Unit Check

Unit Check 

Some of the tests and screens that are displayed under the Unit Check are different from the more detailed checks listed under other menu options.

To start the test, select the item you want to check.

• ECU Info
• Display
• SXM^*
• HFL
• Rear Camera
• B-CAN
• GPS
• Remote Tuner
• TCU^*
• CD/DVD Mech
• F-CAN
• Mic/STRG
• AMP
• USB
• Car Status
• Error History
• HDD
• Yaw Sensor
• Hard Key
• Speaker Check

*: With AcuraLink

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ECU Info 

This diagnosis checks for problems in the navigation ECU. When you start this diagnosis, the audio-navigation unit may freeze or delay up to a minute while the diagnosis runs.

• D-RAM: Displays the result of the access to the D-RAM (OK/NG).
• • To check the D-RAM, select D-RAM Check, then select Yes on the confirmation screen. While checking, do not press the engine start/stop button to select the ACC mode or the OFF mode. The system resets automatically.
  • Recheck the ECU Info diagnosis. If D-RAM shows NG, replace the audio-navigation unit .
• Program (Flash, HDD, DVD): Displays the version of the each software.
• Serial No.: Displays the audio-navigation unit serial number. That should be the same as the serial number found on the upper side of the audio-navigation unit.
  NOTE:

  If the serial number displayed does not match the serial number found on the upper side of the audio-navigation unit, the annual navigation map update activation key may not work when updating the navigation map. In order for a navigation map update activation key to work, both number must match.

• DB Version: Displays the version of the database in the HDD.
• HDD Version: Displays the version of the HDD.
• Flash: Displays the result of the access to the flash memory (OK/NG). If NG, replace the audio-navigation unit .
• Model: For this vehicle and trim level, the field should begin with TX4.
• Coverage: Displays the destination market of the audio-navigation unit.

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Display 

This diagnosis does additional checks on the GA-Net bus between the audio-navigation unit and the center display unit. This test also checks the internal electronic functions.

• If Connection shows NG, Check for hard error codes .
• Version: Displays the software version of the center display unit.
• If ROM or RAM shows NG, replace the center display unit .

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SXM (With AcuraLink) 

This diagnosis checks the GA-Net bus between the audio-navigation unit and the tuner unit. the XM receiver has been integrated with the tuner unit.

If the GA-Net bus connection is OK, the system checks the XM antenna connection.

• If GA-NET shows NG, check for hard error codes .
• If XM Antenna shows NG, Refer to: AUDIO SYSTEM SYMPTOM TROUBLESHOOTING - ERROR CODE: CHECK ANTENNA IS DISPLAYED (2013-17) & AUDIO SYSTEM SYMPTOM TROUBLESHOOTING - ERROR CODE: CHECK ANTENNA IS DISPLAYED(WITH NAVIGATION) (2016-17) .

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HFL 

This diagnosis checks first whether the telematics control unit or the HandsFreeLink control unit is connecting to the audio-navigation unit via the GA-Net bus. With AcuraLink, HandsFreeLink control unit is built into the telematics control unit.

• If HFL shows B1792, go to the HFL DTC B1792 troubleshooting - Refer to: DTC Troubleshooting: B1792 (2013-17), or DTC Troubleshooting: B1792(USA and Canada models with navigation) (2016-17) .
• If HFL and GA-NET shows NG, HANDSFREELINK SYSTEM SYMPTOM TROUBLESHOOTING - HFL DOES NOT RESPOND(WITH NAVIGATION) (2013-15) , HANDSFREELINK SYSTEM SYMPTOM TROUBLESHOOTING - HFL DOES NOT RESPOND(WITH NAVIGATION) (2016-17) , & HANDSFREELINK SYSTEM SYMPTOM TROUBLESHOOTING - HFL DOES NOT RESPOND(WITHOUT NAVIGATION) (2013-17) .
• If USB shows NG:
  NOTE:

  USB in this instance is referring to the HFT USB communication bus protocol between the telematics control unit or the HandsFreeLink control unit and the audio-navigation unit. It is not related to the USB port for the audio-navigation unit.

