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2017-2021 Volkswagen Polo SUV Electrical system User Manual

MY CAR USER MANUAL

Electrical system for Your Volkswagen Polo SUV Sixth Generation (2017-2021)

Electrical system  
The 12-volt supply system  
The following battery types with capacities between 44 Ah and 70 Ah are used according to the engine and  
equipment:  
•
•
•
Conventional wet battery  
EFB enhanced flooded battery  
EFB+ enhanced flooded battery  
Alternators with charging currents of 90, 110 and 140 amperes are used to generate the charging current  
according to the optional equipment.  
Relay and fuse holder SC in  
interior  
Alternator C  
12-volt battery with multifuse pre-  
fuse SA  
Relay and fuse holder SB in  
engine compartment  
S571_094  
You will find further information on batteries in Self-study Programme  
no. 504 “Vehicle Batteries”.  
38  
Networking system  
The networking system in the Polo is based on the new MQB-A0 platform and comes in two variants:  
•
•
Standard  
Standard Plus  
The two variants differ in the fitting locations of the data bus diagnostic interface J533 (gateway).  
Standard  
The gateway is integrated into the onboard supply  
control unit J519 (BCM) in the Standard system.   
The Standard system is installed in Polo models with  
manual gearboxes. The BCM with integrated  
gateway is located directly on the relay and fuse  
holder SC in the interior.  
Fuse holder SC  
S571_112  
Onboard supply control unit J519 with  
integrated diagnostic interface for data  
bus J533  
Standard Plus  
Data bus diagnostic  
interface J533  
The Standard Plus system has an external gateway. This  
is located opposite the onboard supply control unit on  
the fuse holder SC. The Standard Plus system is used for  
dual clutch gearboxes in conjunction with the  
mechatronic unit for dual clutch gearbox J743. In order  
to use the bus load in the powertrain CAN bus in an  
optimum way, individual control units, for example, the  
Power steering control unit J500, have been moved to  
the running gear CAN bus.  
Fuse holder SC  
S571_113  
Onboard supply control unit J519  
39  
Electrical system  
“Standard” networking system  
Key  
C
Alternator  
J519 Onboard supply control unit  
J525 Digital sound package control unit  
J533 Data bus diagnostic interface  
J623 Engine control unit  
R
Radio  
A27  
A31  
Output module 1 for right LED headlight  
Output module 1 for left LED headlight  
G397 Rain and light sensor  
J685 Display unit for front information display and  
operating unit control unit  
G578 Anti-theft alarm sensor  
J764 Control unit for electronic steering column lock  
J791 Park assist steering control unit  
J794 Control unit 1 for information electronics  
J854 Control unit for front left belt tensioner  
J855 Control unit for front right belt tensioner  
J882 Seat heating control unit  
G805 Pressure sender for refrigerant circuit  
H8  
Anti-theft alarm system horn  
J104 ABS control unit  
J126 Fresh air blower control unit  
J234 Airbag control unit  
J245 Sliding sunroof adjustment control unit  
J250 Electronically controlled damping control unit  
J255 Climatronic control unit  
J965 Interface for entry and start system  
J1086 Blind Spot Monitor control unit  
J1087 Blind Spot Monitor control unit 2  
R189 Reversing camera  
J285 Control unit in dash panel insert  
J345 Trailer detector control unit  
J362 Immobiliser control unit  
R78  
R89  
V26  
V27  
TV tuner  
CD player  
J367 Battery monitor control unit  
J428 Adaptive cruise control unit  
J431 Headlight range control unit  
J446 Parking aid control unit  
Rear left window regulator motor  
Rear right window regulator motor  
V147 Driver side window regulator motor  
V148 Front passenger side window regulator motor  
