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Hyundai Equus: Troubleshooting - Premium AVN System - Body Electrical System - Hyundai Equus VI 2009-2021 Service ManualHyundai Equus: Troubleshooting

Troubleshooting
1.
Items to inspect if the AVN Head Unit, Front Monitor, or Rear Monitor fails.
Symptom
Possible causes
Defects and checkpoints
Notes
Faulty Monitor screen
1.
Faulty connection between the AVN Head Unit and the Monitor.
2.
Faulty LCD Monitor 
1.
Check the LVDS cable connection between the AVN Head Unit and the Monitor.
2.
Replace the LCD module and check if the errors persist.
x
The screen is not photosensitive.
1.
The Auto Light signal (CAN signal) does not turn on (faulty wiring or faulty CAN communication).
2.
"Day Mode" is enabled in the Screening Configuration menu.
1.
Check the 42-pin connector wiring behind the AVN Head unit (CAN signal B1 and B13) for errors (check the CAN message of the vehicle).
2.
If "Day Mode" is enabled in the Screening Configuration menu, you must enable "Automatic Photosensitivity" to access the interlocking function.
x
The electric discharge message continues to appear.
1.
The engine has not started.
2.
Faulty CAN communication
1.
Ensure that the engine has started.
2.
Check the 42-pin connector cables behind the AVN Head unit (CAN signal line B1 and B13) for errors (check the CAN message of the vehicle).
x
Driving restriction message continues to appear.
1.
The driving conditions for restriction removal are not satisfied.
2.
Faulty wiring or faulty CAN communication
1.
Restriction removal conditions: The ACC is on while the engine is off. If the engine is on, the gear shifter is in the P position (automatic).
2.
Check the CAN communication wiring (42 pin connector B1 and B13) for errors (check the CAN message of the vehicle).
x
The screen displays "Preparing..." message, but it does not display any navigation information.
1.
Faulty MAP data
2.
Faulty APP data
1.
Update the MAP data.
2.
Update the APP data.
x
No GPS signal is being received.
1.
Faulty Integrated Antenna
2.
Check the GPS antenna connector connection.
3.
Check the voltage of the GPS antenna.
4.
Check whether the vehicle is located in a covered area.
1.
Replace the Integrated Antenna.
2.
Ensure that the GPS antenna is connected correctly.
3.
Ensure that the center pin of the GPS connector has a voltage of 5 V.
4.
Indoor areas, such as underground parking lots, cannot receive GPS signals.
x
After updating, the screen freezes when the logo appears.
1.
Updating did not finish successfully.
1.
Insert the USB stick that contains the update file and press the RESET key. The update resumes from where the previous update stopped.
x
The system fails to recognize the external USB.
1.
The USB cable connection between the AVN Head Unit and the AUX terminal is faulty or damaged.
2.
The AUX terminal is faulty.
3.
Check whether the AVN set has USB power.
4.
The USB media is faulty.
1.
Connect any disconnected parts and repair or replace any damaged parts.
2.
Replace the AUX terminal.
3.
Check whether pin 1 of the AVN Head Unit USB connector has a voltage of 5 V.
4.
Insert another USB media device.
x
The system fails to recognize the iPod or iPhone.
1.
The wrong cable is connected.
2.
You are using an inauthentic cable.
3.
The iPod software is out of date.
4.
Check the USB signal.
1.
Since the premium AVN has a digital interface, you should use an authentic cable, such as the one that comes with your iPod or iPhone.
2.
Connect the device using an authentic cable.
3.
Update the iPod to the latest software.
4.
Check the USB signals of the USB cable and AUX terminal.
x
Unable to establish a Bluetooth connection.
1.
The Bluetooth signal is low.
2.
A shielding substance is located near the Bluetooth antenna
1.
Since not all Bluetooth devices are supported, use a compatible device to establish the connection.
2.
Remove any factors that may lower the signal reception of the Bluetooth antenna.
x
The system does not recognize the external AUX device.
1.
The USB cable connection between the AVN Head Unit and the AUX terminal is faulty or damaged.
2.
The AUX terminal is faulty.
3.
The USB cable is disconnected.
1.
Connect any disconnected parts and repair or replace any damaged parts.
2.
Replace the AUX terminal to determine if it is faulty.
3.
If the USB cable is not connected, the AUX terminal does not receive any power and cannot transfer AUX signals.
x
The navigation voice guide does not work.
1.
The connection between the AVN and the digital amp is faulty.
2.
The digital amp is faulty.
3.
Check the configuration of the navigation voice guide.
4.
Check the output from the 42 pin connector on the AVN Head Unit.
1.
Check the connector and its connection, and then check for disconnected cables.
2.
Replace the digital amp.
3.
Check whether the voice guide volume is set to '0' or mute in the navigation menu.
4.
Check whether the A13 and A12 pins of the 42 pin connector behind the AVN Head Unit receive the voice guide signal. (This is an analog signal, so measure it using an oscilloscope.)
Set the navigation volume to hear the navigation voice guide while the vehicle is stationary.
No sound is output via an MP3, DivX.
1.
The connection between the AVN and the digital amp is faulty.
2.
The digital amp is faulty.
3.
Check the AV sound configuration.
4.
Check the output from the 42 pin connector on the AVN Head Unit.
1.
Check the connector and its connection, and then check for disconnected cables.
2.
Replace the digital amp (the amp is located on the right side of the trunk.)
3.
Check whether the AV volume is set to '0' or mute.
4.
Check whether the A6 and A15 pins of the 42 pin connector behind the AVN Head Unit produce an SPDIF output. (This is a Differential signal, so measure it using an oscilloscope.)
Check the signals while the media is on.
Voice recognition does not work.
1.
The system fails to receive a signal input from the microphone.
2.
The microphone power is faulty.
3.
The microphone unit is faulty.
1.
Check the connection between the AVN and the microphone. (Head Unit 42 pin connector MIC MIC+(B10), MIC-(B22))
2.
Ensure that the B10 pin of the 42P connector behind the AVN Head Unit has a voltage of 3-4 V.
3.
Replace the microphone unit, and then perform the test again. 
x
The button light does not turn on.
1.
The partial light does not turn on.
2.
The light does not turn on entirely.
1.
Replace the LED for the button.
2.
Check ILL+ (A8) and ILL- (A17) on the wiring diagram.
x
The camera display only shows a blue screen.
1.
Faulty camera
2.
Unable to connect the PGS/AVM and the camera.
3.
Check the camera video signal HU input line.
1.
Replace the camera.
2.
Check the camera connection, and then check for any disconnected wires.
3.
Check the input line (42p connector A2 and A3) of the Head Unit and the camera signal.
x
The rear camera does not work when the gear shifter is in the R position.
1.
The reverse gear signal is faulty.
1.
Check the multimedia CAN signal message and ensure that it works properly.
x
The RESET button does not work.
1.
Operator error
1.
Press down the RESET button for 2-3 seconds to activate it.
x
Broadcasting signal reception failure
1.
Antenna input failure
2.
DIF tuner failure
1.
Check the connection between the antenna cable and the AVN Head Unit
2.
Replace the tuner.
x
CD/DVD loading failure
1.
Deck failure
2.
Deck connection failure
1.
Replace the deck.
2.
Check the cable connecting the deck to the CPU PCB. This is a unidirectional cable, so ensure that it is correctly connected to the CPU and the deck (the cable indicates which ends connect to the CPU and the deck).
x
The front monitor does not display anything.
1.
Faulty wiring or faulty CAN communication
2.
B+ and ACC connection error
3.
LVDS video cable connection failure
1.
Check the CAN communication signal. Check pins 6 and 15 of the connector behind the Monitor unit.
2.
Check the B+ (pins 1 and 2), ACC (pin 3), and GND (pin 7) connections for the front monitor.
3.
Check the video cable connection.
x
The rear monitor does not display anything.
1.
Faulty wiring or faulty CAN communication
2.
B+ and ACC connection error
3.
LVDS video cable connection failure
4.
Check the Video Distributor power and connection.
5.
Check the rear monitor configuration in the AVN system configuration menu.
1.
Check the CAN communication signal. Check pins 2 and 3 of the connector behind the rear monitor unit.
2.
Check the B+ (pin 1), ACC (pin 5), and GND (pin 8) connections for the rear monitor.
3.
Check all of the video cable connections.
4.
Check the Video Distributer power (B+ (pin 1) and ACC (pin 2)). Check the video cable connection.
5.
Check whether the rear monitor is "OFF" in the AVN system configuration menu.
x