• • Without AcuraLink, HANDSFREELINK SYSTEM SYMPTOM TROUBLESHOOTING - PHONE BOOK, TXT/E-MAIL DOES NOT WORK (2016-17) .
  • With AcuraLink, check for hard error codes .
• Physical Address: Displays the telematics control unit or the HandsFreeLink control unit physical address (8E).
• S/W Version: Displays the telematics control unit or the HandsFreeLink control unit software version.
• Part Number: Displays the telematics control unit or the HandsFreeLink control unit parts number.

Check any official Honda service website to see if there are any updates available for the telematics unit or the HandsFreeLink control unit. If there are software updates available, do the Telematics Control Unit Update  or the HandsFreeLink Control Unit Update - Refer to: HandsFreeLink Control Unit Update (2013-17),  or HandsFreeLink Control Unit Update(With navigation) (2016-17) .

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Rear Camera 

This diagnosis checks the rearview camera connection.

• If Connection shows NG, check for hard error codes .
• If Connection shows OK, press the AUDIO button to display the rearview camera image. To return to the previous screen, press the AUDIO button again.

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B-CAN 

This diagnosis checks whether the audio-navigation unit has received specific B-CAN data. If ERROR STATUS shows NO ERROR, an error is not detected between the B-CAN bus and the audio-navigation unit.

• If ERROR STATUS shows RAM ERROR, replace the audio-navigation unit .
• If the audio-navigation unit detects the B-CAN data reception error, ERROR Status shows RX ERROR.
• If ERROR STATUS shows TIME OUT, There is a possibility that some items are NG (red icon). When all the items from each transmitting unit is NG, check for B-CAN DTCs with the HDS. If DTCs not detected, check for continuity in the B-CAN lines between the audio-navigation unit and the transmitting unit.

Target ID for Connection Check	Transmitting Unit
ACINFO	Climate control unit
MICU_ICU	MICU
ILLUMI	Gauge control module

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GPS 

This diagnosis checks the GPS antenna connection and the GPS receiver condition.

• If Antenna shows NG, check for hard error codes .
• If Receiver in Navi ECU shows NG, replace the audio-navigation unit .
• Select Information to see the GPS satellite details.

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Remote Tuner 

This diagnosis shows the external radio tuner (AM/FM) status.

• Current Frequency can be changed by selecting TUNE.
• Source can be changed in this order: FM→AM→FM by selecting Change.
• Electric Field Intensity: Displays radio reception sensitivity (dBμV).
• ANT +B: Changes the AM/FM antenna power status ON or OFF.
• RDS BER: Displays the number of RDS error that is receiving.
• F-Check: Changes the station list automatic updating operation status ON or OFF.
• Antenna: If the vehicle has a diversity antenna, you can select the radio antenna function from Auto, Main, Sub, or PD (diversity).
• Version: Displays the tuner unit software version.
• Serial No.: Displays the tuner unit serial number.
• Part No.: Displays the tuner unit parts number.
• Database Clear: The Station list in the tuner unit can be cleared by selecting Clear.
• HD Function: Changes the HD Radio^(TM) function status YES or NO.

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TCU (With AcuraLink) 

This diagnosis shows the telematics control unit information via the USB between the audio-navigation unit and the telematics control unit.

• Drawing Number: Displays the telematics control unit drawing number.
• Serial Number: Displays the telematics control unit serial number. That should be the same as the serial number found on the upper side of the telematics control unit.
• S/W Version: Displays the telematics control unit software version.
• VIN: Displays the VIN number that received from the B-CAN.
• IMSI: Displays the International Mobile Subscriber Identity (MAX 15 digits)
• Phone Module: Displays the phone module status (Active or Deactive)
• PRL Version: Displays the Preferred Roaming List version

These diagnosis checks the telematics control unit status.

