Audio System - AM/FM radio display is blank or no station information is displayed(Without Navigation) (2016 2017 2018 2019 2020 2021 2022)

AM/FM radio display is blank or no station information is displayed 

NOTE: 

• Check the vehicle battery condition first .
• Check the connectors for poor connections or loose terminals.

1. Problem verification

   -1. Press the engine start/stop button to select the ON mode.

   -2. Turn on the audio system, and select AM or FM.

   Does the AM or the FM radio station information display blankΩ

   YES 

   The failure is duplicated, go to step 2.

   NO 

   Intermittent failure, the system is OK at this time. If the AM or FM sound is not heard, go to Poor or no sound with AM/FM radio troubleshooting .

2. System Diagnostic Mode check

   -1. Go into the System Diagnostic Mode, and use the System Links to check the Display icon status .

   Is the Display icon green?

   YES 

   Go to step 3.

   NO 

   Go to Center display does not dim or brighten with dimmer troubleshooting .

3. Determine possible failure area (GA+B line, others)

   -1. Press the engine start/stop button to select the OFF mode.

   -2. Disconnect the following connector.

   Tuner unit connector A (20P)

   -3. Measure the voltage between test points 1 and 2.

   Test condition	OFF mode
   	Tuner unit connector A (20P): disconnected
   Test circuit	GA+B
   Test point 1	Tuner unit connector A (20P) No. 16 (BLU)
   Test point 2	Body ground

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

   Is there battery voltage?

   YES 

   The GA+B wire is OK. Go to step 5.

   NO 

   Go to step 4.

4. Open wire check (GA+B line)

   -1. Measure the voltage between test points 1 and 2.

   Test condition	OFF mode
   	Tuner unit connector A (20P): disconnected
   Test circuit	GA+B
   Test point 1	Audio unit connector D (12P) No. 12 (BLU)
   Test point 2	Body ground

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

   Is there battery voltage?

   YES 

   Repair an open in the wire between the audio unit and the tuner unit.

   NO 

   Replace the audio unit .

5. Determine possible failure area (GA GND line, others)

   -1. Check for continuity between test points 1 and 2.

   Test condition	OFF mode
   	Tuner unit connector A (20P): disconnected
   Test circuit	GA GND
   Test point 1	Tuner unit connector A (20P) No. 6 (BRN)
   Test point 2	Body ground

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

   Is there continuity?

   YES 

   The GA GND wire is OK. Go to step 7.

   NO 

   Go to step 6.

6. Open wire check (GA GND line)

   -1. Check for continuity between test points 1 and 2.

   Test condition	OFF mode
   	Tuner unit connector A (20P): disconnected
   Test circuit	GA GND
   Test point 1	Audio unit connector D (12P) No. 6 (BRN)
   Test point 2	Body ground

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

   Is there continuity?

   YES 

   Repair an open in the wire between the audio unit and the tuner unit.

   NO 

   Replace the audio unit .

7. Determine possible failure area (GA SYS ON line, others)

   -1. Reconnect tuner unit connector A (20P).

   -2. Disconnect the following connector.

   HandsFreeLink control unit connector A (32P)

   -3. Measure the voltage between test points 1 and 2.

   Test condition	OFF mode
   	HandsFreeLink control unit connector A (32P): disconnected
   Test circuit	GA SYS ON
   Test point 1	Audio unit connector D (12P) No. 8 (TAN)
   Test point 2	Body ground

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

   Is there about 3.0 V?

   YES 

   The GA SYS ON wire is OK. Go to step 9.

   NO 

   Go to step 8.

8. Open wire check (GA SYS ON line)

   -1. Measure the voltage between test points 1 and 2.

   Test condition	OFF mode
   	HandsFreeLink control unit connector A (32P): disconnected
   Test circuit	GA SYS ON
   Test point 1	Tuner unit connector A (20P) No. 12 (TAN)
   Test point 2	Body ground

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

   Is there about 3.0 V?

   YES 

   Repair an open in the wire between the audio unit and the tuner unit.

   NO 

   Replace the tuner unit .

9. Audio unit check

   -1. Press the engine start/stop button to select the ON mode.

   -2. Measure the voltage between test points 1 and 2.

   Test condition	ON mode
   	HandsFreeLink control unit connector A (32P): disconnected
   Test circuit	GA SYS ON

   Test point 1	Audio unit connector D (12P) No. 8 (TAN)
   Test point 2	Body ground

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

   Is there less than 0.2 V?

   YES 

   Go to step 10.

   NO 

   Replace the audio unit .

10. Open wire check (GA BUS+ line, GA BUS- line)

    -1. Press the engine start/stop button to select the OFF mode.

    -2. Disconnect the following connectors.

    Audio unit connector D (12P)

    Tuner unit connector A (20P)

    -3. Check for continuity between test points 1 and 2.

    Test condition	OFF mode
    	HandsFreeLink control unit connector A (32P): disconnected
    	Audio unit connector D (12P): disconnected
    	Tuner unit connector A (20P): disconnected
    Test circuit	GA BUS+
    Test point 1	Audio unit connector D (12P) No. 7 (BLU)
    Test point 2	Tuner unit connector A (20P) No. 11 (BLU)

    Test circuit	GA BUS-
    Test point 1	Audio unit connector D (12P) No. 1 (PNK)
    Test point 2	Tuner unit connector A (20P) No. 1 (PNK)

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

    Is there continuity?

    YES 

    The GA BUS+ and the GA BUS-  wires are OK. Go to step 11.

    NO 

    There is an open in the wire(s) between the audio unit and the tuner unit. Replace the affected shielded harness.

11. Tuner unit check (substitution)

    -1. Substitute a known-good tuner unit.

    -2. Reconnect all the connectors, and recheck.

    Does the symptom go away?

    YES 

    Replace the original tuner unit.

    NO 

    Replace the audio unit .