NO.4 NO SOUND FROM AUDIO SYSTEM [CAR-NAVIGATION SYSTEM]SM2446139
NO.4 NO SOUND FROM AUDIO SYSTEM [CAR-NAVIGATION SYSTEM]

id0903e8910400

4

No sound from audio system
POSSIBLE CAUSE
• Poor connection of car-navigation unit connector, terminal damage
• Open circuit in wiring harness between car-navigation unit and each speaker.
• Speaker malfunction
• Car-navigation unit malfunction


Diagnostic procedure

STEP

INSPECTION

ACTION
1
• Turn the Ignition switch to ACC position.
• Start audio system by pressing the audio system button (AM/FM, DISC), after the map is displayed on the screen.
• Adjust volume to 30 with POWER/VOLUME switch.
• Is there sound from all speaker?
Yes
The system is normal.
No
Go to the next step.
2
• Turn the ignition switch to LOCK position.
• Inspect the connection of car-navigation unit connector (24-pin).
• Is the connector securely connected?
Yes
Go to the next step.
No
Securely connect the car-navigation unit.
3
• Turn the ignition switch to LOCK position.
• Disconnect the car-navigation unit connector (24-pin).
• Inspect both car-navigation unit connector and wiring harness-side connector for poor connection (such as damaged/pulled out pins, corrosion).
• Are all the pins normal?
Yes
Go to the next step.
No
If the car-navigation unit connector is wrong:
• Replace the car-navigation unit. (See CAR-NAVIGATION UNIT REMOVAL/INSTALLATION.)
If the wiring harness-side connector is wrong:
• Repair or replace the pins and/or the connector.
4
• Turn the ignition switch to LOCK position.
• Inspect the connection of each speaker connector (2-pin).
• Are the connectors securely connected?
Yes
Go to the next step.
No
Securely connect the speaker.
5
• Turn the ignition switch to LOCK position.
• Disconnect the all speaker connectors.
• Inspect each speaker and wiring harness-side connector for poor connection (such as damaged/pulled out pins, corrosion.)
• Are all the pins normal?
Yes
Go to the next step.
No
If the speaker connector is wrong:
• Replace the suspect part.
If the wiring harness-side connector is wrong:
• Repair or replace the pins and/or the connector.
6
• Inspect for continuity between following terminals:
― Car-navigation unit terminal 1A (LH+)—audio amplifier terminal 1L
― Car-navigation unit terminal 1C (LH-)—audio amplifier terminal 1J
― Car-navigation unit terminal 1D (RH+)—audio amplifier terminal 1K
― Car-navigation unit terminal 1F (RH-)—audio amplifier terminal 1I
• Is there continuity?
Yes
Go to the next step.
No
Repair or replace the related wiring harness between the audio amplifier and the car-navigation unit.
Then go to the next step.
7
• Inspect the connection of the audio amplifier connector.
• Is the connector connected securely?
Yes
Go to the next step.
No
Connect the audio amplifier securely.
8
• Turn the ignition switch to the LOCK position.
• Disconnect the audio amplifier connector.
• Inspect for continuity between following terminals: Inspect the continuity between the following terminals of the audio amplifier connector and speaker connector.
― Audio amplifier terminal 2A—front speaker (LH-) terminal A
― Audio amplifier terminal 2B—front speaker (LH+) terminal B
― Audio amplifier terminal 2F—front speaker (RH-) terminal A
― Audio amplifier terminal 2D—front speaker (RH+) terminal B
― Audio amplifier terminal 2N—front door speaker (LH-) terminal A
― Audio amplifier terminal 2L—front door speaker (LH+) terminal B
― Audio amplifier terminal 2M—front door speaker (RH-) terminal A
― Audio amplifier terminal 2K—front door speaker (RH+) terminal B
― Audio amplifier terminal 2G—rear door speaker (LH-) terminal A
― Audio amplifier terminal 2I—rear door speaker (LH+) terminal B
― Audio amplifier terminal 2E—rear door speaker (RH-) terminal A
― Audio amplifier terminal 2C—rear door speaker (RH+) terminal B
― Audio amplifier terminal 2J—rear speaker (LH-) terminal A
― Audio amplifier terminal 2H—rear speaker (LH+) terminal B
― Audio amplifier terminal 3F—rear speaker (RH-) terminal A
― Audio amplifier terminal 3H—rear speaker (RH+) terminal B
― Audio amplifier terminal 3E—center speaker (-) terminal A
― Audio amplifier terminal 3G—center speaker (+) terminal B
• Is there continuity?
Yes
Go to the next step.
No
Repair or replace the related wiring harnesses.
9
• Inspect each speaker.
• Are all speakers normal?
Yes
Replace the car-navigation unit.
(See CAR-NAVIGATION UNIT REMOVAL/INSTALLATION.)
No
Replace the malfunctioning speaker.