Audio remote switch does not work properly

WARNING: This page is about a different car, the 2008 Acura TL and 2007 Acura TL. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

Check the vehicle battery condition first.
Check the connectors for poor connections or loose terminals.

Test the audio remote switch (see AUDIO REMOTE SWITCH TEST ).
Is the audio remote switch OK ?

YES -Go to step 2.

NO -Replace the audio remote switch (see STEERING WHEEL DISASSEMBLY/REASSEMBLY ).
Remove the audio-HVAC display module assembly (see AUDIO-HVAC DISPLAY MODULE ASSEMBLY REMOVAL/INSTALLATION ).
NOTE: Eject all the discs before removing the audio unit to prevent damaging the CD/DVD player's load mechanism.

Measure the resistance between audio unit connector A (20P) terminals No. 3 and No. 11 as specified in the table.

Fig 1: Measuring Resistance Between Audio Unit Connector (20P) Terminals No. 3 And No. 11

Courtesy of AMERICAN HONDA MOTOR CO., INC.

AUDIO REMOTE SWITCH

AUDIO REMOTE SWITCH RESISTANCE SPECIFICATIONS

Button held down	VOL DOWN	VOL UP	CH (-)	CH (+)	MODE	(NONE)
Resistance	about 100 Ω	about 357 Ω	about 775 Ω	about 1.7 kΩ	about 3.7 kΩ	about 10 kΩ

Is the resistance OK?

YES -Go to step 4.

NO -Repair open or high resistance in the wire between the audio unit and the audio remote switch. If the wires are OK, replace the cable reel (see CABLE REEL REPLACEMENT ).

Check for continuity between body ground and audio unit connector A (20P) terminals No. 3 and No. 11 individually.

Fig 2: Checking Continuity Between Audio Unit Connector (20P) Terminals 3 And 11 And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES -Repair short to ground in the wire between the audio unit and the audio remote switch. If the wires are OK, replace the cable reel (see CABLE REEL REPLACEMENT ).

NO -Replace the audio unit (see AUDIO UNIT REMOVAL/INSTALLATION ).