Audi A4/A5/Q5 Radio Upgrade System Wiring Diagram

Part 1-Connection

Component Identification

A: Display screen
B: Main Box to screen signal connector
C: 3 way USB
D: MIC (External microphone)
E: Wi-Fi antenna
F: GPS antenna
G: Gateway cable
H: Power connector
i: Power cable
J: Reversing video input connector (Yellow RCA jack with "BACK-VIDEO IN")
K: BACK wire (Blue wire with "BACK" label, trigger wire for backup camera)
Adapter with sticker

Note: If your existing radio system is Concert/Symphony version, the accessories are as shown. If it is MMI 3G version, an extra mini speaker is included but not pictured.

Connection Details

A. Display Screen: The new display screen unit replaces the original Audi screen.

B. Connection Cables: Cables connecting the new display screen and the control box.

C. USB Cords: For Apple Carplay/Android Auto dongle, front dash camera, DAB+ tuner, USB thumb drive. Recommended placement: glove box on the passenger side.

D. External Microphone: For hands-free calls, Siri, and voice commands. Mount close to the driver's head for optimal voice quality (e.g., A-pillar or ceiling lamp).

E. Wi-Fi Antenna: Place on the dashboard for good Wi-Fi signal.

F. GPS Antenna: Place on the dashboard and under the windshield for good GPS signal. Placement options include the middle dashboard, under the middle dashboard, or on the right corner.

G. Gateway Cable:

For MMI 3G radio systems: Connect to CAN BUS plugs behind the storage box on the passenger side.
For Concert/Symphony radio systems: Connect to CAN BUS plugs behind the climate control panel.

H. Power and Audio Adapter: Connects to the rear panel of the original Audi head unit.

i. Power and Audio Adapter: Connects to the original harness removed from the original Audi head unit.

J. Yellow RCA Jack: Labeled "BACK-VIDEO IN" for aftermarket backup camera video input.

K. Blue Wire: Labeled "BACK". This is the trigger wire for the aftermarket backup camera. Connect to the positive wire of the reverse lights to switch the screen to the camera view when reversing.

Detailed Connections and Settings

Detail connection of the B, C and D: Ensure white connectors are not reversed to avoid issues.

Detail connection of control box: Incorrect connection of black and white connectors can prevent the system from powering on.

Detail connection of CAR-LVDS:

Connect the LVDS cable (from the original AUDI screen) to the control box's CAR-LVDS port. Failure to do so will prevent the display of original Audi car computer information and factory backup camera.
The LVDS plug is located behind the original display screen, not the head unit.
For Concert/Symphony basic radio (without navigation): The LVDS is a black connector.
For MMI 3G radio (with navigation): The LVDS is a round connector.

Operation and Sound

2-1. Switching to Original Audi Screen: Click the "Original" icon on the home screen. If the original Audi screen does not display correctly (common with MMI 3G systems due to resolution mismatch), adjust the resolution settings.

Settings Adjustment: Navigate to Settings > System settings > AudiConfig. Select "AudiA4/Q5 low", "AudiA4/Q5 middle", or "AudiA4/Q5 high" that matches the resolution. Do not change the "Old aodi" setting.

2-2. Media Input: Press the "MEDIA" button on the radio panel.

2-3. Audio Source: Select "External Audio input (AUX)".

2-4. AMI to AUX Conversion: If "AMI" is displayed instead of "AUX", connect the Audi AMI-AUX cord (sold separately) to the AMI port in the glove box. This will change the "AMI" option to "AUX".

2-5. Playback: Tap the screen to access the new upgrade system and play music or video.

Camera Settings

Part 3-Camera setting: After powering on the unit, go to Setting/Rear view.

Factory Backup Camera: Select "Original Camera".
Aftermarket Backup Camera: Activate "Add on Camera".
Other options include "360 Camera", "Reversing assistance line", "Display Radar Information", and "Reversing front".

Aftermarket Wired Backup Camera Connection

Part 4-Aftermarket wired backup camera connection:

4-1. Red wire: Connect to the "BACK" wire (purple) from the main harness. This is the reverse trigger wire. Incorrect connection will prevent the screen from changing when reversing.
4-2. Yellow RCA jack: Connect to the "Back-VIDEO IN" jack (yellow) of the navigation unit. This is the video input jack. Incorrect connection will result in no signal when reversing.
4-3. Black wire: Connects to the NEGATIVE WIRE of the reverse lights (not the license plate light).
4-4. Red wire: Connects to the POSITIVE WIRE of the reverse lights (not the license plate light).

Q&A

Q5-1: How do I switch between the new upgrade screen and the original Audi screen?
A5-1: Tap the "Original" icon on the home screen to switch to the original Audi screen. Tap the touchscreen directly to switch to the new upgrade screen.

Q5-2: Why is the original Audi computer screen or factory backup camera not showing?
A5-2: Check that the original LVDS cable (from the old screen) is securely plugged into the CAR-LVDS port of the control box.

Q5-3: I have no sound from the Android system, but the original FM, AM, CD sound works.
A5-3:

Tap "Original" icon to switch to the original Audi screen.
Press the MEDIA button and check audio sources. Ensure "External Audio input (AUX)" is activated.
Tap the touchscreen to access the new upgrade system and play music/video.

Note: If your car shows "AMI" instead of "AUX", connect the Audi AMI-AUX cord to the AMI port in the glove box. This will change "AMI" to "AUX" and enable sound.

Q5-4: Why does the system not power on?
A5-4:

Verify the CAN connector (black) is correctly plugged into the red CANBUS plugs.
For MMI 3G systems, connect the "G-gateway cable" to the CAN BUS plugs behind the storage box on the passenger side.
For Concert/Symphony systems, connect the "G-gateway cable" to the CAN BUS plugs behind the climate control panel.

Important Note on CAN Data Wires:

For MMI 3G systems, the green CAN data wire should be labeled "Q5", not "Q3".
For Concert/Symphony systems, this wire may not be present; ignore it if so.
For MMI 3G systems, the connector should be labeled "Q5", not "A1/Q3".
For Concert/Symphony systems, this connector may not be present; ignore it if so.

Q5-5: Is this product plug and play? Do I need to program my Audi? Do I need an external GPS antenna? Can I still listen to Sirius/XM radio and check car computer information?
A5-5: Yes, it is plug and play with the same plugs and harness as the original Audi system. No programming is required. All necessary accessories are included. You can continue to listen to Sirius/XM radio and access original Audi car computer information.

Q5-6: How can I hear navigation sound while listening to FM/CD?
A5-6: Activate FM/CD sound, then tap the "NAVI" icon to start navigation. For Concert/Symphony systems, navigation and phone call audio plays through the front left speaker, while other speakers play FM/CD. For MMI 3G systems, navigation and phone call audio plays through the included mini speaker.

Q5-7: Where should I mount the control box?
A5-7: Mount the control box near the glove box on the left, as shown in the provided picture.

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