LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Acura >> 2022 >> TLX Base >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Entertainment Systems >> Audio Visual Systems - Service, Testing & Troubleshooting >> Removal and Installation >> Audio And Visual System Diagnostic Mode >> Unit Check (Quick Check)
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Unit Check (Quick Check)

These screens allow you to diagnose the infotainment control unit and related units.

Select the item you want to check, and the test begins. To return to the previous screen, select the RETURN icon.

Unit Check
ICU DISPLAY
INIC MOST NODES
CAN GATEWAYS USB
NFC * TCU
TCU DIAG TELEMATICS DIAG *
HARD KEY ERROR HISTORY
AM/FM/HD RADIO XM
REAR CAMERA LANEWATCH *
MVC RSM *
GPS ANTENNA GYROSCOPE
BLUETOOTH WIFI
HFT-MIC EMMC
APPLE IC PMIC
TOUCHPAD  

*: Not supported

ICU 

This diagnosis checks for problems in the infotainment control unit processor.

When the diagnosis is OK, the information of the infotainment control unit processor is displayed.

GHH476600Courtesy of HONDA, U.S.A., INC.

Display 

This diagnosis checks the digital bus (LVDS) connection between the infotainment control unit and the center display unit.

When the Connection diagnosis is OK, the information of the center display unit is displayed.

GHH476601Courtesy of HONDA, U.S.A., INC.

INIC 

This diagnosis checks for problems in the INIC (Intelligent Network Interface Controller).

This screen contains result of diagnosis for MOST network:

GHH476602Courtesy of HONDA, U.S.A., INC.

Most Nodes 

This diagnosis checks the connection of each MOST connection unit. When the connection diagnosis is OK, displays the information of each unit.

If the Connection diagnosis shows NOT OK, see Most Bus Diagnostics Mode - Refer to: Audio and Visual System Most Bus Diagnostics Mode  or Audio and Visual System Error Codes .

Select the item you want to check, and the test begins. To return to the previous screen, select the RETURN icon.

Most Nodes
METER (HUD) (Gauge Control Module) AMPLIFIER (Stereo Amplifier)
REMOTE TUNER (Tuner Unit) BD (not used)
CD (not used) RCU (not used)
TAU (not used) CECU (not used)

METER (HUD) 

GHH476603Courtesy of HONDA, U.S.A., INC.

CAN Gateways 

NOTE: This diagnosis must have the engine running.

This diagnosis checks whether the infotainment control unit has received specific B-CAN or F-CAN data using the MOST bus.

Select the item you want to check, and the test begins. To return to the previous screen, select the RETURN icon.

CAN Gateways
GATEWAY STATUS FRAME
BODY CLIMATE CONTROL
VEHICLE DIAGNOSTICS  

Gateway Status 

GHH476604Courtesy of HONDA, U.S.A., INC.

USB 

This diagnosis displays the USB device status that is connected to the infotainment control unit.

If the USB memory device is connected to USB port A, the screen displays the USB controller status, the self powered status, and the device status.

When you connect a USB mass storage device, you can see the capacity used and the amount of free space available.

GHH476605Courtesy of HONDA, U.S.A., INC.

TCU (With AcuraLink) 

This diagnosis checks the telematics control unit connection.

If the Connection diagnosis shows NOT OK, go to AcuraLink services do not work troubleshooting - Refer to: AcuraLink Symptom Troubleshooting - AcuraLink services do not work or AcuraLink Symptom Troubleshooting - AcuraLink prompts or operator voice is weak or cannot be heard .

GHH476606Courtesy of HONDA, U.S.A., INC.

TCU Diag (With AcuraLink) 

This diagnosis shows the telematics control unit information via the USB between the infotainment control unit and the telematics control unit.

These diagnosis checks the telematics control unit status.

GHH476607Courtesy of HONDA, U.S.A., INC.

Hard Key 

This diagnosis checks each keys on the touchpad unit, volume and seek switch, audio remote-HFL switch, and the ACC combination switch.

To complete the test, operate each keys. As each function is tested, the corresponding button on the display should highlight. If the test cannot be completed, the corresponding icon on the Hard Key menu screen shows red.

UNIT KEY If the KEY(s) does not Respond
Volume and seek switch Power Refer to appropriate Audio And Visual System Symptom Troubleshooting - Volume And Seek Switch Does Not Work Properly (Touchpad Unit Buttons Work).
Volume Up
Volume Down
Touchpad unit Home
  • Intermittent failure
  • Faulty infotainment control unit
  • Faulty touchpad unit
Back
B-ZONE Card (Menu)
TOUCHPAD
Audio remote-HFL switch Talk If any button of the audio remote-HFL switch does not respond, replace the audio remote-HFL switch .

If all buttons of the audio remote-HFL switch do not respond, Audio And Visual System Symptom Troubleshooting - Audio Remote-Hfl Switch Does Not Work Properly (Touchpad Unit Buttons Work) .