• DTCs: Checks the telematics system DTCs. Go to AcuraLink General Troubleshooting Information .
• TEL Info: Displays the phone module information.
• Log: Displays the event log data (Type, Data, Time, Code) of the telematics control unit.
• Test: Checks the SMS function. Go to AcuraLink Self-Diagnostic Function .
• Reflash: Do not use this selection on this vehicle.

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TEL Info 

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TCU Log 

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CD/DVD Mech 

This diagnosis checks the audio-navigation unit internal CD/DVD player mechanism.

Version shows CD/DVD mech version. When the audio-navigation unit can read the version number, Connection shows OK. If the version number cannot be read, Connection shows NG.

• Inserting the CD/DVD mech update disc allows you to select Download. Otherwise it is grayed out.
• To update the CD/DVD mech, you must insert the update disc before selecting this screen. If you insert the update disc when you are on this diagnosis, the DownLoad stays grayed out. In this case, exit the CD/DVD Mech screen and start the diagnosis again.

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F-CAN 

This diagnosis checks whether the audio-navigation unit has received specific F-CAN data. If ERROR STATUS shows NO ERROR, an error is not detected between the F-CAN bus and the audio-navigation unit.

• If ERROR STATUS shows RAM ERROR, replace the audio-navigation unit .
• If the audio-navigation unit detects the F-CAN data reception error, ERROR Status shows RX ERROR.
• If ERROR STATUS shows TIME OUT, There is a possibility that some items are NG (red icon). When all the items from each transmitting unit is NG, check for F-CAN DTCs with the HDS. If DTCs not detected, check for continuity in the F-CAN lines between the audio-navigation unit and the transmitting unit.

Target ID for Connection Check	Transmitting Unit
METER_MID_INFO	Gauge control module

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Mic/STRG SW 

This diagnosis checks whether the microphone is connecting to the telematics control unit or the HandsFreeLink control unit, and checks whether the HFL switch is communicating with the audio-navigation unit.

• If Mic shows HFL DTCs (B1775 or B1776), go to the indicated HFL DTC troubleshooting.
• If Mic shows NG, the GA-net bus connection may be open or short. Check for hard error codes .
• If STRG SW shows HFT DTCs (B1779 or B1780), go to the indicated HFT DTC troubleshooting.

When Mic shows OK, press the PICK-UP, HANG-UP/BACK, and TALK buttons. As each button is pressed, the corresponding icon on the display should turn green.

• If any icon does not briefly turn green, replace the audio remote-HFL switch , and recheck.
• If all the icons do not turn green, check for HFL DTCs - Refer to: How to Troubleshoot the HandsFreeLink System (2013-17),  or How to Troubleshoot the HandsFreeLink System(With navigation) (2016-17) .

If you check the Mic Level, press the TALK button on the steering wheel, wait until Now Recording! is indicated, and in a normal voice say "testing". The Mic Level indicator on the screen should momentarily turn green. If there is no Mic Level movement when you speak, check for hard error codes .

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AMP 

This diagnosis checks the stereo amplifier connection.

If Connection shows NG, refer to: AUDIO SYSTEM SYMPTOM TROUBLESHOOTING - NO SOUND IS HEARD FROM ALL THE SPEAKERS (DISPLAY IS NORMAL) (WITH NAVIGATION) (2016-17) , AUDIO SYSTEM SYMPTOM TROUBLESHOOTING - NO SOUND IS HEARD FROM THE SPEAKER(S) (DISPLAY IS NORMAL) (WITH NAVIGATION) (2013-17) , AUDIO SYSTEM SYMPTOM TROUBLESHOOTING - NO SOUND IS HEARD FROM THE SPEAKER(S) (DISPLAY IS NORMAL) (WITHOUT NAVIGATION) (2013-15) , & AUDIO SYSTEM SYMPTOM TROUBLESHOOTING - NO SOUND IS HEARD FROM THE SPEAKER(S) (DISPLAY IS NORMAL) (WITHOUT NAVIGATION) (2016-17) .

