AUXILIARY INPUT SOUND IS LOW OR CANNOT BE HEARD (With Navigation) (2016 2017 2018)

NOTE: 

• Check the vehicle 12 volt battery condition first - Refer to:

12 Volt Battery Test (With Auto Idle Stop System) or

12 Volt Battery Test (Without Auto Idle Stop System) .

• Set the fader and the balance positions to the center.
• Use auxiliary stereo cables with 3.5 mm ends only.
• Check the connectors for poor connections or loose terminals.

1. Problem verification 1

   -1. Turn the vehicle to the ON mode.

   - 2. Turn on the audio system.

   - 3. Connect an auxiliary audio accessory to the auxiliary input jack.

   Does the display change to the AUX mode?

   YES 

   Go to step 2.

   NO 

   The failure is duplicated, go to step 8.

2. Problem verification 2

   -1. Check the auxiliary audio source sound.

   Is the sound normal?

   YES 

   Intermittent failure, the system is OK at this time.

   NO 

   The failure is duplicated, go to step 3.

3. Determine possible failure area (auxiliary audio accessory, others)

   -1. Substitute a known-good auxiliary audio accessory and/or auxiliary stereo cable, and recheck.

   Is the sound normal?

   YES 

   Original auxiliary audio accessory or auxiliary stereo cable is faulty.

   NO 

   Go to step 4.

4. Shorted wire check (AUX SIG GND, AUX RCH, AUX LCH lines)

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

   - 2. Disconnect the auxiliary audio accessory from the auxiliary input jack.

   - 3. Disconnect the following connectors.

   Audio-navigation unit connector B (20P)

   Auxiliary jack assembly 5P connector

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

   Test condition	Vehicle OFF (LOCK) mode
   	Audio-navigation unit connector B (20P) disconnected
   	Auxiliary jack assembly 5P connector: disconnected

   Connector	Terminal
   Audio-navigation unit connector B (20P) - Refer to: Audio-Navigation Unit Connector for Inputs and Outputs (2016) or Audio-Navigation Unit Connector for Inputs and Outputs (2017 2018) .	No. 17
   	No. 18
   	No. 19

   Is there continuity?

   YES 

   There is a short to body ground in the wire(s) between the audio-navigation unit and the auxiliary jack assembly. Replace the affected shielded harness.

   NO 

   The AUX SIG GND, AUX LCH, and AUX RCH wires are not shorted. Go to step 5.

5. Shorted wire check (AUX lines)

   -1. Check for continuity between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	Audio-navigation unit connector B (20P) disconnected
   	Auxiliary jack assembly 5P connector: disconnected

   Test point 1:  Audio-navigation unit connector B (20P) - Refer to: Audio-Navigation Unit Connector for Inputs and Outputs (2016) or Audio-Navigation Unit Connector for Inputs and Outputs (2017 2018) .	Test point 2:  Audio-navigation unit connector B (20P) - Refer to: Audio-Navigation Unit Connector for Inputs and Outputs (2016) or Audio-Navigation Unit Connector for Inputs and Outputs (2017 2018) .
   No. 7	No. 17, No. 18, No. 19
   No. 17	No. 18, No. 19
   No. 18	No. 19

   Is there continuity between any of the terminals?

   YES 

   There is a short in the wires between the audio-navigation unit and the auxiliary jack assembly. Replace the affected shielded harness.

   NO 

   The AUX wires not shorted. Go to step 6.

6. Open wire check (AUX SIG GND, AUX RCH, AUX LCH lines)

   -1. Check for continuity between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	Audio-navigation unit connector B (20P) disconnected
   	Auxiliary jack assembly 5P connector: disconnected

   Test point 1:  Audio-navigation unit connector B (20P) - Refer to: Audio-Navigation Unit Connector for Inputs and Outputs (2016) or Audio-Navigation Unit Connector for Inputs and Outputs (2017 2018) .	Test point 2:  Auxiliary jack assembly 5P connector - Refer to: Auxiliary Jack Assembly Connector For Inputs And Outputs (2016 2017 2018)
   No. 17	No. 1
   No. 18	No. 2
   No. 19	No. 3

   Is there continuity?

   YES 

   The AUX SIG GND, AUX LCH, and AUX RCH wires are OK. Go to step 7.

   NO 

   There is an open in the wire(s) between the audio-navigation unit and the auxiliary jack assembly. Replace the affected shielded harness.

