Volume Does Not Change
Volume does not changeSpecial Tools Required
- Radio test harness breakout box 07AAZ-SDAA100
- Radio test harness 070AZ-SEAA200
1. Set the fader and balance position to the center.
2. Operate the volume knob to see if the volume changes accordingly.
Does it change?
YES - Operation is normal.
NO - Go to step 3.
3. Operate the volume knob to see if the LCD display changes accordingly.
Does it change?
YES - Replace the audio unit.
NO - Go to step 4.
4. Remove the audio unit.
5. Connect the test harness (070AZ-SEAA200A with navigation or 070AZ-SEAA200B without navigation) to radio test harness breakout box (07AAZ-SDAA100).
6. Connect the test harness (070AZ-SEAA200A with navigation or 070AZ-SEAA200B without navigation) to the printed circuit board.
7. Connect the ohmmeter to the special tool (07AAZ-SDAA100) GND terminal one lead and VOL-A and VOL-B terminals with the other.
8. Turn the volume knob clockwise one click at a time. The resistance should change as follows with each turn of the knob:
100 Ohm --> infinity --> 100 Ohm --> infinity --> 100 Ohm
Does the resistance change as indicated?
YES - Replace the audio unit.
NO - Replace the audio-HVAC display panel.