Audio System Symptom Troubleshooting - Auxiliary input sound is low or cannot be heard
  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.■