7. Auxiliary jack assembly check (substitution)

   -1. Substitute a known-good auxiliary jack assembly. Refer to: Auxiliary Jack Assembly Removal And Installation

   - 2. Reconnect all the connectors, and recheck.

   Does the symptom go away?

   YES 

   Replace the original auxiliary jack assembly.

   NO 

   Replace the audio-navigation unit.Audio-Navigation Unit Removal and Installation (2016 2017 2018) .

8. Determine possible failure area (auxiliary jack assembly, others)

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

   - 2. Disconnect the auxiliary audio accessory from the auxiliary input jack.

   - 3. Disconnect the following connector.

   Auxiliary jack assembly 5P connector

   - 4. Connect terminals A and B with a jumper wire.

   Terminal A	Auxiliary jack assembly 5P connector No. 4 - Refer to:Auxiliary Jack Assembly Connector For Inputs And Outputs (2016 2017 2018) .
   Terminal B	Auxiliary jack assembly 5P connector No. 5 - Refer to:Auxiliary Jack Assembly Connector For Inputs And Outputs (2016 2017 2018) .

   - 5. Turn the vehicle to the ON mode.

   - 6. Turn on the audio system.

   Does the display change to the AUX mode?

   YES 

   Replace the auxiliary jack assembly. Refer to: Auxiliary Jack Assembly Removal and Installation .

   NO 

   Go to step 9.

9. Determine possible failure area (AUX DET line, others)

   -1. Remove the jumper wire.

   - 2. Measure the voltage between test points 1 and 2.

   Test condition	Vehicle ON mode
   	Auxiliary jack assembly 5P connector: disconnected
   Test point 1	Auxiliary jack assembly 5P connector No. 5 - Refer to: Auxiliary Jack Assembly Connector For Inputs And Outputs (2016 2017 2018)
   Test point 2	Body ground

   Is there about 3.0 V?

   YES 

   Go to step 11.

   NO 

   Go to step 10.

10. Open wire check (AUX DET line)

    -1. Measure the voltage between test points 1 and 2.

    Test condition	Vehicle ON mode
    	Auxiliary jack assembly 5P connector: disconnected
    Test point 1	Audio-navigation unit connector B (20P) No. 20 - Refer to: Audio-Navigation Unit Connector For Inputs And Outputs (2016) Audio-Navigation Unit Connector For Inputs And Outputs (2017 2018)
    Test point 2	Body ground

    Is there about 3.0 V?

    YES 

    Repair an open in the wire between the audio-navigation unit and the auxiliary jack assembly.

    NO 

    Replace the audio-navigation unit.Audio-Navigation Unit Removal and Installation (2016 2017 2018) .

11. Determine possible failure area (AUX DET GND/AUX GND line, others)

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

    - 2. Check for continuity between test points 1 and 2.

    Test condition	Vehicle OFF (LOCK) mode
    	Auxiliary jack assembly 5P connector: disconnected
    Test point 1	Auxiliary jack assembly 5P connector No. 4 - Refer to: Auxiliary Jack Assembly Connector For Inputs And Outputs (2016 2017 2018) .
    Test point 2	Body ground

    Is there continuity?

    YES 

    Replace the audio-navigation unit.Audio-Navigation Unit Removal and Installation (2016 2017 2018) .

    NO 

    Go to step 12.

12. Open wire check (AUX DET GND/AUX GND line)

    -1. Disconnect the following connector.

    Audio-navigation unit connector B (20P)

    - 2. Check for continuity between test points 1 and 2.

    Test condition	Vehicle OFF (LOCK) mode
    	Audio-navigation unit connector B (20P) disconnected
    	Auxiliary jack assembly 5P connector: disconnected
    Test point 1	Audio-navigation unit connector B (20P) No. 9 - Refer to: Audio-Navigation Unit Connector For Inputs And Outputs (2016) Audio-Navigation Unit Connector For Inputs And Outputs (2017 2018) .
    Test point 2	Auxiliary jack assembly 5P connector No. 4 - Refer to: Auxiliary Jack Assembly Connector For Inputs And Outputs (2016 2017 2018)

    Is there continuity?

    YES 

    Audio-Navigation Unit Removal and Installation (2016 2017 2018) .

    NO 

    Repair an open in the wire between the audio-navigation unit and the auxiliary jack assembly.