Most important terminals
Terminal 15 (Position "ON" ignition switch)
Receives power through the ignition switch. The wires only supply power when the ignition is on and in most cases are green or green with a stripe of a different color.
Terminal 30 ("+" batteries)
This terminal supplies battery power; it is in most cases red or red with a stripe of another color.
Terminal 31 ("-" batteries)
Leads to mass. Wires are usually black.
Terminal X
It is energized when the ignition switch is turned from the position "LOCK" into position "OFF" and is de-energized when the key is turned to position "LOCK".
Designation of electrical wiring connectors
On electrical equipment diagrams, connectors have a designation of the form TXXYY, where XX is a number indicating the number of connector contacts, and YY is an auxiliary letter designation.
Wiring designation
The designation of the wires in the diagrams consists of 3 parts and has the form of type 1.5 BL / GN. First part (1.5) means wire cross section (mm/'kv); second/third parts (BL/GN) mean the main color / color of the wire insulation strip:
- bl - Blue
- br - Brown
- ge - Yellow
- gn - Green
- gr - Gray
- li - Purple
- or - Orange
- ro - Red
- sw - Black
- ws - White
List of electrical components
Main components of electrical equipment
- A. Battery
- A1. Additional battery
- B. Starter
- C. Generator
- C1. Voltage regulator
- D. Ignition switch
- 01. Immobilizer reader unit
- P. Spark plug connectors
- Q. Spark plugs
- Q10-Q13. Glow plugs #1-#4
- R. Audio block
- R47. Single lock and anti-theft alarm antenna, down on the A-pillar
- TV2. Terminal 30 wiring connection
Earth connection points
- 12. In the engine compartment, on the left
- 13. In the engine compartment, on the right
- 42. Near the steering column
- 50/51. Left / right in the trunk
- 77/78. Lower left/right B-pillar
- 95. Ground point 1, in the seat adjustment wiring harness
- 114. In the automatic transmission wiring
- 136/145. Mass chute 2/3, in the seat heating wiring
- 205/206. In the electrical wiring of the driver's / front passenger's door
- 207/208. In wiring harness rear left/right door
- 218/219. Ground points 1/2, in tailgate wiring harness
- 238/249. Ground points 1/2, in interior wiring
- 277-279. Mass points 3-5, in the interior wiring
- 283. Mass point 2, in the electrical wiring of the engine compartment
- 286/294/295. Ground points 8/9/10, in interior wiring
- 306. Connection to the mass of the ignition coils, in the wiring of the engine
- 345. In the electrical wiring of the bumper
- 347. In the electrical wiring of the ceiling
- 367-369. Ground points 2-4, in the main wiring harness
- 371-374. Ground points 6-9, in the main wiring harness
- 376-378. Ground points 11-13, in the main wiring harness
- 380-382. Ground points 15-17, in the main wiring harness
- 384. Mass point 19, in the main wiring harness
- 387. Mass point 22, in the main wiring harness
- 389. Mass point 24, in the main wiring harness
- 391. Mass point 26, in the main wiring harness
- 395-400. Ground points 30-35, in the main wiring harness
- 406/407. Ground point 3, in driver/passenger door wiring harness
- 431. Mass point 2, in the wiring of the ceiling
- 437. In the wiring of the license plate light
- 438. Mass point 3. in the wiring of the ceiling 456-458. Ground points 1-3, in front bumper wiring harness
- 502. Threaded connection 1 (30a), on the relay holder
- 507. Threaded connection (30), on the fuse holder (on battery) 514. Threaded connection 4 (30a), on the relay holder
- 610. Mass point of the audio unit, under the center console, in front
- 612. In the center of the luggage compartment lid
- 638/639. Right/Left A-pillar
- 645-647. Mass points 1-3, on the bulkhead
- 652. Mass point for engine and transmission
- 657. Mass point 1, left, at the rear window
- 671-673. Weight points 1-3 (in front on the left longitudinal beam)
- 675/676. Weight points 2, right/left in trunk
- 683/684. Front on right/left stringer
- 685/686. Weight points 1/2 front on the right stringer
- 687/688. Mass points 1/2, on the central tunnel 689. Roof center, front
Power connections
Caution: The connections listed below, without location specification, are located in the main wiring harness.
