Audio System Symptom Troubleshooting - Auxiliary input sound is low or cannot be heard
Auxiliary input sound is low or cannot be heard
NOTE:
  • Check the connectors for poor connections or loose terminals.
  • Use auxiliary stereo cables with 3.5 mm ends only.
  • Auxiliary accessories may be played on the audio unit using the auxiliary input.
  1. Turn the ignition switch to ON (II).
  1. Turn on the audio unit and connect an auxiliary accessory to the auxiliary input jack.
  1. Check the volume operation.
Is the sound normal?
YES -
Operation is normal at this time.■
NO -
Go to Step 4 .
  1. Make sure the auxiliary accessory volume is set to high.
Is the volume set to high?
YES -
Go to Step 5 .
NO -
Raise the auxiliary accessory volume is set to high. Make sure the audio unit volume is turned down before retesting.■
  1. Substitute a known-good auxiliary audio accessory and/or auxiliary stereo cable and recheck.
Does the auxiliary audio accessory operate properly?
YES -
Original auxiliary audio accessory or auxiliary stereo cable is faulty.■
NO -
Go to Step 6 .
  1. Turn the ignition switch to LOCK (0).
  1. Remove the auxiliary jack assembly and check that the auxiliary jack assembly is properly connected.
Is the auxiliary jack assembly connected properly?
YES -
Go to Step 8 .
NO -
Reconnect the connector, and recheck the function.■
  1. Disconnect the auxiliary jack assembly 5P connector.
  1. Disconnect audio unit connector B (20P).
  1. Check for continuity between body ground and audio unit connector B (20P) according to the table.
    Audio unit connector
    Wire color
    B3
    WHT
    B5
    YEL
    B13
    BLK
    B14
    RED
    B15
    BLU

Is there continuity?
YES -
Short to body ground in the wire(s) between audio unit and auxiliary jack assembly. Replace the affected shielded harness.■
NO -
Go to Step 11 .
  1. Check for continuity between audio unit connector B (20P) according to the table.
    From terminal
    To terminals
    B4 (GRY)
    B3 (WHT), B13 (BLK), B14 (RED)

Is there continuity?
YES -
Short in the wire(s) between audio unit and auxiliary jack assembly. Replace the affected shielded harness.■
NO -
Go to Step 12 .
  1. Check for continuity between audio unit connector B (20P) and auxiliary jack assembly 5P connector according to the table.
    Audio unit connector
    Auxiliary jack assembly connector
    Wire color
    B3
    3
    WHT
    B5
    2
    YEL
    B13
    4
    BLK
    B14
    5
    RED
    B15
    1
    BLU

Is there continuity?
YES -
Substitute a known-good auxiliary jack assembly and recheck. If the symptom/indication goes away, replace the original auxiliary jack assembly. If the symptom/indication is still present, replace the audio unit. ■
NO -
Open in the wire(s) between the audio unit and auxiliary jack assembly. Replace the affected shielded harness.■