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USB Memory Information 

This diagnosis displays the USB memory status that is connected to the audio-navigation unit.

If the USB memory is connected to the USB port, the screen displays the connection status (Inserted/Not Inserted), the USB memory size, and the Product ID, Vender ID.

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Car Status 

Use this screen to confirm that the audio-navigation unit is properly receiving input signals. The displayed value changes each time according to the state of input signal.

Item	Input	Description
VSP	VSP line	1: When the vehicle speed pulse is received from the PCM 0: When the vehicle speed pulse is not received from the PCM
ILL	B-CAN lines (from gauge control module)	1: When parking lights, or headlights are on 0: When parking lights, or headlights are off
PARK	B-CAN lines	1: When the parking brake is applied 0: When the parking brake is not applied
IGNITION	B-CAN lines	1: When the vehicle is in the ON mode 0: When vehicle is in the ACC mode
BACK	BACK LT line	1: When the transmission is shifted to R position/mode 0: When the transmission is shifted to any position/mode other than R position/mode

Item	Input	Description
ILL CANCEL	B-CAN lines	1: When the dashlights brightness control is more than 90 % brightness with the parking lights turned on 0: When the dashlights brightness control is less than 90 % brightness with the parking lights turned on
REAR DEF	B-CAN lines	1: When the rear window defogger is working 0: When the rear window defogger is not working
ILL DUTY	B-CAN lines (from gauge control module)	With the parking lights on, use the dashlights brightness control to dim and brighten the gauge. The value changes from 1 (max low) to 22 (max high).
FOB	B-CAN lines	0 to 2 (display notification ID)
RECEIVED VIN NO	B-CAN lines	This item indicates the VIN that received from the PCM.
INTERNAL REGISTRATION VIN NO	B-CAN lines	This item indicates the initial registration VIN that is saved in the audio-navigation unit.
ADDITIONAL REGISTRATION VIN NO	B-CAN lines	This item indicates the additional registration VIN when the audio-navigation unit is substituted into another vehicle, or when a PCM is substituted or replaced into this vehicle.

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Error History 

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

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HDD 

This diagnosis checks the HDD mount error and the HDD temperature, and displays a list of total and free capacities of each partition.

If HDD Status shows NG, check for hard error codes .

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Yaw Sensor 

This diagnosis checks the gyro functionality based on the two voltages Sensor and Offset. For more information, see the Yaw Rate diagnosis.

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Hard Key 

This diagnosis tests the interface dial, the center switch panel buttons that surround it, and the audio remote-HFL switch.

To complete the each test, control the audio remote-HFL switch, press the center switch panel buttons, and move the interface dial to each indicated position. As each function is tested, the corresponding button on the display should highlight. To exit, press in and hold the interface dial knob.

If the test cannot be completed, the corresponding icon on the Hard Key menu screen shows red.

• Steering Key: Checks the audio remote-HFL switch buttons.
• Hard Key: Checks the center switch panel buttons and the interface dial.

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Select Steering Key 

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Select Hard Key 

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Speaker Check 

This diagnosis checks the audio speakers individually.

Selects NEXT or BACK to select Speaker. A tone should sound from the speaker.

When you select NEXT, the system checks the speakers in this order: 1→2→3→4→5→6→7→8→9→10→11→1

When you select BACK, the system checks the speakers in this order: 1→11-10→9→8→7→6→5→4→3→2→1

	Display Message	Vehicle Test Condition
	FR L	You should hear a tone from the driver's door speaker
	CNT	You should hear a tone from the front center speaker
	FR R	You should hear a tone from the front passenger's door speaker
	RR R	You should hear a tone from the right rear door speaker
	SWF	You should hear a tone from the subwoofer
	RR L	You should hear a tone from the left rear door speaker
	FRTW L	You should hear a tone from the left tweeter
	FRTW R	You should hear a tone from the right tweeter
	SUR L	You should hear a tone from the left satellite speaker
	SUR R	You should hear a tone from the right satellite speaker
	ALL	You should hear a tone from all speakers

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