- B154. Compound 1 (DCt), in the interior wiring
- B162. Connection 75a, in the interior wiring
- B231. Compound 5 (30a), in the interior wiring
- B250. In ceiling wiring
- B275. Compound (87)
- B277. Compound 1 (15a)
- B280-B282. Compounds 4-6 (15a)
- B284. Compound 8 (15a)
- B287/B288. Connections 11/12 (15a)
- B316. Compound 2 (30a)
- B318-B320. Compounds 4-6 (30a)
- B322/B327/B329. Connections 8/13/15 (30a)
- B331/B332/B334. Connections 17/18/20 (30a)
- B335. Compound 1 (54)
- B340/B341. Connections 1/2 (58d)
- B344. Compound 1 (61)
- B346. Compound 1 (75)
- B348/B349. Connections 1/2 (75A)
- B351-B353. Compounds 2-4 (87a)
- B358-B360. Connections 9-11 (87a)
- B362. Compound 13 (87a)
- B364/B365. Connections 15/16 (87a)
- B367/B368. Connections 18/19 (87a)
- B369. Compound 1 (5 Volt)
- B379. Compound 1 (Brake wear indicator)
- B383/B384. Connections 1/2 (transmission line CAN bus signal 1)
- B390/B391. Connections 1/2 (transmission line CAN bus signal 0)
- B397 / B4O6. Connections 1 (Convenience CAN bus, signal 1)
- B441. Compound (CCS)
- B444. Compound 1 (diagnostics)
- B465-B487. Compounds 1-23
- B520. Compound (RL)
- B528. Compound 1 (LIN bus)
- B537-B539. Compounds 28-30
- B549. Compound 2 (LIN bus)
- B552. Connection 2, in ceiling wiring
- B555. Compound 2 (50)
- B559. Compound 1 (30g)
- B564-B573. Compounds 31-40
- B574/B575. Connections 20/21 (87a)
- B577. Compound (LIN bus), in the wiring of the ceiling
- B592/B593. Connections 1/2, in the Climatronic wiring harness
Other compounds
- D101/D106. Connections 1/4, in motor wiring
- D136. Power connection 2 (15a), in the electrical wiring of the engine compartment
- D141. Compound (5V), in the engine wiring
- D174. Mass point 2 (5V), in the engine wiring
- D180/D181. Connections 1/2 (87a), in the electrical wiring of the engine compartment
- D190. Mass point 3 (5V), in the engine wiring
- D52. Power connection (15a), in the electrical wiring of the engine compartment
- E48. Compound (injectors), in the electrical wiring of the fuel injection system
- M1. Power connection 1 (30), in the seat adjustment wiring
- M9. Seat adjustment wiring connection
- M41-M44. Connections 1-4, in the wiring of the driver's seat
- M51-M54. Connections 1-4, in the electrical wiring of the front passenger seat
- M61-M68. Connections 1-8, in the wiring of the rear seat
- M94-M96. Connections 2-4, in seat adjustment harness
- 04. Power connection (30as), in the seat heating wiring harness
- 015/016. Connection 4, in seat heating wiring harness
- R75/R76. Connections (58d) 1/2, in the wiring of the door control unit
- U2. Compound 1 (15), in automatic transmission wiring
- W41. Power connection (58), in the license plate light wiring harness
- X149/X150. Compound (5V/58), in the wiring of the rear bumper
- X151. Compound (5V), in the electrical wiring of the front bumper
- X65. Compound (parking assistance system), in the electrical wiring of the front bumper
- X68. Power connection (parking assistance system), in the wiring of the rear bumper
Switches, switches, regulators
- E1. Light switch
- E2. Turn signal switch
- EZ. Hazard switch
- E4. Low beam switch for headlights and high beam signaling
- E7. Fog light switch
- E18. Rear fog light switch
- E20. Instrument and switch backlight control
- E22. Wiper interval switch
- E24. Driver seat belt switch
- E25. Front Passenger Seat Belt Switch
- E26. Glove box light switch
- E34. Tailgate glass cleaner switch
- E3Z. Wiper interval switch
- E40. Power window control switch in the driver's door
- E43. Mirror adjustment switch
- E44. Headlight washer pump switch
- E45. Tempostat switch
- E48. Mirror selection switch for adjustment
- E52. Rear Left Power Window Switch (at the door)
- E53. Rear Left Power Window Switch (in the driver's door)
- E54. Rear Right Power Window Switch (at the door)
- E55. Rear Right Power Window Switch (in the driver's door)
- E74. Battery Main/Isolation Switch
- E81. Front Right Power Window Switch (in the driver's door)
- E94/95. Front Left/Right Seat Heating Control
- E102. headlight range control
- E107. Power window control switch in the front passenger door
- E128/E129. Switch-regulator for heating the rear left / right seat
- E139. Sunroof sliding cover control switch
- E177. Front passenger seat lumbar adjuster
- E180. Heated windshield switch
- E218-E220. Seat Position Setting Button #1-#3
- E224. Front Passenger Airbag Key Switch
- E231. Heated exterior mirror switch
- E233/E234. Remote/manual trunk release button.
