Audio System Symptom Troubleshooting - USB device does not function (without navigation)
USB device does not function (without navigation)
NOTE:
  • Check the connectors for poor connections or loose terminals.
  • Make sure you have the client's USB device to use for testing.
  • Some music players (connected through the USB port) may not work with all models.
  • Make sure that the music player connected to the USB port works properly.
  • The USB memory used for testing should conform to the ‘‘USB mass storage class'' standard.
  • The USB function is not compatible with a USB memory of 128 MB or below.
  • The music must be saved to the player as WMA (Windows Media Audio) files or MP3.
  1. Connect a known-good music player to the USB port.
  1. Turn the ignition switch to ON (II).
  1. Press the AUX button, and check if it changes to USB mode.
Does it change to the USB mode?
YES -
Go to Step 4 .
NO -
Go to Step 13 .
  1. Check that the client's USB memory device for inspection functions properly. When connected to a known-good vehicle.
Is the system normal?
YES -
Go to Step 5 .
NO -
Check that there is no dirt or damage in the USB port. If the USB port is OK, the music player is either defective or incompatible.■
  1. Check if NO DATA appears when the music player is connected to the USB port.
Does NO DATA appear?
YES -
Go to Step 6 .
NO -
Go to Step 9 .
  1. Check the connectors at USB adapter unit connector B (5P) and the USB adapter cable and the 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 the 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 the USB jack.■
  1. Turn on the audio unit, and check for sound in each mode (AM, FM, and CD).
Is the sound normal?
YES -
Go to Step 10 .
NO -
  1. Turn the ignition switch to ON (II).
  1. Disconnect USB adapter unit connector A (14P) and audio unit connector C (14P).
  1. Check for continuity between USB adapter unit connector A (14P) and audio unit connector C (14P) according to the table.
    USB adapter unit connector
    Audio unit connector
    Wire color
    AUDIO R+
    A5
    C5
    ORN
    AUDIO R−
    A13
    C13
    YEL
    AUDIO L+
    A6
    C6
    BLU
    AUDIO L−
    A14
    C14
    PUR

Is there continuity?
YES -
NO -
Repair open in the wire(s) between the USB adapter connector and the 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 USB adapter unit connector A (14P) terminals No. 1 and No. 11.
Is there battery voltage?
YES -
Go to Step 17 .
NO -
Go to Step 23 .
  1. Turn the ignition switch to LOCK (0).
  1. Disconnect USB adapter unit connector A (14P) and audio unit connector C (14P).
  1. Check for continuity between USB adapter unit connector A (14P) and the audio unit connector C (14P) according to the table.
    USB adapter unit connector
    Audio unit connector
    Wire color
    GA-NET BUS+
    A9
    C9
    BLU
    GA-NET BUS−
    A10
    C10
    PNK

Is there continuity?
YES -
Go to Step 20 .
NO -
There is an 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 body ground and USB adapter unit connector A (14P) terminals No. 9 and No. 10 individually.
Is there continuity?
YES -
Repair short in the wire(s) between USB adapter connector A (14P) and body ground.■
NO -
Go to Step 21 .
  1. Check for continuity between terminals of USB adapter unit connector A (14P) according to the table.
    From terminal
    To terminals
    A3 (BRN)
    A9 (BLU), A10 (PNK)

Is there continuity?
YES -
Short in the wire(s) between the USB adapter unit and the audio unit. Replace the affected shielded harness.■
NO -
Go to Step 22 .
  1. Turn on the audio unit, and check for sound in each mode (AM, FM, and CD).
Is the sound normal?
YES -
NO -
  1. Turn the ignition switch to LOCK (0).
  1. Disconnect USB adapter unit connector A (14P) and the audio unit connector C (14P).
  1. Check for continuity between USB adapter unit connector A (14P) and audio unit connector C (14P) according to the table.
    USB adapter unit connector
    Audio unit connector
    Wire color
    +B
    A1
    C1
    WHT
    SYS ON
    A2
    C2
    LT BLU
    GND
    A11
    C11
    BLK

Is there continuity?
YES -
Go to Step 26 .
NO -
Repair open in the wire(s) between the USB adapter unit and the audio unit.■
  1. Reconnect audio unit connector C (14P).
  1. Turn the ignition switch to ON (II).
  1. Measure the voltage between USB adapter unit connector A (14P) terminals No. 1 and No. 2 and body ground individually.
Is there battery voltage?
YES -
Go to Step 29 .
NO -
There is an open in the wire(s) between the USB adapter unit and the audio unit.■
  1. Turn the ignition switch to LOCK (0).
  1. Reconnect USB adapter unit connector A (14P).
  1. Turn the ignition switch to ON (II).
  1. Measure the voltage between USB adapter unit connector A (14P) terminal No. 11 and body ground.
Is there less than 0.1 V?
YES -
NO -
Repair open in the wire between the USB adapter unit and the audio unit.■