J453 Multifunction steering wheel control unit  
J500 Power steering control unit  
40  
USB  
MIB  
LVDS  
CVBS  
S571_047  
Control unit  
CAN bus wire  
Powertrain CAN bus (500 kbit/s)  
CAN bus extended (500 kbit/s)  
Convenience CAN bus (500kbit/s)  
MOST bus (150 Mbit/s)  
LIN bus wire  
MOST fibre optic cable  
Immobiliser subscriber  
Component protection participant  
Diagnostic connection  
LIN bus (19.2 kbit/s)  
a
LVDS  
CVBS  
MIB  
Low voltage differential signalling  
Colour video blanking signal  
Modular infotainment matrix   
CAN bus  
USB  
Universal Serial Bus  
41  
Electrical system  
“Standard Plus” networking system  
Key  
C
Alternator  
R
Radio  
A27  
A31  
Output module 1 for right LED headlight  
Output module 1 for left LED headlight  
E313 Selector lever  
G397 Rain and light sensor  
G578 Anti-theft alarm sensor  
G805 Pressure sender for refrigerant circuit  
J623 Engine control unit  
H8  
Anti-theft alarm system horn  
J685 Display unit for front information display and  
operating unit control unit  
J104 ABS control unit  
J743 Mechatronic unit for dual clutch gearbox  
J764 Control unit for electronic steering column lock  
J791 Park assist steering control unit  
J794 Control unit 1 for information electronics  
J854 Control unit for front left belt tensioner  
J855 Control unit for front right belt tensioner  
J882 Seat heating control unit  
J126 Fresh air blower control unit  
J234 Airbag control unit  
J245 Sliding sunroof adjustment control unit  
J250 Electronically controlled damping control unit  
J255 Climatronic control unit  
J285 Control unit in dash panel insert  
J345 Trailer detector control unit  
J362 Immobiliser control unit  
J965 Interface for entry and start system  
J1086 Blind Spot Monitor control unit  
J1087 Blind Spot Monitor control unit 2  
R189 Reversing camera  
J367 Battery monitor control unit  
J428 Adaptive cruise control unit  
J431 Headlight range control unit  
J446 Parking aid control unit  
R78  
R89  
V26  
V27  
TV tuner  
CD player  
J453 Multifunction steering wheel control unit  
J500 Power steering control unit  
J519 Onboard supply control unit  
J525 Digital sound package control unit  
J533 Data bus diagnostic interface  
Rear left window regulator motor  
Rear right window regulator motor  
V147 Driver side window regulator motor  
V148 Front passenger side window regulator motor  
42  
USB  
LVDS  
MIB  
CVBS  
S571_048  
Control unit  
CAN bus wire  
LIN bus wire  
Powertrain CAN bus (500 kbit/s)  
Running gear CAN bus (500 kbit/s)  
CAN bus extended (500 kbit/s)  
Convenience CAN bus (500kbit/s)  
Infotainment CAN bus (500 kbit/s)  
MOST bus (150 Mbit/s)  
MOST fibre optic cable  
Immobiliser subscriber  
Component protection participant  
Diagnostic connection  
a
LVDS  
CVBS  
MIB  
Low voltage differential signalling  
Colour video blanking signal  
LIN bus (19.2 kbit/s)  
Modular infotainment matrix   
CAN bus  
USB  
Universal Serial Bus  
43  
Electrical system  
Lighting  
Headlights  
You can chose between two main headlights:  
•
•
Halogen headlights  
LED headlights  
The halogen headlights contain the following light functions: dipped beam, main beam and turn signal.   
The side light and daytime running light functions are fulfilled by the additional light module in the bumper when  
the halogen headlights are fitted.  
Mainbeam  
(H7-55W)  
Dipped beam  
(H7-55W)  
Turnsignal  
(WY21W)  
S571_049  
The LED headlights contain the following light functions: dipped beam, main beam, turn signal and daytime  
running light/side light. An ambient light is used in the main headlight for the first time in the Polo class.  
It serves as a design element like the inner reflector. The ambient light lights up in addition to the daytime  
running light/side light.  