- E256. TCS/ESP switch
- E263. The switch of function of folding of an external rear-view mirror
- E2bb. Parking Assist Switch
- E267. Cabin volume sensor switch
- E308/E309. Interior locking switch, driver/passenger side
- E318. Child safety lock switch
- EZ19. Fuel filler cap release button
- E325. Sunroof switch
- E326. Front cabin light switch
- E335/E336. Lumbar height/protrusion switch
- E337. Massage function switch
- E360. Vehicle inclination switch
- E415. Switch for authorization of vehicle access and engine start
- E418. Fore and aft seat adjustment switch
- E421. Tilt adjustment switch
- E424. Seat height adjustment switch
- E425. Backrest adjustment switch
- E447. Seat position memory button
- E454 / E455. Rear left/right reading light
- E457/E458. Reading light driver/passenger side
- E492. Tire pressure monitoring display key
- E538. Parking brake switch
- E540. Function switch "AUTO HOLD"
Sensors-switches, contact switches
- F. Brake light switch
- F1. Engine oil pressure switch
- F2/3. Contact switch in the driver's/front passenger's door
- F4. Reversing light switch
- F10/F11. Contact switch in rear left/right door
- F34. Low Brake Fluid Level Switch
- F47. Brake Pedal Position Sensor (in the engine compartment)
- F59. Single lock switch in the driver's door
- F125. Multifunction switch
- F138. Spiral Contact Spring Airbag
- F147/148. Contact switch for vanity mirror illumination, driver/passenger side
- F189. Tiptronic Mode Switch
- F220/221. Locking unit for a single lock in the driver's / front passenger's door
- F222/223. Block locking a single lock in the rear left / right door
- F256. Luggage compartment lock block
- F266. Hood contact switch
- F265. Cooling system thermostat controlled by MAP sensor
- F319. Selector lever lock switch in position P
Sensors, instrumentation
- G/G1. Fuel Gauge/Indicator
- G3. coolant temperature gauge
- G5. Tachometer
- G6. Fuel distribution pump
- G17. Cabin temperature sensor
- G21. Speedometer
- G28. crankshaft speed sensor
- C-31. charge air pressure sensor
- G32. Low coolant level sensor
- G33. Washer fluid low sensor
- G34. Front Left Brake Pad Wear Sensor
- G39. Lambda probe
- G40. Hall Sensor
- G42. IAT sensor
- G44/G45. Right rear/front wheel sensor
- G46/G47. Left rear/front wheel sensor
- G59/60. Driver/Front Passenger Seat Temperature Sensor
- G61. Knock sensor #1
- G62. coolant temperature sensor
- G65. high pressure sensor
- G66. Knock sensor #2
- G70. MAF sensor
- G71. Intake manifold pressure sensor
- G79. Gas pedal position sensor
- G81. Fuel temperature sensor
- G83. Coolant temperature sensor at radiator outlet
- G85. Steering angle sensor
- G93. Transmission oil temperature sensor
- G94/G95. Rear Left/Right Seat Temperature Sensor
- G107. Sunlight intensity sensor
- G108. Lambda probe №2
- G112/G113. Potentiometer of the e/motor of a drive of the central damper/damper of an air stream
- G128. Front passenger seat occupied sensor
- G13O. Post catalytic lambda probe
- G131. Postcatalytic lambda probe #2
- G134. Sunlight intensity sensor #2
- G135. Potentiometer of the e/motor of a drive of the shutter of an obduv of glasses
- G143. Potentiometer of the e/motor of a drive of the shutter of a mode of air circulation
- G150/G151. Left/right ventilation system temperature sensor
- G179/180. Driver/Front Passenger Side Airbag Activation Sensor
- G182. Transmission input shaft speed sensor
- G185. Gas pedal position sensor No. 2
- G186. Throttle actuator (electronic power control)
- G187/188. Throttle position sensor 1/2
- G190. Forward collision sensor
- G191/192. temperature sensor (ventilation system) central/footwell
- G195. Transmission output speed sensor
- G203/G206 Rear left/right parking aid sensor
- G212. EGR system potentiometer
- G219. Driver's seat backrest adjustment sensor
