HandsFreeLink System - HFL switch does not work properly(Without Navigation with Touch Screen) (2019 2020 2021 2022)

HFL switch does not work properly 

NOTE: 

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

1. Problem verification

   -1. Turn the vehicle to the ON mode.

   -2. Using the HFL switch buttons, check if the HFL operates properly.

   Is the HFL operation OK?

   YES 

   Intermittent failure, the system is OK at this time.

   NO 

   The failure is duplicated, go to step 2.

2. Determine possible failure area (audio system, others)

   -1. Turn on the audio system, and using the audio remote switch buttons, check if the audio system operates properly.

   Is the audio system operation OK?

   YES 

   Go to step 3.

   NO 

   Go to Audio remote switch does not work properly (ODMD(TM) (touch screen) and center switch buttons work) troubleshooting .

3. Determine possible failure area (audio remote-HFL switch, others)

   -1. Turn the vehicle to the OFF (LOCK) mode.

   -2. Disconnect the following connector.

   Audio remote-HFL switch 12P connector

   -3. Do the HFL Switch Test .

   Is the HFL switch OK?

   YES 

   Go to step 4.

   NO 

   Replace the audio remote-HFL switch .

4. Shorted wire check (HFT/NAVI REMOTE SW line)

   -1. Disconnect the following connector.

   NOTE:  Eject the disc before disconnecting the audio unit to prevent damaging the CD player's load mechanism.

   Audio unit connector A (24P)

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

   Test condition	Vehicle OFF (LOCK) mode
   	Audio remote-HFL switch 12P connector: disconnected
   	Audio unit connector A (24P): disconnected
   Test circuit	HFT/NAVI REMOTE SW
   Test point 1	Audio unit connector A (24P) No. 14 (BLU)
   Test point 2	Body ground

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

   Is there continuity?

   YES 

   Repair a short to body ground in the wire. If the wire is OK, replace the cable reel .

   NO 

   The HFT/NAVI REMOTE SW wire is not shorted to ground. Go to step 5.

5. Open wire check (HFT/NAVI REMOTE SW line)

   -1. Reconnect the audio remote-HFL switch 12P connector.

   -2. Measure the resistance between test points 1 and 2 as specified in the table.

   Test condition	Vehicle OFF (LOCK) mode
   	Audio unit connector A (24P): disconnected
   Test circuit	HFT/NAVI REMOTE SW, REMOTE SW GND
   Test point 1	Audio unit connector A (24P) No. 14 (BLU)
   Test point 2	Audio unit connector A (24P) No. 11 (BRN)

   HFL SWITCH TABLE 

   Button held down	HANG-UP/BACK	PICK-UP	TALK	(No button pressed)
   Resistance	about47 '	about 222 '	about 2.2 kΩ	about 10 kΩ

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

   Is the resistance OK?

   YES 

   Replace the audio unit .

   NO 

   Repair an open or high resistance in the wire(s). If the wires are OK, replace the cable reel .