Audio system sound is weak or distorted (display is normal)

NOTE: 

• Check the vehicle 12 volt battery condition first .
• Check the connectors for poor connections or loose terminals.

1. Problem verification

   -1. Turn the vehicle to the ON mode.

   Go into the System Diagnostic Mode, and use the speaker check mode.

   • With navigation
   • Without navigation 

   Is there tone from the speakers, and is the tone quality normal in each channel?

   YES 

   Intermittent failure, the system is OK at this time.

   NO: With stereo amplifier

   The failure is duplicated, go to step 2.

   NO: Without stereo amplifier

   The failure is duplicated, go to step 5.

2. Determine possible failure area (speaker lines, others)

   -1. Turn the vehicle to the OFF (LOCK) mode.

   -2. Disconnect the following connectors.

   Stereo amplifier connector A (18P)

   -3. Measure the resistance between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	Stereo amplifier connector A (18P): disconnected

   Test point 1:Stereo amplifier connector A (18P)	Test point 2:Stereo amplifier connector A (18P)	Resistance
   No. 2	No. 4	About 2 Ω
   No. 5	No. 6	About 4 Ω
   No. 7	No. 8	About 4 Ω* 1 About 3.2 Ω* 2
   No. 9	No. 10	About 4 Ω* 1 About 3.2 Ω* 2
   No. 12	No. 13	About 4 Ω
   No. 14	No. 15	About 3.2 Ω
   No. 16	No. 17	About 3.2 Ω

   *1: Connect rear door speaker connector and disconnect rear tweeter connector.

   *2: Disconnect rear door speaker connector and connect rear tweeter connector.

   Is the resistance OK?

   YES 

   Go to step 4.

   NO 

   Go to step 3.

3. Speaker check

   -1. Test the speaker on the faulty speaker lines .

   Is the speaker OK?

   YES 

   Repair a faulty speaker wire(s).

   NO 

   Replace the speaker .

4. Speaker visual check

   -1. Remove the speaker that is duplicating the failure, and check the speaker for any damage.

   Is there any damage?

   YES 

   Replace the speaker .

   NO 

   Replace the stereo amplifier .

5. Determine possible failure area (speaker lines, others)

   -1. Turn the vehicle to the OFF (LOCK) mode.

   -2. Disconnect the following connectors.

   Audio-navigation unit connector A (24P) (with navigation) Audio unit connector A (24P) (without navigation)

   Left front tweeter 2P connector

   Right front tweeter 2P connector

   Left rear tweeter 2P connector

   Right rear tweeter 2P connector

   -3. Measure the resistance between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	Audio-navigation unit connector A (24P) (with navigation): disconnected Audio unit connector A (24P) (without navigation): disconnected
   	Left front tweeter 2P connector: disconnected
   	Right front tweeter 2P connector: disconnected
   	Left rear tweeter 2P connector: disconnected
   	Right rear tweeter 2P connector: disconnected

   Test point 1:Audio-navigation unit connector A (24P) (with navigation) Audio unit connector A (24P) (without navigation)	Test point 2:Audio-navigation unit connector A (24P) (with navigation) Audio unit connector A (24P) (without navigation)	Resistance
   No. 5	No. 6	About 4 Ω* 1 About 3.2 Ω* 2
   No. 7	No. 8	About 4 Ω* 1 About 3.2 Ω* 2
   No. 15	No. 16	About 4 Ω* 1 About 3.2 Ω* 2
   No. 17	No. 18	About 4 Ω* 1 About 3.2 Ω* 2

   *1: Connect door speaker connector and disconnect tweeter connector.

   *2: Disconnect door speaker connector and connect tweeter connector.

   Is the resistance OK?

   YES: With navigation

   Replace the audio-navigation unit .

   YES: Without navigation

   Replace the audio unit .

   NO 

   Go to step 6.

6. Speaker check

   -1. Test the speaker on the faulty speaker lines .

   Is the speaker OK?

   YES 

   Repair an open in the wire.

   NO 

   Replace the speaker .