NO.11 SOUND JUMPS [ENTIRE AUDIO SYSTEM]


id0903e2945400

11

Sound jumps

Possible DTC

Using the M-MDS

B1188:64

Without using M-MDS (On-board diagnostic test mode)

10:Er07, 22:Er07

Possible cause
•  Electronic jamming from outside, or inferior condition of broadcasting station radio wave
•  Defective CD (e.g., cracked, badly bent, rough edges, scratch, dirty CD, condensation)
•  Vibration while vehicle is driven
•  Speaker muted by Bluetooth system (hands-free telephone (HF/TEL) system) operation
•  Open or short circuit in wiring harness between audio amplifier and audio unit
•  Short circuit inside speaker
•  Speaker malfunction
•  Mis-operation of steering switches
•  Audio unit malfunction
Note
•  The CD may be malfunctioning if the sound jumps on the certain CD only. Inspect the CD player/changer operation using the CD known to be good.

Diagnostic procedure

STEP

INSPECTION

ACTION

1
•  Does the sound jump only while in the radio mode?
Yes
Go to Step 2.
No
Go to Step 5.
2
•  Does noise occur?
Yes
Go to the next step.
No
With CD changer
•  Go to Step 15.
With CD player
•  Replace the audio unit.
3
•  Can the location where the sound jumps be specified?
Yes
The system is normal. Explain to the customer that the noise is caused by radio wave disturbances or broadcast wave conditions from the outside.
No
Go to the next step.
4
•  Can the broadcast where the sound jumps be specified?
Yes
Explain to the customer that the cause is poor broadcast reception conditions.
No
With CD changer
•  Go to Step 15.
With CD player
•  Replace the audio unit.
5
•  Does the sound jump only while in the CD mode?
Yes
Go to the next step.
No
Go to Step 8.
6
•  Can the disc in which the sound jump occurs be specified?
Yes
The system is normal. Explain to the customer that the cause is a disc that is damaged or dirty on the playback side, or warped.
No
Go to the next step.
7
•  Drive the vehicle and verify the malfunction symptom.
•  Does noise occur while driving on an unlevel road or under other driving conditions (sudden curve, quick operation)?
Yes
The system is normal. Explain to the customer that the cause is vibration while the vehicle is driven.
No
With CD changer
•  Go to Step 15.
With CD player
•  Replace the audio unit.
8
•  Does the sound jump using the specified speaker?
Yes
Without Bose®
•  Go to the next step.
With Bose®
•  Go to Step 10
No
With Bluetooth system
•  Go to Step 13.
Without Bluetooth system
•  Go to Step 14.
9
•  Disconnect the speaker connector and inspect the resistance of speaker.
•  Inspect the continuity between the audio unit wiring harness-side connector terminal and speaker wiring harness-side connector:
Audio unit—front door speaker
―  Terminal 1A (LH+)—terminal B
―  Terminal 1C (LH-)—terminal A
―  Terminal 1D (RH+)—terminal B
―  Terminal 1F (RH-)—terminal A
Audio unit—rear door speaker
―  Terminal 1S (LH+)—terminal B
―  Terminal 1U (LH-)—terminal A
―  Terminal 1V (RH+)—terminal B
―  Terminal 1X (RH-)—terminal A
Yes
Go to Step 12.
No
Repair or replace the suspect wiring harness or speaker.
10
•  Disconnect the audio amplifier connector.
•  Inspect continuity between the following terminals of the audio amplifier connector and speaker connector.
For front door speaker (LH)
