2 Din Android-Functionality issues

1.2 Functional issues

1.2.1 Does not shut down

Case 1: Pressing the power button does not turn off the screen.

Perform touch screen button learning.
Key learning path: Car setting→Factory→000000→Touch Learning.

MT8163-Touch Button Learning

 

Case 2: The machine does not turn off the screen when the car key is removed.

Possible reasons: The red and yellow wires are connected to the original car B+ normal power. Check the wiring. The red wire is connected to the original vehicle ACC, and the yellow wire is connected to the original car B+.

 

1.2.2 Steering wheel control does not work

ISO cable key1/key2 cable

Universal loose wire power cable key1/key2 wire

In Android universal machines, the key1/key2 wires will have stickers on the wires.

If the steering wheel control cannot be used after installation, check whether the steering wheel control wire is correctly connected.

 

Step 1: Find the original car steering wheel control line and connect it.

Currently, the common original car steering wheel control signal lines are in the following forms:

Analog resistance type (resistance gradient type): Each button on the steering wheel is connected to the same signal line through a resistor network with different resistance values. When different buttons are pressed, the voltage/resistance value on the signal line will change.

Two-wire analog type: The steering wheel control signal of some models will be divided into two channels, such as one channel controls the volume-related buttons, and the other channel controls the song switching and mode switching buttons.

Digital bus type (CAN-BUS or LIN-BUS): The steering wheel buttons transmit data through the CAN bus or LIN bus, and the signal is in digital communication format, not a simple resistance signal.

For the first and second signal forms, connecting the key1/key2 line can control the steering wheel. For the third type, you need to purchase canbus and dedicated lines that are compatible with the original car.

 

Wiring steps

1. Power off: Make sure the engine is turned off and the power is off before wiring to avoid a short circuit.
2. Find the original steering wheel control line:

(1) Single-wire system: When removing the wiring harness behind the original car host, you will find a separate signal line marked with SWC (Steering Wheel Control) or similar logo, or you need to refer to the vehicle model wiring harness diagram to confirm its color and position.

Appearance: Generally, it is a thin single-core signal line (which may be of different colors, such as gray, green, or blue), with a ground wire (usually black or brown).

 

(2) Two-wire system: When opening the plug harness at the rear of the original car host, you may find two signal wires with different names or specific colors in the original connector, corresponding to the left and right or up and down steering wheel button groups.

Appearance: Usually two independent signal wires (for example, one green and one gray), plus a common ground wire.

 

If the above methods cannot find the corresponding square control line, refer to the following methods:

(1) Check the vehicle maintenance manual or the original circuit diagram: Usually, the pin definition table of the host plug will indicate "SWC", "Steering Control", or "Key".

(2) Use a multimeter to measure the resistance: In the power-off state, use the multimeter resistance range to measure the resistance value of the signal line to the ground, press different steering wheel buttons respectively, if the resistance value changes in a step-by-step manner, it can be confirmed that it is a resistance gradient signal line.

3. Wiring:

Single-wire system (resistance gradient):

Connect the original car steering wheel control signal line to the car machine KEY1 line;

Leave the car machine KEY2 unconnected or ground it according to the manual;

 

Two-wire system:

Connect the original car's first control line to KEY1;

Connect the second control line to KEY2;

(If the original car has two steering wheel control signal lines and the car machine has only one key line, connect any signal line of the original car to the car machine key line)

 

Step 2: Conduct square control learning

MT8163-square control learning video

 

1.2.3 Touch screen is not working

Touch screen is not working

If the display area of the machine has a touch problem

Please perform five-finger correction:

Touch screen correction operation video

 

The touch button is not working

Please perform button learning: Car setting; factory; 000000; touch learning.

MT8163-touch button learning

 

1.2.3 CarPlay function cannot connect wirelessly

1. Confirm the phone model and version information
Confirm the phone model and version information (iOS system version must be above 12).

2. Confirm BT connection
Confirm whether it can connect to the car computer's Bluetooth. If it cannot, please restart the car computer to see if it can connect; delete the matched Bluetooth settings on the mobile phone, turn on/off the Bluetooth function again, and try again to see if it can successfully connect to Bluetooth.

3. Confirm WIFI connection
If Bluetooth can be connected, confirm whether the WIFI on the mobile phone is turned on.

4. Confirm whether the reversing adapter cable is missing
If the Bluetooth connection is normal, confirm whether the reversing adapter cable is connected; whether the WIFI connection signal is full and normal, CarPlay still cannot connect, try to connect CarPlay using a wired USB to see if it is normal.

5. Wired connection verification
If the Bluetooth and WIFI connections are normal, but CarPlay still cannot connect, try connecting CarPlay with a wired USB to see if it works. If it can be connected normally, there may be a delay in the wireless signal transmission on the mobile phone. Please try again later; if it cannot be connected, it means that the mobile phone does not have the CarPlay function.

