HandsFreeLink System - The HFL prompts or incoming call cannot be heard or are weak (HFL information display is normal) (With Navigation) (2013 2014 2015)

The HFL prompts or incoming call cannot be heard or are weak (HFL information display is normal)

NOTE:

Check the vehicle battery condition first .
The HFL volume affects both the prompts and the incoming calls. For example, if you turn down the volume during an incoming call, you also turn down the volume on the HFL prompts. The client may turn down the volume because a call is loud, not realizing they turned down the HFL prompt volume.
Check the connectors for poor connections or loose terminals.

Determine possible failure area (audio system, HFL system)
-1. Press the engine start/stop button to select the ON mode.

-2. Check that the audio system is operating normally, from different audio sources (AM/FM and CD) and the speaker sound levels are normal.

Does the audio system work normally and is the audio output from the speaker normal when playing various audio sources?

YES

Go to step 2.

NO

Go to No sound is heard from the speaker(s) (display is normal) (with navigation) troubleshooting .
Problem verification 1
-1. Compare the voice prompts or the incoming call to a known-good vehicle of the same year/model/trim using the same volume settings.

Are the voice prompts or the incoming call volume and the clarity the same as the client's vehicle?

YES

Intermittent failure, the system is OK at this time.

NO

The failure is duplicated, go to step 3.
Problem verification 2
-1. Do the HFL Self-Diagnostic Function .

Is the HFL prompt played?

YES: "The HFT is OK." is played

Intermittent failure, the system is OK at this time. If possible, have the client demonstrate the issue.

YES: "The HFT is NG." is played

Check for HFL DTCs .

NO

The failure is duplicated, go to step 4.

Shorted wire check (TELEM SIG+ line, TELEM SIG- line)

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

-2. Disconnect the following connectors.

Audio-navigation unit connector B (24P)

HandsFreeLink control unit 32P connector

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

Test condition	OFF mode
	Audio-navigation unit connector B (24P): disconnected
	HandsFreeLink control unit 32P connector: disconnected
Test circuit	TELEM SIG+
Test point 1	HandsFreeLink control unit 32P connector No. 4 (BLU)

Test point 2

Body ground

Test circuit	TELEM SIG-
Test point 1	HandsFreeLink control unit 32P connector No. 20 (PNK)
Test point 2	Body ground

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

Is there continuity?

YES

There is a short to body ground in the wire(s) between the audio-navigation unit and the HandsFreeLink control unit. Replace the affected shielded harness.

The TELEM SIG+ and the TELEM SIG- wires are not shorted to ground. Go to step 5.

Shorted wire check (TELEM SIG+ line to TELEM SIG- line)

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

Test condition	OFF mode
	Audio-navigation unit connector B (24P): disconnected
	HandsFreeLink control unit 32P connector: disconnected
Test circuit	TELEM SIG+, TELEM SIG-
Test point 1	HandsFreeLink control unit 32P connector No. 4 (BLU)
Test point 2	HandsFreeLink control unit 32P connector No. 20 (PNK)

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

Is there continuity?

YES

There is a short in the wires between the audio-navigation unit and the HandsFreeLink control unit. Replace the affected shielded harness.

The TELEM SIG+ and the TELEM SIG- wires are not shorted. Go to step 6.

Shorted wire check (SH TELEM SIG line to another lines)

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

Test condition	OFF mode
	Audio-navigation unit connector B (24P): disconnected
	HandsFreeLink control unit 32P connector: disconnected
Test circuit	SH TELEM SIG, TELEM SIG+
Test point 1	HandsFreeLink control unit 32P connector No. 19 (GRY)
Test point 2	HandsFreeLink control unit 32P connector No. 4 (BLU)

Test circuit	SH TELEM SIG, TELEM SIG-
Test point 1	HandsFreeLink control unit 32P connector No. 19 (GRY)
Test point 2	HandsFreeLink control unit 32P connector No. 20 (PNK)

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

Is there continuity?

YES

There is a short in the wires between the audio-navigation unit and the HandsFreeLink control unit. Replace the affected shielded harness.

The SH TELEM SIG wire is OK. Go to step 7.

Open wire check (TELEM SIG+ line, TELEM SIG- line)

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

Test condition	OFF mode
	Audio-navigation unit connector B (24P): disconnected
	HandsFreeLink control unit 32P connector: disconnected
Test circuit	TELEM SIG+
Test point 1	Audio-navigation unit connector B (24P) No. 8 (BLU)
Test point 2	HandsFreeLink control unit 32P connector No. 4 (BLU)

Test circuit	TELEM SIG-
Test point 1	Audio-navigation unit connector B (24P) No. 21 (PNK)
Test point 2	HandsFreeLink control unit 32P connector No. 20 (PNK)

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

Is there continuity?

YES

The TELEM SIG+ and the TELEM SIG- wires are OK. Go to step 8.

There is an open in the wire(s) between the audio-navigation unit and the HandsFreeLink control unit. Replace the affected shielded harness.

Audio-navigation unit check
-1. Substitute a known-good HandsFreeLink control unit .

-2. Reconnect all the connectors.

-3. Press the engine start/stop button to select the ON mode.

-4. Do the HFL Self-Diagnostic Function .

Do you hear the prompt, "The HFT is OK."?

YES

Replace the original HandsFreeLink control unit.

NO

Replace the audio-navigation unit .