―  Terminal 3D (L.H.D.)/3F (R.H.D.)—terminal B
―  Terminal 3C (L.H.D.)/3E (R.H.D.)—terminal A
For front door speaker (RH)
―  Terminal 3F (L.H.D.)/3D (R.H.D.)—terminal B
―  Terminal 3E (L.H.D.)/3C (R.H.D.)—terminal A
For tweeter (LH)
―   Terminal 3D (L.H.D.)/3F (R.H.D.)—Terminal B
―  Terminal 3C (L.H.D.)/3E (R.H.D.)—Terminal A
For tweeter (RH)
―  Terminal 3F (L.H.D.)/3D (R.H.D.)—Terminal B
―  Terminal 3E (L.H.D.)/3C (R.H.D.)—Terminal A
For rear door speaker (LH)
―  Terminal 2D (L.H.D.)/2M (R.H.D.)—terminal B
―  Terminal 2B (L.H.D.)/2O (R.H.D.)—terminal A
For rear door speaker (RH)
―  Terminal 2M (L.H.D.)/2D (R.H.D.)—terminal B
―  Terminal 2O (L.H.D.)/2B (R.H.D.)—terminal A
For front center speaker
―  Terminal 2I—Terminal B
―  Terminal 2K—Terminal A
For rear center speaker (4SD)/Bass-box (5HB)
―  Terminal 3H (LH+)—terminal B
―  Terminal 3G (LH-)—terminal D
For rear speaker
―  Terminal 2E (LH+)—terminal B
―  Terminal 2G (LH-)—terminal A
•  Is there continuity?
Yes
Go to Step 11.
No
Repair or replace the repair related wiring harnesses.
11
•  Disconnect the audio amplifier connector.
•  Inspect the continuity between the audio amplifier connector and ground:
For front door speaker (LH)
―  Terminal 3D (L.H.D.)/3F (R.H.D.)—GND
―  Terminal 3C (L.H.D.)/3E (R.H.D.)—GND
For front door speaker (RH)
―  Terminal 3F (L.H.D.)/3D (R.H.D.)—GND
―  Terminal 3E (L.H.D.)/3C (R.H.D.)—GND
For tweeter (LH)
―   Terminal 3D (L.H.D.)/3F (R.H.D.)—GND
―  Terminal 3C (L.H.D.)/3E (R.H.D.)—GND
For tweeter (RH)
―  Terminal 3F (L.H.D.)/3D (R.H.D.)—GND
―  Terminal 3E (L.H.D.)/3C (R.H.D.)—GND
For rear door speaker (LH)
―  Terminal 2D (L.H.D.)/2M (R.H.D.)—GND
―  Terminal 2B (L.H.D.)/2O (R.H.D.)—GND
For rear door speaker (RH)
―  Terminal 2M (L.H.D.)/2D (R.H.D.)—GND
―  Terminal 2O (L.H.D.)/2B (R.H.D.)—GND
For front center speaker
―  Terminal 2I—GND
―  Terminal 2K—GND
For rear center speaker (4SD)/Bass-box (5HB)
―  Terminal 3H (LH+)—GND
―  Terminal 3G (LH-)—GND
For rear speaker
―  Terminal 2E (LH+)—GND
―  Terminal 2G (LH-)—GND
•  Is there continuity?
Yes
Repair or replace the related wiring harness or speaker.
Note
•  If there is a short circuit between the speaker harness or speaker lead wire and ground, the protector circuit inside the audio unit operates to cut the sound.
No
Go to the next step.
12
•  Inspect the suspect speaker.
•  Is the speaker normal?
Note
•  If the speaker lead wire contacts to either ground or vehicle frame, replace the speaker.
Yes
With Bluetooth system
•  Go to the next step.
Without Bluetooth system
•  Go to Step 14.
No
Without Bose®
With Bose®
13
•  Does the malfunction occur while the Bluetooth system is operating?
Yes
The system is normal. Explain to the customer that the speaker is muted while the Bluetooth system is operating.
No
Go to the next step.
14
•  Do the steering switches operate?
Yes
The system is normal. Explain to the customer that the cause is mis-operation of the steering switches.
No
With CD changer
•  Go to the next step.
With CD player
•  Replace the audio unit.
15
•  Verify that all of the audio unit reset conditions for the customer's audio unit are met.
•  Are all of the audio unit reset conditions for the customer's audio unit met?
Yes
Perform the audio unit reset.
No
Replace the audio unit.