Audio System Symptom Troubleshooting - No sound is heard from the speaker(s) (Without Navigation, Without Touch Screen)

1.

Problem verification:

Problem verification

?1.	Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.

?2.	Turn on the audio unit, and check for sound in each mode (AM/FM, AUX, USB, and CD).

Is the sound OK in each mode?


	YES

Intermittent failure, the system is OK at this time. Check for loose connections at the audio unit and speaker(s).?


	NO: No sound is heard in all modes

The failure is duplicated in all modes, go to step 2.


	NO: No sound is heard in AM/FM mode

Go to Poor AM or FM radio reception interference (without navigation, without touch screen) troubleshooting.?


	NO: No sound is heard in AUX mode

Go to Auxiliary input sound is low or cannot be heard (without navigation, without touch screen) troubleshooting.?


	NO: No sound is heard in USB mode

Go to USB input sound is low or cannot be heard (without navigation, without touch screen) troubleshooting.?


	NO: No sound is heard in CD mode

Go to Audio disc does not play troubleshooting.?

2.

Determine possible failure area (BUS lines, others):

Determine possible failure area (BUS lines, others)

?1.	Turn on the audio unit, and select AM or FM mode.

Is there radio station information displayed?


	YES

Go to step 3.


	NO

Go to step 9.

3.

Determine possible failure area (audio unit, others):

Determine possible failure area (audio unit, others)

?1.	Do the Self-Diagnostic Function, and use the speaker check mode.

Did all speakers produce a tone?


	YES

Replace the audio unit.?


	NO

Go to step 4.

4.

Shorted wire check (SPKR lines):

Shorted wire check (SPKR lines)

?1.	Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

?2.

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)

?3.

Check for continuity between these test points and body ground individually.

Test condition	IG LOCK (0) or OFF mode
	Audio unit connector A (24P): disconnected

Connector	Test circuit	Terminal
Audio unit connector A (24P)	FL SPKR?	No. 15 (LT GRN)
	FL SPKR	No. 16 (PNK)
	FR SPKR?	No. 19 (GRY)
	FR SPKR	No. 20 (RED)
	RL SPKR?	No. 5 (YEL)
	RL SPKR	No. 6 (BRN)
	RR SPKR?	No. 9 (BLU)
	RR SPKR	No. 10 (TAN)

Is there continuity?


	YES

Repair a short to body ground in the wire(s) between the audio unit and the speaker(s).?


	NO

The SPKR wires are not shorted to ground. Go to step 5.

5.

Determine possible failure area (speaker, others) 1:

Determine possible failure area (speaker, others) 1

?1.	Check the speaker(s) with no sound for any damage.

Is there any damage?


	YES

Replace the faulty speaker(s).?


	NO

Go to step 6.

6.

Determine possible failure area (speaker, others) 2:

Determine possible failure area (speaker, others) 2

?1.	Test the speaker(s).

Is the speaker(s) OK?


	YES

Go to step 7.


	NO

Replace the faulty speaker(s).?

7.

Open wire check (SPKR lines):

Open wire check (SPKR lines)

?1.	Reconnect the front door speaker 2P connector(s) and the rear speaker 2P connector(s).

?2.

Measure the resistance between test points 1 and 2.

Test condition	IG LOCK (0) or OFF mode
	Audio unit connector A (24P): disconnected

Test circuits	Test point 1: Audio unit connector A (24P)	Test point 2: Audio unit connector A (24P)	Resistance
FL SPKR?, FL SPKR	No. 15 (LT GRN)	No. 16 (PNK)	About 4 ?
FR SPKR?, FR SPKR	No. 19 (GRY)	No. 20 (RED)	About 4 ?
RL SPKR?, RL SPKR	No. 5 (YEL)	No. 6 (BRN)	About 4 ?
RR SPKR?, RR SPKR	No. 9 (BLU)	No. 10 (TAN)	About 4 ?

Is the resistance OK?


	YES

The SPKR wires are not open. Go to step 8.


	NO

Repair an open in the wire between the audio unit and the speaker(s).?

8.

Open wire check (SPKR (Tweeter) lines):

Open wire check (SPKR (Tweeter) lines)

?1.

Connect terminals A and B with jumper wires.

Terminal A	Audio unit connector A (24P) No. 15 (LT GRN)
Terminal B	Audio unit connector A (24P) No. 16 (PNK)

Terminal A	Audio unit connector A (24P) No. 19 (GRY)
Terminal B	Audio unit connector A (24P) No. 20 (RED)

?2.

Check for continuity between test points 1 and 2.