- G220/G221. Potentiometer of the e / motor drive of the left / right temperature control damper
- G227. Sensor for adjusting the position of the driver's seat in the longitudinal direction
- G232. Driver's seat tilt sensor
- G247. Fuel pressure sensor
- G252/G255. Front Right/Left Parking Assist Sensor
- G256/G257. Rear Airbag Activation Sensor Driver/Passenger Side
- G261/G262. Temperature sensor in left/right footwell
- G263. Evaporator outlet temperature sensor
- G266. Engine oil level and temperature sensor
- G269. Steering torque sensor
- G273. Cabin volume sensor
- G287. Postcatalytic lambda probe #3
- G294. Brake Servo Pressure Sensor
- G299. IAT sensor #2
- G303. Module No. 1 for receiving / sending a passenger compartment volume sensor
- G330. Potentiometer of the e/motor of a drive of the shutter, scattered air supply
- G374/G375. Height/Longitudinal Stop Adjustment Sensor
- G384. Vehicle inclination sensor
- G397. Rain and light sensor
- G410. Low fuel pressure sensor
- G423. Potentiometer for adjusting the height of the lumbar support (massage models)
- G450. Exhaust pressure sensor no. 1
- G452. Igniter No. 2 of the emergency tensioner of the front passenger's seat belt
- G453. Driver's side air curtain igniter
- G476. Clutch position sensor
- G483. Brake servo vacuum sensor
- G503. Sensor for seat height adjustment
- G506. Temperature sensor before particulate filter
- G507. Temperature sensor before turbocharger
- G514/G515. Potentiometer for horizontal/vertical adjustment of the left exterior mirror
- G516/G517. Day potentiometer for horizontal/vertical adjustment, right exterior mirror
- G527. Temperature sensor behind particulate filter
Sound signals
- N. Klaxon
- H2. High frequency klaxon horn
- I3. Buzzer or gong
- H7. Low frequency klaxon horn
- H12. Alarm siren
- H15/H22. Front/Rear Parking Assist Buzzer
Electronic control units
- J. ECM
- J4. 2-tone horn
- J9. Heated rear window relay
- J47. Heated windshield relay
- J49. Fuel pump relay #2
- J104. Used ABS
- J119. Multifunction display
- J126. Used fresh air blower
- J1Zb. Used seat and steering column adjustment (with memory function)
- J179. Used glow plugs
- J217. B / UAKPP
- J234. Used SRS
- J245. Used adjustable sunroof cover
- J255. Used Climatromc system
- J285. Used instrument cluster with display
- J293. Used radiator fan
- J301. Used air conditioning system 3317/3329. Voltage supply relay terminals 30/15
- J338. Throttle block
- J386/387. Used driver/passenger door
- J388/389. Used rear left/right door
- J393. Central control unit for comfort devices
- J400. Used w / wiper motor
- J466. S/A parking assistance system
- J500. Used EP AS
- J519. Used on-board network
- J527. Used steering column electronics
- J533. Data bus diagnostic connector
- J538. Used fuel pump
- J540. Used parking brake
- J623. ECM
- J682. Terminal 50 power supply relay
- J706. Used by determining the occupancy of the front passenger seat
- J729/J730. Relay 1/2 double washer
- J764. Used electronic steering column lock
- J774/J786. Used heated front seats
Lighting
- K18. Trailer direction indicator lamp
- K28. Coolant temperature/level control pump
- K29. Glow plug warning lamp
- K31. Tempostat control lamp
- K37. Washer fluid low warning light
- K38. Control lamp of low level of impellent oil
- K47. ABS warning lamp
- K65/K94. Control lamp of the left/right indexes of turn
- K105. Fuel Reserve Warning Lamp
- K118. Brake warning lamp
- K132. Power control malfunction indicator lamp
- K133. Control lamp of function of full locking of the uniform lock
- K136. Parking assistance warning lamp
- K145. Front Passenger Airbag Deactivation Control Lamp
- K155. TCS/ESP warning lamp
- K162. Control lamp of the disabled interior volume sensor
- K170. Control lamp of malfunction of lamps of lighting devices
