Honda ACCORD HYBRID 2005 Service Manual page 2004

Audio System
S y m p t o m T r o u b l e s h o o t i n g ( c o n t ' d )
Special Tools Required
• Radio test harness breakout box 07AAZ-SDAA100
• Test harness A & B (Alpine) 070AZ-SDAA100
Volume does not change (with navigation)
1. Set the fader and balance position to the center.
2. Operate the v o l u m e knob to see if the v o l u m e
changes accordingly.
Does it change?
YES—Operation is n o r m a l . *
N O — G o t o step 3.
3. Operate the v o l u m e knob to see if the LCD display
changes accordingly.
Does it change?
YES—Replace the audio unit (see page 2 3 - 7 1 ) . •
N O — G o t o step 4.
4. Remove the audio unit (see page 23-71).
5. Connect test harness (070AZ-SDAA100) test
harness A to radio test harness breakout box
(07 AAZ-SDAA100).
6. Connect the test harness (070AZ-SDAA100) PTN-1
(A) connector to the printed circuit board connector.
7. Connect the o h m meter to the breakout box
(07AAZ-SDAA100) GND t e r m i n a l and V O L +
t e r m i n a l .
8. Turn the v o l u m e knob clockwise one click at a t i m e .
The resistance should change as f o l l o w s w i t h each
turn of the knob:
1.0 Q infinity 1.0 Q — infinity 1.0 &
Does the resistance change as indicated?
Y E S — G o t o step 9.
NO—Replace the audio-HVAC display panel
(see page 23-71 ) . •
23-38