Apps
Steering Back
Mute
Steering Volume Up
LEFT Wheel SW (L Up, L Down, L FWD, L REW, L Push)
Heated steering wheel key
ACC combination switch ACC Distance Go to ACC combination switch test .
LKAS On Off
Cruise Main
Cruise Set
Cruise Resume
Cruise Cancel
RIGHT Wheel SW (L Up, L Down, L FWD, L REW, L Push)
  • Faulty wire harness between the audio remote-HFL switch and the ACC combination switch
  • Faulty ACC combination switch
GHH476608Courtesy of HONDA, U.S.A., INC.

Error History 

If you select the HARD ERROR or the SOFT ERROR, you can see the error information. Refer to How to Check for Error History to use this diagnosis .

GHH476609Courtesy of HONDA, U.S.A., INC.

AM/FM/HD Radio 

NOTE: For factory use only. Do not alter any settings unless directed.

This diagnosis displays the tuner unit status and check the function. If the AM/FM Available shows NOT OK, substitute a known-good tuner unit, and recheck .

GHH476610Courtesy of HONDA, U.S.A., INC.

XM (With XM) 

This diagnosis checks the XM tuner connection. The XM tuner is built into the tuner unit.

If the Connection diagnosis shows NOT OK, substitute a known-good tuner unit, and recheck .

GHH476611Courtesy of HONDA, U.S.A., INC.

Rear Camera (Without Multi View Camera System) 

This diagnosis checks the rearview camera connection.

If the Connection diagnosis shows NOT OK, refer to appropriate Audio And Visual System Symptom Troubleshooting - Rearview Camera Image Does Not Come On.

GHH476612Courtesy of HONDA, U.S.A., INC.

MVC (Multi View Camera) (With Multi View Camera System) 

This diagnosis checks the multi view camera unit connection.

If the Connection diagnosis shows NOT OK, go to Multi View Camera System troubleshooting .

GHH476613Courtesy of HONDA, U.S.A., INC.

GPS Antenna 

This diagnosis checks the roof antenna (GPS) connection.

If the Connection diagnosis shows NOT OK, the GPS antenna may be faulty. refer to appropriate Audio And Visual System Symptom Troubleshooting - No Gps Reception Or Interference.

Select the INFORMATION icon to see the GPS information screen.

GHH476614Courtesy of HONDA, U.S.A., INC.

The GPS information screen shows the current status of GPS reception. The circular diagram shows the current location of the GPS satellites (yellow numbers) as they would appear in the sky. The outer circle represents the horizon (0 degrees elevation). The middle and inner circles represents 30 and 60 degrees respectively. The very center of the diagram (90 degrees elevation) is directly overhead. Nearby obstructions, like tall buildings will block satellites in that direction. That is why it is necessary to be in an open area to effectively troubleshoot GPS reception issues.

NOTE: When you use this screen for troubleshooting, park the vehicle outside, away from buildings, tall trees, and hightension wires for at least 10 minutes with the engine running.
GHH476615Courtesy of HONDA, U.S.A., INC.

Gyroscope 

This diagnosis checks the gyro sensor in the infotainment control unit. This devices detect how the vehicle moves, and repositions the vehicle position icon on the map screen.

GHH476616Courtesy of HONDA, U.S.A., INC.

Bluetooth 

This diagnosis checks for problems in the Bluetooth module. When the diagnosis is OK, displays the information of the Bluetooth module.

NOTE: Link-Key indicates when linking a Bluetooth cell phone to the infotainment control unit.
GHH476617Courtesy of HONDA, U.S.A., INC.

WIFI 

This diagnosis checks for problems in the Wi-Fi module. When the diagnosis is OK, displays the information of the Wi-Fi module.

NOTE: These items indicate when linking a Wi-Fi device or a Wi-Fi access point to the infotainment control unit.
GHH476618Courtesy of HONDA, U.S.A., INC.

HFT-Mic 

This diagnosis allows you to test the microphone. To properly check the microphone, make sure you are sitting in the driver's seat.

NOTE: Before this diagnosis, check the response of the TALK button on the audio remote-HFL switch by the Hard Key diagnosis.
GHH476619Courtesy of HONDA, U.S.A., INC.

EMMC 

This diagnosis checks connection to the EMMC (Embedded Multi Media Card). When you start this diagnosis, the infotainment control unit may freeze or delay up to a minute while the diagnosis runs.

The diagnostics result can be exported to the USB memory that connected to USB port A.

GHH476620Courtesy of HONDA, U.S.A., INC.

Apple IC 

This diagnosis checks for problems in the Apple IC. When the diagnosis is OK, displays the information of the Apple IC.

GHH476621Courtesy of HONDA, U.S.A., INC.

PMIC 

This diagnosis checks for problems in the PMIC. When the diagnosis is OK, displays the information of the PMIC.

GHH476622Courtesy of HONDA, U.S.A., INC.

Touchpad 

This diagnosis checks the digital bus (RS485) connection between the infotainment control unit and the touchpad unit.

When the Connection diagnosis is OK, displays the information of the touchpad unit.

GHH476623Courtesy of HONDA, U.S.A., INC.