- K174/K175. Control lamp for internal locking, driver/passenger side
- K188. A control lamp of the gauge of an inclination and/m
- K213. Parking brake warning lamp
- K216. Control lamp No. 2 of the ESP and TCS systems
- K236. Electronic brake warning lamp
- K237/K238. Control lamp No. 1 / No. 2 of the AUTO HOLD function
- L9. Light switch backlight
- L22/23. Left/Right Fog Light Bulb
- L28/L32. Illuminated front/rear cigarette lighter
- L4. Left rear fog light bulb
- L71. Illumination of the TCS switch
- L76. Button illumination
- L78. Illuminated door mirror adjuster
- L101. Illumination of the selector lever position display
- L117. Parking assistance switch illumination
- L118. Illumination of the interior volume sensor switch
- L120. Glove box lighting
- L131/L132. Turn signal lamp in exterior left/right mirror
- M1/2. Left front/right rear position lamp
- M3/4. Right front/left rear side light bulb
- M5/6. Left front/rear turn signal lamp
- M7/8. Right front/rear turn signal lamp
- M9/10. Left/Right Stop Lamp
- M17. Right reversing lamp
- M25. Upper Stop Lamp
- M29/30. Left dipped/high beam
- M31/32. Right dipped/high beam
- N110. Illumination of the handle for unlocking the left door
- W1. Front saloon lamp W3. Light in the trunk
- W6. Light in glove box
- W9/W10. Light in left/right footwell
- W11/W12. Rear left/right reading light
- W14/W20. Vanity mirror lamp, passenger/driver's side
- W31/W32. Front left/right threshold light
- W33/W34. Lamp of illumination of back left/right threshold
- W39/W40. Left/Right Center Reading Light
- W43. Rear interior lamp
- W52/W53. Front left/right threshold light (in the outside rearview mirror)
- X. License plate light
Valves, solenoid valves, squibs
- N18. EGR valve
- N30-33 Injectors for cylinders 1-4 respectively
- N70. Ignition coil #1 with output stage
- N75. Solenoid boost pressure control valve
- N79. PCV heating element
- N80. E/m valve No. 1 of an adsorber of system EVAP
- N88-93. E/m valve 1-6 respectively
- N95. Igniter Airbag driver
- N127. Ignition coil #2 with output stage
- N131/N132. Igniter No. 1 / No. 2 Airbag front passenger
- N153/N154. Igniter No. 1 emergency belt tensioner driver / front passenger
- N153/N154. Igniter No. 2 emergency belt tensioner driver / front passenger
- N199/200. Igniter Side Airbag Driver/Front Passenger
- N201/202. Inflatable curtain igniter driver/passenger side
- N205. Intake camshaft control valve
- N240-243. E/m valve of an injector of the cylinder 1-4
- N250. Igniter No. 2 Airbag driver
- N251/252. Inflatable curtain igniter driver/passenger side
- N276. Fuel pressure control valve
- N280. A/C Compressor Control Valve
- N282/N283. Solenoid valves No. 9/10
- N291/292. Ignition coils 3/4 with output stage
- N316. flap valve in the intake manifold
- N345. EGR cooler valve
- N360. Steering column lock control
- N376. E/m valve of blocking of turn of the switch of ignition
Wiring connectors, sockets
- T1. Screw connection, on the junction block in the engine compartment
- T2ba. 2-pin connector, black, behind right headlight
- T4a. 4-pin connector, near the starter
- T4ba, T4db. 4-pin connector, black, under front passenger seat
- T4bv. 4-pin connector, black, under the driver's seat
- T46a/T46b. 4-pin connector, black, under left/right rear seat
- T6af. 6-pin connector, on the junction block in the engine compartment
- T8a. 8-pin connector, black, on left front stringer
- T8d. 8-pin connector, on the right side of the rear bumper
- T8x/T8y. 8-pin connector near injectors/cylinder head
- T10c/T10d. 8-pin connector under the driver's/front passenger's seat
- T10m. 10-pin connector, on the junction block in the engine compartment
- T10o, T10w. 10-pin connector, on transmission
- T10x. 10-pin connector, near the selector lever
- T14f. 14-pin connector, on transmission
- T16d. 16-pin diagnostic connector