LED module for dipped  
beam and main beam (each  
with six LEDs, max.  
20.3 watts)  
Light conductor for “Ambient light”  
(one LED, 4.2 watts)  
Reflector with  
special design  
(no function)  
Daytime running light and  
side light (15 LEDs, max.  
6.9 watts)  
Turn signal  
(12 LEDs, max. 14.1 watts)  
S571_050  
Two screws need to be loosened and the headlight removed to renew the bulbs.  
44  
Additional light module  
The LED daytime running light or LED side light is integrated into the additional light module in the front bumper  
when the car is equipped with halogen headlights. The fog light function is also included in the light module and  
uses an H8 bulb. According to the vehicle equipment, the LED daytime running light/side light can be fitted  
individually or combined with the fog light.  
The fog light is also used for the static cornering light function.  
When the car is equipped with the LED headlights, the additional light module is used for the fog light and the  
static cornering light.  
LED daytime running light  
and  
LED side light  
Fog light with static  
cornering light function  
(H8 35 watts)  
(five LEDs, max. 6 watts)  
S571_051  
There is an opening in the front wheel housing liners allowing you to access the fog light bulbs if they need to be  
replaced.  
S571_052  
Connection for fog light with  
optional static cornering light  
function  
Connection for   
LED daytime running  
light  
45  
Electrical system  
Tail lights  
You can chose between two tail light clusters for the Polo:  
Basic  
LED  
Contains the following bulbs and functions:  
Contains the following bulbs and functions:  
Basic lights with active tail light  
LED lights with active tail light  
Tail light (P21W)  
Tail light (24 LEDs, 1.92 W)  
Rear fog light  
one side  
(3 LEDs, 1.7 W)  
S571_124  
S571_126  
Reversing light  
Rear fog light  
both sides  
(12 V/21 W)  
(H21W)  
Reversing light  
(P21W)  
Turn signal  
(WY21W)  
Turn signal  
(WY21W)  
each on one side  
Basic lights with active brake light  
LED lights with active brake light  
Brake light (P21W)  
Brake light (six LEDs, 3,12W)  
S571_125  
S571_127  
Basic bulb carrier  
LED bulb carrier  
Tail light  
Brake light  
Connection –  
tail light, brake  
light  
Connection –  
fog light  
S571_128  
S571_129  
Rear fog light/  
reversing light  
Turn signal  
Turn signal  
Reversing light  
46  
Automatic light switching  
From August 2016, vehicles require automatic light activation for the European type approval.  
The function is achieved via various sensors according to the equipment.  
-
-
Rain and light sensor G397 in the interior mirror base or  
light sensor G399 in the middle on the dash panel  
The sunlight penetration photosensor G107 is generally used to regulate the Climatronic. The additional light  
sensor G399 that is responsible for automatic light activation is located on the printed circuit depending on the  
variant.  
Detecting range of rain  
and light sensor G397  
Sunlight  
penetration photosensor  
G107  
Light  
sensor G399  
Humidity sender for air  
conditioning system  
G260  
S571_098  
S571_097  
The following list shows the variants that may be installed to regulate the automatic light activation. The  
function is active when only the light switch E1 is set to the AUTO position.  
Activation is via:  
G397  
G397  
G399  
G399  
S571_132  
47  
Electrical system  
Interior lighting  
Two systems are used for lighting in the vehicle interior in the Polo.  
The interior lights use conventional halogen bulbs in the Trendline and Comfortline equipment lines. The  
background lighting using LED technology for the interior features are used in the Highline and GTI variants and  
above. The footwell, the doors and the dash panel area are also offered with white LEDs in this case. You can dim  
the background lighting via the Infotainment system.  
