK again within 5 seconds after the first unlock operation un

38、locks all of the other unlock operation unlocks all of the other doors. (Signals from door key cylinder switch)doors. (Signals from door key cylinder switch) nOn some vehicles, the power door lock system On some vehicles, the power door lock system is is integratedintegrated with the with the Remote

39、 Keyless EntryRemote Keyless Entry (RKE) system. Power door lock system is (RKE) system. Power door lock system is controlled by BCM. The power door lock system controlled by BCM. The power door lock system is also enabled whenever a door is open, is also enabled whenever a door is open, unless the

40、unless the lock-out preventionlock-out prevention feature is feature is enabled and ignition key is in ignition. When enabled and ignition key is in ignition. When either door lock switch is activated, both either door lock switch is activated, both doors lock or unlock. Each door lock can also door

41、s lock or unlock. Each door lock can also be manually operated. Door locks are operated be manually operated. Door locks are operated by by reversiblereversible actuators. The BCM reverses actuators. The BCM reverses (switches) voltage flow in door actuators to (switches) voltage flow in door actuat

42、ors to complete locking and unlocking plete locking and unlocking functions. insertinsert 插进插进 key key cylindercylinder 钥匙锁芯钥匙锁芯 integratedintegrated 集成的集成的 Remote Remote Keyless Keyless Entry Entry SystemSystem 遥控门锁遥控门锁 系统系统 lock-out lock-out prevention prevention 防锁死防锁死 reversiblereversible 双向的双向的

43、 nBCM can be programmed to BCM can be programmed to customizecustomize power door power door lock operation. The 2 lock operation. The 2 programmableprogrammable functions are functions are “last door closed locking” and “lockout “last door closed locking” and “lockout prevention”. The last door clo

44、sed locking is prevention”. The last door closed locking is available on all vehicles with power door locks. available on all vehicles with power door locks. This feature provides for delayed lock of doors This feature provides for delayed lock of doors (3 seconds after last door is closed). An (3 s

45、econds after last door is closed). An audibleaudible warning will sound 3 times to indicate that last warning will sound 3 times to indicate that last door closed locking function is door closed locking function is pendingpending. Pressing . Pressing the lock switch again will immediately lock doors

46、. the lock switch again will immediately lock doors. Pressing switch to UNLOCK position will cancel Pressing switch to UNLOCK position will cancel last door closed locking feature. If ignition key last door closed locking feature. If ignition key is left in ignition switch, last door closed is left

47、in ignition switch, last door closed locking feature will not locking feature will not initiateinitiate and lock-out and lock-out prevention feature is enabled. prevention feature is enabled. nThe lock-out protection prevents keys from being The lock-out protection prevents keys from being locked in

48、 vehicle. Power door locks are locked in vehicle. Power door locks are disableddisabled if ignition key is in ignition switch and door is if ignition key is in ignition switch and door is open. An audible warning will sound 5 times as a open. An audible warning will sound 5 times as a reminder to remove keys from ignition before reminder to remove keys from ignition before locking doors. locking doors. customizecustomize 定制定制 pr