- T16ks/T16ls. 16-pin connector, front, on the left/right outside rearview mirror
- T20b. 20-pin connector, on the air conditioning control unit
- T20s. 20-pin connector, on the Climatromc unit/A/C control unit
- T40. 40-pin connector, under the junction block in the engine compartment
- U1. cigarette lighter
- U5. 12 V socket, in the trunk
- U9. Rear cigarette lighter
- U10. Trailer wiring connector
- U18. 12 V socket #2, in the trunk
Electric motors, fans, pumps
- V. Windshield wiper motor
- VI. The electric motor for the drive of the sliding cover of the upper hatch
- V2. Fresh air blower
- V7. radiator fan
- V12. Tailgate glass cleaner motor
- V17/V25. Electric motor drive left / right outside rear-view mirror
- V26/27. Rear left/right power window electric motor
- V28/V31. Fore/aft adjustment electric motor for driver/front passenger seat
- V45/V46. Driver/passenger seat back adjustment electric motor
- V48/49. Electric motor for headlight tilt adjustment, left/right
- V56/V57. Driver/passenger door lock motor
- V59. Windshield washer pump
- V70. Central damper motor
- V71. Air flow damper motor
- V107. Window demister electric motor
- V121/V122. Folding electric motor for left/right exterior mirror
- V126/V130. Lumbar adjustment electric motor for front passenger seat in vertical/longitudinal direction
- V138. Electric driver's seat height adjustment
- V147/148. Electric motor front left / right power window
- V149/150. Electric motor for adjusting the left / right outside rear-view mirror
- V154. Air circulation damper motor
- V155. Electric motor for unlocking the fuel filler cap
- V157. Electromotor of a drive of a gate in the inlet pipeline
- V158/V159. The electric motor for the drive of the left / right temperature control damper
- V161/V162. Electric motor for additional blocking of a single lock of the driver's / front passenger's door
- V163/V164. Electric motor for additional blocking of a single lock of the rear left / right door
- V187. Power steering electric motor
- V213. Diffused air damper actuator motor
- V214/V215. Electric motor of the single lock of the rear left/right door
- V229/V230. Driver's seat lumbar adjustment electric motor in vertical/longitudinal direction
- V243/V244. Driver/Passenger Seat Tilt Electric Motor
- V246. Front passenger seat height adjustment electric motor
- V254. Electric motor for unlocking the luggage compartment lid
- V282/V283. Left/right parking brake e/motor
- V328. Massage function pump
Mirrors and displays
- Y6. Automatic transmission mode selector lever position indicator
- Y7. Auto-dimming interior rear view mirror
- Y20/Y21. Left/Right Auto-dimming Outside Mirror
Heating elements
- Z1. Heated tailgate glass
- Z2. Heated windshield
- Z4/5. Heated exterior left/right mirror
- Z6/7. Heated driver's seat cushion/back
- Z8/9. Heated front passenger seat cushion/back
- Z10/11 Cushion/backrest, rear left seat
- Z12/13. Cushion/backrest, rear right seat
- Z19. Heated lambda probe
- Z28. Heating No. 2 lambda probe
- Z29. Heating of the post-catalytic lambda probe No. 1
- Z30/Z64. Heating of the post-catapetic lambda probe No. 2 / No. 3
- Z76/Z77. Heating of the left/right lateral support of a pillow of a driver's seat
- Z73/Z79. Heating of the left/right lateral support of a back of a seat of the driver
- Z80/Z81. Heating of the left/right lateral support of a pillow of a seat of the forward passenger
- Z84/Z85. Heating of the left/right lateral support of a pillow of a back right seat
- Z86/Z87. Heating of the left/right lateral support of a backrest of a back right seat.
- Z83/Z89. Heating of the left/right lateral support of a pillow of a back left seat
- Z90/Z91. Heating of the left/right lateral support of a backrest of a rear left seat
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