Interior lights with halogen bulbs  
Interior lights with LEDs  
S571_059  
S571_058  
Menu selection in the Infotainment system  
S571_122  
48  
Dash panel inserts  
Three dash panel inserts are available:  
•
•
•
Basic with 2D dials  
Medium with 3D dials  
Active Info Display (AID)  
Basic  
The Basic dash panel insert has two round instruments for the rev counter and the speedometer. A display with  
640 segments is positioned in the centre between them. The following is some of the information that can be  
shown on the display:  
•
•
•
•
•
•
•
•
•
•
•
Ambient temperature  
Current fuel consumption  
Average fuel consumption  
Range  
Fuel tank fill level  
Driving time  
Distance driven  
Average speed  
Digital speed  
Speed warning  
S571_055  
Coolant temperature  
Medium  
The Medium dash panel insert has the same functions as the Basic variant.   
It differs, however, in the following points:  
•
•
Black and white multifunction  
display with TFT screen and a  
resolution of 320 × 240 pixels  
Additional displays for coolant  
temperature and fuel gauge are  
located respectively in the round  
instruments  
S571_056  
49  
Electrical system  
Active Info Display  
The Active Info Display (AID) is also appearing in the Polo for the first time. The AID has a high-resolution 10.25"  
TFT display and is available with the Composition Media or the Discover Media.  
The content is virtually displayed purely with the AID.  
The users themselves can choose how to arrange the content from a range of preset options. The driver  
information display can be customised to show additional data for the driving, navigation and driver assist  
functions in the middle area between the speedometer and the rev counter. Additional content can be freely  
configured in the round tubes by using the information profiles. The user can choose between up to 12 existing  
information profiles. The whole screen can, for example, be used to display the multifunction display (MFI),  
audio, telephone or navigation. The safety-related LED warning lamps are located in the left and right of the  
front frame. Further LED warning lamps (for example, airbag) are also located in the AID display. They are  
displayed there by software. The AID has a modular design like the other MQB dash panel inserts.  
It is connected to the fast MOST bus in order to display the navigation map, audio images or telephone contact  
pictures.  
Printed circuit module with frame  
Housing cover  
Characteristics:  
•
•
•
Resolution 1280 × 480 pixels  
10.25" colour TFT display  
8-segment gauges on each side for engine coolant  
temperature and fuel tank  
Conventional connector  
socket for dash panel  
insert (on back of  
printed circuit module)  
•
•
•
Display brightness up to 950 candela  
Speaker for acoustic signals and warnings  
Passive cooling elements are used for cooling  
50  
S571_057  
This picture shows an example display on the AID.  
Connector socket for MOST fibre optic cable  
(on back of printed circuit module)  
Speaker  
TFT display with heat sink  
S571_103  
Front frame  
51  
Electrical system  
Keyless locking and starting system  
“Keyless Access”  
The Keyless Access locking and starting system is being used for the first time in the Polo 2018. It allows you to  
unlock the doors on the new Polo and start the engine at the push of a button without having to operate the key  
by hand. The most important components of Keyless Access are the ID sender in the vehicle key, the aerials and  
sensors in the door handles, the electronic ignition lock, the ignition and starter button and the electronic  
steering column lock.  
Interior aerial 1 for entry  
and start system R138  
Contact sensor for front right exterior  
door handle G606 with right aerial for  
entry and start authorisation R201  
Interior aerial 2  
for entry and start system  
R139  
Rear bumper aerial for  
entry and start system  
R136  
Interface for entry and  
start system  
J965  
S571_062  
Control unit for electronic  
steering column lock J764  
Starter button E378  
Contact sensor for front left exterior door  
handle G605 with left aerial for entry and  
start authorisation R200  
You will find further information on “Keyless Access” in Self-study Programmes  
no. 493 "The Sharan 2011 Electrics/Electronics" and no. 545 "The Passat 2011 Electrical System".  
52  

Related Topics

The 12-volt supply system
Networking system
?Standard? networking system
?Standard Plus? networking system
Lighting
Additional light module
Tail lights
Automatic light switching
Interior lighting
Dash panel inserts
Active Info Display
Keyless locking and starting system ?Keyless Access?

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