NO.10 SOUND JUMPS [ENTIRE AUDIO SYSTEM]

id0903e2946500

10 | Sound jumps
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Possible DTC | Using the M-MDS | B1188:64
Without using M-MDS (On-board diagnostic test mode) | 10: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 (with Bluetooth system) • 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
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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 | Replace the audio unit. (See AUDIO UNIT REMOVAL/INSTALLATION.)
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 | Replace the audio unit. (See AUDIO UNIT REMOVAL/INSTALLATION.)
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 | Replace the audio unit. (See AUDIO UNIT REMOVAL/INSTALLATION.)
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 ― Terminal 3L (LH+)—Terminal B ― Terminal 3N (LH-)—Terminal A ― Terminal 3K (RH+)—Terminal B ― Terminal 3M (RH-)—Terminal A For front speaker ― Terminal 3B (LH+)—Terminal B ― Terminal 3A (LH-)—Terminal A ― Terminal 3D (RH+)—Terminal B ― Terminal 3F (RH-)—Terminal A For rear door speaker ― Terminal 3I (LH+)—Terminal B ― Terminal 3G (LH-)—Terminal A ― Terminal 3C (RH+)—Terminal B ― Terminal 3E (RH-)—Terminal A For rear speaker ― Terminal 4G—Terminal B ― Terminal 4E—Terminal A ― Terminal 4D—Terminal B ― Terminal 4C—Terminal A For center speaker ― Terminal 3H—Terminal B ― Terminal 3J—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 ― Terminal 3L (LH+)—Terminal B ― Terminal 3N (LH-)—Terminal A ― Terminal 3K (RH+)—Terminal B ― Terminal 3M (RH-)—Terminal A For front speaker ― Terminal 3B (LH+)—Terminal B ― Terminal 3A (LH-)—Terminal A ― Terminal 3D (RH+)—Terminal B ― Terminal 3F (RH-)—Terminal A For rear door speaker ― Terminal 3I (LH+)—Terminal B ― Terminal 3G (LH-)—Terminal A ― Terminal 3C (RH+)—Terminal B ― Terminal 3E (RH-)—Terminal A For rear speaker ― Terminal 4G—Terminal B ― Terminal 4E—Terminal A ― Terminal 4D—Terminal B ― Terminal 4C—Terminal A For center speaker ― Terminal 3H—Terminal B ― Terminal 3J—Terminal A • Is there continuity? | Yes | Repair or replace the related wiring harness or speaker. (See FRONT DOOR SPEAKER REMOVAL/INSTALLATION.) (See FRONT SPEAKER REMOVAL/INSTALLATION.) (See REAR DOOR SPEAKER REMOVAL/INSTALLATION.) (See REAR SPEAKER REMOVAL/INSTALLATION.) (See CENTER SPEAKER REMOVAL/INSTALLATION.) 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® • Replace the speaker. (See FRONT DOOR SPEAKER REMOVAL/INSTALLATION.) (See REAR DOOR SPEAKER REMOVAL/INSTALLATION.) (See TWEETER REMOVAL/INSTALLATION.) (Six-speaker type ) With Bose® • Replace the speaker. (See FRONT DOOR SPEAKER REMOVAL/INSTALLATION.) (See FRONT SPEAKER REMOVAL/INSTALLATION.) (See REAR DOOR SPEAKER REMOVAL/INSTALLATION.) (See REAR SPEAKER REMOVAL/INSTALLATION.) (See CENTER SPEAKER REMOVAL/INSTALLATION.)
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 | Replace the audio unit. (See AUDIO UNIT REMOVAL/INSTALLATION.)