Road Top

Cable Connection

Road Top Co., Ltd

 Contents

1. Toggle Switch Setup ......................................................................................................................................1

1.1. Choose the toggle switch setup .............................................................................................1

1.2. Where to find the toggle (DIP) switches? .......................................................................... 2

1.3. Set the toggle switch according to A/C cable connection way ................................. 3

2. Dashboard Removal ..................................................................................................................................... 5

3. Kit Contents .......................................................................................................................................................6

3.1. Cable Connection Chart ............................................................................................................6

3.2. Power Cable Connection ..........................................................................................................8

3.3. A/C controller power cable connection ...............................................................................9

3.4. LVDS Cable Connection .........................................................................................................10

3.5. Microphone cable connection .............................................................................................. 12

3.6. WiFi Antenna and USB-AV Cable Connection ..............................................................14

3.7. AMI Audio cable connection ..................................................................................................15

3.8. Where to put the CarPlay box? ........................................................................................... 16

4. CarPlay Sound Setup .................................................................................................................................17

4.1. Bluetooth settings ...................................................................................................................... 17

4.2. Set AUX ......................................................................................................................................... 17

4.3. Set AMI ...........................................................................................................................................18

5. Reverse and Front Cameras ...................................................................................................................20

5.1. Original OEM Camera ............................................................................................................. 20

5.2. After Market Camera ................................................................................................................21

5.3. Settings for aftermarket reverse camera and front cameras .................................. 21

6. FAQ .................................................................................................................................................................... 22

7. Contact US ......................................................................................................................................................23
 Road Top User Manual

1. Toggle Switch Setup

1.1 Choose the toggle switch setup according to the year of the car and the MMI
system of the car.

Car year MMI MMI picture

system

2012-2018
(A6 with 6.5” RMC
monitor)

1.2 Where to find the toggle（DIP）switches?

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Steps for change the toggle switch

Step 1 : power off the engine

Step 2 : change the toggle switch

according the toggle switch dial setup
chart

Step 3 : unplug and reconnect the CAN

power cable

Step 4 : power on the engine

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1.3 Set the toggle switch according to A/C cable connection way

1.3.1 For High Speed CAN （Priority）

C-CP High Speed CAN connect to A-Air Conditioner CAN

Tips:
1. Pin 7: with OEM parking sensor  Off / 0, No OEM parking sensor  On /1
2. Pin 8: with OEM Bluetooth  Off / 0, No OEM Bluetooth  On /1
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Note： Firstly! Use High Speed CAN connection way, But if have the problem of the

black screen, please try the Low Speed CAN connection way, check the problem

photo below
Black screen when switch to CarPlay function Flash screen in OEM function

1.3.2 For Low Speed CAN

C-CP Low Speed CAN connect to A-Air Conditioner CAN

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Tips:
1. Pin 7: with OEM parking sensor  Off / 0, No OEM parking sensor  On /1
2. Pin 8: with OEM Bluetooth  Off / 0, No OEM Bluetooth  On /1

2. Dashboard Removal

Please scan QR code, view the detail via YouTube video on dashboard removal guidance.

For A4 A5 A6 A7

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3. Kit Contents

3.1 Cables Accessories

3.2 Cable connection chart

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Please follow the connection chart accurately (detailed instructions below).

After the cables are all connected, you will be able to switch between the original Audi and the
CarPlay interfaces by long pressing the “MEDIA” button on the MMI controller.

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3.3 Head Unit power cable connection

Unplug the OEM original power cable from the head unit and reconnect it to the new cable
harness. Then plug the new cable into the head unit.

3.3 A/C controller power cable connection

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3.4 LVDS cable connection

Where to find the LVDS port?

The LVDS port is different for different OEM head unit host.

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LVDS cable connection

1 ) New LVDS cable 1 goes to the LVDS port of OEM the head unit.
2 ) New LVDS cable 2 goes to the original LVDS cable.

Note: Connecting the LVDS cables incorrectly will result in a black screen!

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3.5 Microphone cable connection

3.5.1 for Cars without original OEM Microphone

If your car doesn’t have factory Mic, you can use the aftermarket Mic. But the code NO.8 of
toggle switch need to be set as “on” status.

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Aftermarket mic should be installed close to the driver position.

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3.6 WiFi antenna and USB-AV cable connection

Tip :

A） The WiFi antenna cannot be placed close to metal objects.

( The WiFi signal will lost if WiFi antenna is close to the metal objects.)

B) The USB port in the USB-AV cable is used for software updates.

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3.7 AMI audio cable connection ( only for Audi cars with AMI function)

If your car has AMI port, you need to connect the AMI cable to your car AMI port, so that the
sound from the CarPlay function will work via the car’s AMI AUX function.

Where to find the AMI port?

in the glove-box in the glove-box

in the central console box behind media interface doors

AMI cable connection

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3.8 Where to put the CarPlay box?

The CarPlay interface decoder box should be installed in an appropriate space near, or on, the
OEM head unit. Or in the glove box.

on the OEM head unit Beside the OEM head unit

In the glove box box In the glove box box

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4. CarPlay Decoder Sound Setup

4.1 Bluetooth settings

If your phone already has a bluetooth connection to your car, disconnect it.

4.2 Set AUX

Before using the CarPlay system, you need to set the sound input on your OEM interface to

“AUX”, otherwise the CarPlay /Android Auto system will have sound!

On the original Audi System, navigate to the “Media“ interface，click the “External audio input”

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4.3 Set AMI ( only for Audi cars with AMI function)

If your car has AMI port, after connect the AMI cable to your car AMI port, you need to set the
“Media” into “AMI”

After finish the AUX or the AMI setting, long press “MEDIA” button from MMI knob controller,
you can switch the system between the original Audi system and the CarPlay system.

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CarPlay Decoder main interface

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5. Reverse and Front Cameras

5.1 Original OEM camera

Enter the “Setup” menu from the decoder main menu, choose “Reverse”, then make sure the
“Reverse Camera” option is set to “Original”.

Make sure that the following three options are all set to “off”.

5.2 Aftermarket camera

Aftermarket rear view camera cable connection

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Aftermarket front view camera cable connection

5.3 Settings for aftermarket reverse camera and front cameras

After the aftermarket camera cables are connected, you need to check the camera settings

(click the “Setup” button from the decoder main menu).

“Reverse” camera settings: choose “Reverse”, from the menu and set the reverse camera to

“Aftermarket”.

the options “Reverse line detect”, the “Reverse display track”, and the “Reverse display radar”
should all be set to “off”.

Front view camera settings: choose “Reverse”, from the menu and set the front view time
between 1 to 15 seconds

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6 FAQ

1. Why is there no sound during the call?

Solution: Disconnect the Bluetooth between your phone and your car.

2. Why is there no sound during CarPlay function?

Solution: Check the car, if the car has AMI port, AMI cable needs to be connected to the
original AMI port.

3. How do I activate Siri?

There are two ways to activate the Siri function:

1) Use the Voice Control button on the steering wheel or
2) Long press the confirm button on the iDrive controller

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7 Contact Us

Please contact us via purchase platform or the WhatsApp if you need any help.

Tip:
before contacting us, please help us to collect the following information.

1. the order ID
2. the car model
3. the year of the car
4. screen size of the car
5. the toggle switch setup
6. pictures about the LVDS cable connection
7. the software version ( in the CarPlay decoder menu, enter into the “Setting”, choose the
“System Version”, you will see the software version.)

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EU-Representative

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