6. If the above methods cannot solve the problem, please contact customer service.

 

1.2.4 CarPlay function cannot be connected by wire

1. Confirm the phone model and version information
Confirm the phone model and version information (iOS system version must be above 12)

2. Confirm USB connection
Secondly, if there is no prompt on the car side and the phone side after inserting the USB, confirm that the USB cable on the phone side is normal, change another USB interface and confirm again, plug the USB flash drive into another interface to confirm whether it can be recognized normally, and rule out whether it is a problem with the USB interface. If it is a problem with the USB interface, please contact customer service to replace the USB adapter cable.


3. If the above method cannot solve the problem, please contact customer service.

1.2.5 Problem of wireless connection failure of the Android Auto function

1. Confirm the phone model and version information
Confirm the phone model and version information (Android system version must be above 11)

2. Confirm BT connection
Secondly, confirm whether the Bluetooth of the car can be connected. If the Bluetooth cannot be connected, restart the car to see if it can be connected; delete the matched Bluetooth settings on the mobile phone, turn on/off the Bluetooth function again, and try again to see if the Bluetooth can be successfully connected.

3. Confirm WIFI connection
If the Bluetooth can be connected, confirm whether the WIFI on the mobile phone is turned on.

4. Confirm whether the reversing adapter cable is missing
If the Bluetooth connection is normal, confirm whether the reversing adapter cable has been connected; whether the WIFI connection signal is full and normal, CarPlay still cannot be connected, try to connect CarPlay using a wired USB to see if it is normal.

5. Wired connection verification
If the Bluetooth and WIFI connections are normal, but CarPlay still cannot connect, try connecting CarPlay with a wired USB to see if it works. If it can connect normally, there may be a delay in the wireless signal transmission on the mobile phone. Please try again later; if it cannot connect, it means that the phone does not have the Android Auto function.

6. If the above methods cannot solve the problem, please contact customer service.

1.2.6 The problem of the Android Auto function not being able to connect via wire

1. Confirm the phone model and version information
First, confirm the phone model and version information (Android system version 11 or above)

2. Confirm the USB connection
If the USB cable on the phone is normal, change to another USB interface and confirm again (there are two USB interfaces on the car computer). Insert a USB flash drive into this interface to confirm whether it can be recognized normally. Exclude whether it is a problem with the USB interface. If it is a problem with the USB interface, please contact customer service to replace the USB adapter cable.

Secondly, if there is no prompt on the car computer after inserting the USB, and there is no prompt on the phone, you need to go to the phone settings-app to find Android Auto, check the storage and cache, clear the storage space, and connect again.

3. If the above method cannot solve the problem, please contact customer service.

 

1.2.7 Steering wheel control failure

(1) Step 1: Find the original steering wheel control line and connect it
The common original steering wheel control signal lines are as follows:

• Analog resistance type (resistance gradient type): The buttons on the steering wheel are connected to the same signal line through a resistor network with different resistance values. When different buttons are pressed, the voltage/resistance value on the signal line will change.
  
  
• - Two-wire analog type: The steering wheel control signal of some models will be divided into two channels, such as one channel controls the volume-related buttons, and the other channel controls the song switching and mode switching buttons.
  
  
• Digital bus type (CAN-BUS or LIN-BUS): For some mid-to-high-end or newer models, the steering wheel buttons transmit data through the CAN bus or LIN bus. Such signals are in a digital communication format, not simple resistance signals.

The first and second types of square control require connecting key1/key2 wires, and the third type requires purchasing a dedicated canbus.

Wiring steps
1. Power-off operation: Make sure that the engine has been turned off and the power has been turned off before wiring to avoid short circuits.

2. Find the original steering wheel control line:
(1) Single-wire system: When removing the wiring harness behind the original car host, you will find a separate signal line marked with SWC (Steering Wheel Control) or a similar logo, or you need to refer to the vehicle model wiring harness diagram to confirm its color and position.

Appearance: Generally, it is a thin single-core signal line (which may be of different colors, such as gray, green, or blue), with a ground wire (usually black or brown).

(2) Two-wire system: When opening the plug harness at the rear of the original car host, you may find two signal lines with different names or specific colors in the original connector, corresponding to the left and right or up and down steering wheel button groups.

Appearance: Usually two independent signal lines (for example, one green and one gray), plus a common ground wire.

If the above methods cannot find the corresponding square control line, refer to the following methods:
(1) Check the vehicle maintenance manual or the original circuit diagram: Usually, the pin definition table of the host plug will indicate "SWC", "Steering Control" or "Key".

(2) Use a multimeter to measure the resistance: In the power-off state, use the multimeter resistance range to measure the resistance value of the signal line to the ground, press different steering wheel buttons respectively, if the resistance value changes in a step-by-step manner, it can be confirmed that it is a resistance gradient signal line.

