Audio System Symptom Troubleshooting - USB device does not function
USB device does not function
NOTE:
  • Some models may not support USB device such as portable digital players.
  • The USB memory used for inspection should conform to the ‘‘USB mass storage class'' standard.
  • Not compatible with USB memory of 128 MB or below.
  • The file format for the music data to be saved to the USB memory for inspection are WMA (Windows Media Audio) and MP3. (Not compatible with MP3 files saved in variable bit rate.)
  • Be sure that the USB device used for inspection functions properly.
  1. Turn the ignition switch to ON (II).
  1. Operate the AUX button, and check if it changes to USB mode.
Does it change to USB mode?
YES -
Go to Step 3 .
NO -
Go to Step 14 .
  1. Connect a properly functioning USB device for inspection.
  1. Check that the USB memory for inspection functions properly.
Is the system normal?
YES -
Check that there is no dirt or damage in the USB terminal. If there is no abnormality, USB device is either defective or incompatible.■
NO -
Go to Step 5 .
  1. Check if ‘‘NO DATA'' appears when USB device is connected.
Does ‘‘NO DATA'' appear?
YES -
Go to Step 6 .
NO -
Go to Step 9 .
  1. Check the connectors at the USB adapter unit B connector (5P) and USB adapter cable and USB jack.
Are the connectors and terminals connected properly?
YES -
Go to Step 7 .
NO -
Repair the connection and recheck.■
  1. Disconnect USB adapter unit connector B (5P).
  1. Check for continuity between USB adapter unit connector B (5P), and USB jack according to the table.
    USB adapter unit connector
    USB jack
    USB VBUS
    B1
    No. 1
    USB DATA−
    B2
    No. 2
    USB DATA+
    B3
    No. 3
    USB GND
    B4
    No. 4
    USB SH
    B5
    No. 5

Is there continuity?
YES -
NO -
Repair open in the wires between the USB adapter unit and USB jack.■
  1. Check if sound normally comes out from the speakers while selecting radio, CD, etc.
Is the sound normal?
YES -
Go to Step 10 .
NO -
Go to No Sound is heard from the speaker(s):■
  1. Check if sound is normal when changed to TV.
Is the sound normal?
YES -
Go to Step 11 .
NO -
Go to Step 28 .
  1. Turn the ignition switch to ON (II).
  1. Disconnect USB adapter unit connector A (14P) and the audio unit connector D (14P).
  1. Check for continuity between USB adapter unit connector A (14P), audio unit connector D (14P) according to the table.
    USB adapter unit connector
    Audio unit connector
    Wire color
    AUDIO R+
    A5
    D5
    GRN
    AUDIO R−
    A13
    D13
    WHT
    AUDIO L+
    A6
    D6
    BLK
    AUDIO L−
    A14
    D14
    RED

Is there continuity?
YES -
NO -
Repair open in the wire(s) between the USB adapter connector and audio unit connector.■
  1. Turn the ignition switch to LOCK (0).
  1. Disconnect USB adapter unit connector A (14P).
  1. Turn the ignition switch to ON (II).
  1. Measure the voltage between the USB adapter unit connector A (14P) terminals No. 1 and No. 11.
Is there battery voltage?
YES -
Go to Step 18 .
NO -
Go to Step 24 .
  1. Turn the ignition switch to LOCK (0).
  1. Disconnect USB adapter unit connector A (14P) and the audio unit connector D (14P).
  1. Check for continuity between USB adapter unit connector A (14P) and the audio unit connector D (14P) according to the table.
    USB adapter unit connector
    Audio unit connector
    Wire color
    GA-NET BUS+
    A9
    D9
    RED
    GA-NET BUS−
    A10
    D10
    GRN
    SYS ON
    A2
    D2
    LT BLU

Is there continuity?
YES -
Go to Step 21 .
NO -
Open or short in the wire(s) between the USB adapter unit and the audio unit; replace the affected shielded harness.■
  1. Check for continuity between the body ground and USB adapter unit connector A terminals No. 2, No. 9 and No. 10 terminal of the USB adapter connector A (14P) individually.
Is there continuity?
YES -
Repair short in the wire(s) between the USB adapter connector A (14P) and body ground.■
NO -
Go to Step 22 .
  1. Check for continuity between the terminals of audio unit connector D (14P) according to the table.
    From terminal
    To terminals
    D3 (GRY)
    D9 (RED), D10 (GRN)

Is there continuity?
YES -
Repair short in the wire(s) betweens audio unit connector D (14P). Replace the appropriate; shield harness.■
NO -
Go to Step 23 .
  1. Check is sound normally comes out from the speakers while selecting radio, CD, TV etc.
Is the sound normal?
YES -
NO -
Replace the Audio unit:■
  1. Turn the ignition switch to LOCK (0).
  1. Disconnect USB adapter unit connector A (14P) and the audio unit connector D (14P).
  1. Check for continuity between USB adapter unit connector A (14P), and the audio unit connector D (14P) according to the table.
    USB adapter unit connector
    Audio unit connector
    +B
    A1 (WHT)
    D1 (WHT)
    GND
    A11 (BLK)
    D11 (BLK)

Is there continuity?
YES -
Go to Step 27 .
NO -
Repair open in the wire(s) between the USB adapter unit connector A (14P) terminal No. 1, No. 11 and audio unit connector D (14P) terminal No. 1, No. 11.■
  1. Check for continuity between body ground and USB adapter unit connector A (14P) according to the table.
    USB adapter unit connector
    Wire color
    +B
    A1
    WHT
    GND
    A11
    BLK

Is there continuity?
YES -
Repair short in the wire between body ground and the USB adapter unit connector terminal No. 1, No. 11.■
NO -
Check the connection of the connector. If there is no abnormality, replace the audio unit with navigation system , without navigation system. ■
  1. Turn the ignition switch to LOCK (0).
  1. Disconnect USB adapter unit connector A (14P) and the audio unit connector D (14P).
  1. Check for continuity between USB adapter unit connector A (14P) and the audio unit connector D (14P) according to the table.
    USB adapter unit connector
    Audio unit connector
    Wire color
    AUDIO L+
    A6
    D6
    BLK
    AUDIO L−
    A14
    D14
    RED
    AUDIO R+
    A5
    D5
    GRN
    AUDIO R−
    A13
    D13
    WHT

Is there continuity?
YES -
Go to Step 31 .
NO -
Repair open in the wire between the USB adapter unit connector A (14P) and audio unit connector D (14P).■
  1. Check for continuity between body ground and USB adapter unit connector A (14P) according to the table.
    USB adapter unit connector
    Wire color
    AUDIO L+
    A6
    BLK
    AUDIO L−
    A14
    RED
    AUDIO R+
    A5
    GRN
    AUDIO R−
    A13
    WHT

Is there continuity?
YES -
Repair short in the wire between body ground and the USB adapter unit connector terminal No. 5, No. 6, No. 13 and No. 14.■
NO -
Go to Step 32 .
  1. Check for continuity between USB adapter unit connector A (14P) terminal No. 4 and No. 5, No. 6, No. 13, No. 14 according to the table.
    From terminal
    To terminals
    No. 4 (GRY)
    No. 5 (GRN), No. 6 (BLK), No. 13 (WHT), No. 14 (RED)

Is there continuity?
YES -
Repair short in the wire(s) betweens USB adapter connector A (14P). Replace the appropriate shield harness.■
NO -