2.
Items to inspect if the front or rear keyboard fails.
Symptom
Possible causes
Defects and checkpoints
Notes
The button light does not turn on.
1.
The partial light does not turn on.
2.
The light does not turn on entirely.
1.
Check the LED of the button.
2.
Check the (+) and (-) connection of the light on the wiring diagram.
x
Buttons do not work.
1.
Faulty wiring or faulty CAN communication
2.
The ACC is not connected properly.
1.
Check the CAN communication signal. Check pins 1 and 7 of the connector behind the Central Key unit.
2.
Check the ACC connection.
x
Jog dial operation failure (rotation, push, 8-direction key)
1.
Faulty wiring or faulty CAN communication
2.
The ACC is not connected properly.
1.
Check the CAN communication signal, pins 1 and 7 of the connector behind the Central Key unit, and the connecting harness between the jog dial assembly and the main PCB.
2.
Check the ACC connection.
x
The rear keyboard does not work.
Rear keyboard lock configuration in the AVN system configuration menu
Check the rear keyboard lock configuration in the AVN system configuration menu.
x

3.
Items to inspect if the external amp fails.
Symptom
Possible causes
Defects and checkpoints
Notes
No sound in each mode
1.
Faulty wiring or faulty CAN communication
2.
SPDIF input wire failure
3.
No power is applied.
1.
Check the CAN communication signal, and then check A5 and A6 of unit connector.
2.
Check the SPDIF input (A18, A19).
3.
Check the B+ (A1, A2), ACC (A7), and GND (A14, A15, A16) connections.
x
No voice guide for the navigation.
1.
Faulty wiring or faulty CAN communication
2.
Voice source input wire failure
3.
No power is applied.
1.
Check the CAN communication signal, and then check A5 and A6 of unit connector.
2.
Check the voice source input (A11 and A24).
3.
Check the B+ (A1, A2), ACC (A7), and GND (A14, A15, A16) connections.
x

A Video Distributor is a unit that receives a digital video signal (LVDS) from the AVN Head Unit and distributes it to the left and right rear monitors.
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