Test condition	IG LOCK (0) or OFF mode
	Audio unit connector A (24P): disconnected
	Left (Right) tweeter 2P connector: disconnected
	Audio unit connector A (24P) No. 15 and No. 16: jumped
	Audio unit connector A (24P) No. 19 and No. 20: jumped
Test circuit	FL SPKR?, FL SPKR
Test point 1	Left tweeter 2P connector No. 1 (PNK)
Test point 2	Left tweeter 2P connector No. 2 (LT GRN)

Test circuit	FR SPKR?, FR SPKR
Test point 1	Right tweeter 2P connector No. 1 (RED)
Test point 2	Right tweeter 2P connector No. 2 (GRY)

Is there continuity?


	YES

Replace the audio unit.?


	NO

Repair an open in the wire(s) between the audio unit and the tweeter.?

9.

Determine possible failure area (related unit, others) 1:

Determine possible failure area (related unit, others) 1

?1.	Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

?2.

Disconnect the following connector.

HandsFreeLink control unit connector A (32P)

?3.	Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.

?4.	Turn on the audio unit, and check for sound in each mode (AM/FM, AUX, USB, and CD).

Is the sound OK in each mode?


	YES

Replace the HandsFreeLink control unit.?


	NO

Go to step 10.

10.

Determine possible failure area (related unit, others) 2:

Determine possible failure area (related unit, others) 2

?1.	Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

?2.

Disconnect the following connector.

Multi-information display unit connector A (12P)

?3.	Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.

?4.	Turn on the audio system, and check for sound in each mode (AM/FM, AUX, USB, and CD).

Is the sound OK in each mode?


	YES

Replace the multi-information display unit.?


	NO

Go to step 11.

11.

Shorted wire check (GA BUS+ line, GA BUS? line):

Shorted wire check (GA BUS+ line, GA BUS? line)

?1.	Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

?2.

Disconnect the following connectors.

Audio unit connector D (12P)

?3.

Check for continuity between test points 1 and 2.

Test condition	IG LOCK (0) or OFF mode
	HandsFreeLink control unit connector A (32P): disconnected
	Multi-information display unit connector A (12P): disconnected
	Audio unit connector D (12P): disconnected
Test circuit	GA BUS+
Test point 1	Audio unit connector D (12P) No. 7 (BRN)
Test point 2	Body ground

Test circuit	GA BUS?
Test point 1	Audio unit connector D (12P) No. 1 (YEL)
Test point 2	Body ground

Is there continuity?


	YES

There is a short to body ground in the GA BUS wire(s). Replace the affected shielded harness.?


	NO

The GA BUS+ and the GA BUS? wires are not shorted to ground. Go to step 12.

12.

Shorted wire check (SH GA BUS line to another lines):

Shorted wire check (SH GA BUS line to another lines)

?1.

Check for continuity between test points 1 and 2.

Test condition	IG LOCK (0) or OFF mode
	HandsFreeLink control unit connector A (32P): disconnected
	Multi-information display unit connector A (12P): disconnected
	Audio unit connector D (12P): disconnected
Test circuit	SH GA BUS, GA BUS+
Test point 1	Audio unit connector D (12P) No. 2 (GRY)
Test point 2	Audio unit connector D (12P) No. 7 (BRN)

Test circuit	SH GA BUS, GA BUS?
Test point 1	Audio unit connector D (12P) No. 2 (GRY)
Test point 2	Audio unit connector D (12P) No. 1 (YEL)

Is there continuity?


	YES

There is a short in the GA BUS wires. Replace the affected shielded harness.?


	NO

The SH GA BUS wire is OK. Go to step 13.

13.

Open wire check (GA BUS+ line, GA BUS? line):

Open wire check (GA BUS+ line, GA BUS? line)

?1.

Check for continuity between test points 1 and 2.

Test condition	IG LOCK (0) or OFF mode
	HandsFreeLink control unit connector A (32P): disconnected
	Multi-information display unit connector A (12P): disconnected
	Audio unit connector D (12P): disconnected
Test circuit	GA BUS+
Test point 1	Audio unit connector D (12P) No. 7 (BRN)
Test point 2	Multi-information display unit connector A (12P) No. 1 (BRN)

Test circuit	GA BUS?
Test point 1	Audio unit connector D (12P) No. 1 (YEL)
Test point 2	Multi-information display unit connector A (12P) No. 2 (YEL)

Is there continuity?


	YES

Replace the audio unit.?


	NO

There is an open in the wire(s) between the audio unit and the multi-information display unit. Replace the affected shielded harness.?