3. Wiring:

Single-wire system (resistance gradient):

- Connect the original car steering wheel control signal line to the car machine KEY1 line;

- Leave the car machine KEY2 unconnected or ground it according to the manual;

Two-wire system:

- Connect the original car's first control line to KEY1;

- Connect the second control line to KEY2;

(If the original car has two steering wheel control signal lines and the car machine has only one key line, connect any signal line of the original car to the car machine key line.)

 

(2) Step 2: Conduct square control learning：

MT8163-steering wheel control learning video
Wince machine-steering wheel control learning video

 

1.2.8 Rear view does not work

Case 1:

Android model - Rear view wiring diagram

Wince model - Rear view wiring diagram

The following cases apply to models that need to use canbus (i.e., after purchasing a universal machine, you need to purchase a power cable with canbus separately)

Check whether the camera is wired correctly

How to connect the universal machine rear-view camera:

1. Connect the red line of the camera power cable (K in the picture) to J on the rear view video input line, and wrap the black line with insulating tape (L in the picture);

2. Connect the video output line of the camera to the reversing video input interface of the car machine.

3. Connect the reversing trigger line of the camera to the "back" reversing control line of the car machine (H/I in the picture). If the "back" reversing control line cannot be found on the power cable, the customer needs to ask the wire seller to provide the wire definition diagram, find the position of the "back" reversing control line, and then break the line and connect it to the I line of the camera.

(Broken wire: On a complete wire, peel off a small section of the insulation, but do not disconnect the wire core itself, and then wrap, weld or connect another wire to the exposed wire core.)

(The above wiring method is for German brands, such as Volkswagen/Skoda/Audi/Mercedes-Benz/BMW/Audi. The reason is that the engine output voltage of German models is unstable, which causes the camera image output to be unstable, so the power supply method needs to be changed.

4. If you follow the above power connection method and find that the machine does not show the reversing picture after the reverse gear appears when reversing, you need to connect J&K to the positive pole of the reversing light (this situation usually occurs in non-German cars).

Check if the camera is damaged

Connect the video output cable of the reversing camera to the VIDEO IN video input of the car computer, and then switch the car computer to AV IN mode to confirm whether there is a picture. If there is a picture, it confirms that the video output of the lens itself is normal.

 

Case 2:

Android model - Rear view wiring diagram

Wince model - Rear view wiring diagram

       

The following cases apply to models that do not require canbus (i.e., after purchasing a universal machine, you can directly use the ISO line or the power line without canbus)

Check whether the camera is wired correctly

How to connect the universal machine rear-view camera:

1. Connect the red line of the camera power line (K in the figure) to the J on the rear view video input line, and connect it to the positive pole of the reversing light. Wrap the black line with insulating tape (L in the figure);

2. Connect the video output line of the camera to the reversing video input interface of the car machine.

3. Connect the reversing trigger line of the camera to the "back" reversing control line of the car machine (H/I in the figure). If the "back" reversing control line cannot be found on the power line, the customer needs to ask the seller of the wire to provide the definition diagram of the wire, find the position of the "back" reversing control line, and then break the line and connect it to the I line of the camera.
(Broken wire: On a complete wire, peel off a small section of the insulation, but do not disconnect the wire core itself, and then wrap, weld or connect another wire to the exposed wire core.)

4. If the owner's original car is a German car, and there are problems such as no image display, image jitter, water ripples, and no color, it is necessary to connect a filter/reverse rectifier in series between the positive pole of the original car's reversing light and the camera power line to filter out the ripple voltage interference of the original car's own power supply. Rectifiers can be purchased by searching for the keywords: rectifier camera.

Check if the camera is damaged
Connect the video output cable of the reversing camera to the VIDEO IN video input of the car computer, then switch the car computer to AV IN mode to check if there is a picture. If there is a picture, it confirms that the video output of the lens itself is normal.

1.2.9 The GPS signal is poor/speed indicator on the screen display interface is unresponsive

Android models, if you encounter the above problem:

1. First, you need to confirm whether the GPS antenna has been placed in an open position in the car (as shown above, on the passenger side)

2. Open the APP, GPS TEST PLUS (if the machine is not pre-installed with the app, you can download it from the Google Store), and test the signal strength:

A signal grid on the lower left indicates a signal


No signal grid indicates no signal

If it shows no signal, the GPS antenna may be damaged. Contact customer service to resend the accessories.

1.2.10 Unable to receive radio stations

(1) FM/RDS radio cannot be received

1.Wiring problem:
First, the original car's radio antenna must be connected to the machine's radio interface. The interface must be inserted all the way in, otherwise it will not be able to receive radio.

 

Second, the ANT line of the universal loose-wire power cord needs to be connected to the original car's ANT/ACC line for power supply.