Audio Remote Switch Does Not Work Properly

WARNING: This page is about a different car, the 2008 Honda Pilot, 2007 Honda Pilot, and 2006 Honda Pilot. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Check the vehicle battery condition first.

Test the radio remote switch (see ANTENNA AMPLIFIER REPLACEMENT ).
Is the radio remote switch OK?

YES - Go to step 2.

NO - Replace the remote switch (see AUDIO UNIT REMOVAL/INSTALLATION ).
Turn the ignition switch ON (II).
Turn on the audio unit and check the audio unit operation (volume up, volume down, CH, MODE).
Is the audio unit operation OK?

YES - Go to step 5.

NO - Replace the audio unit (see AUDIO UNIT REMOVAL/INSTALLATION ), and recheck.
Turn the ignition switch OFF.
Remove the audio unit (see AUDIO UNIT REMOVAL/INSTALLATION ).
NOTE: Eject all the disc before removing the audio unit to prevent damaging the CD player's load mechanism.

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

Fig 1: Measuring Resistance Between Audio Unit Connector A (20P) 3 & 11 Terminals

Courtesy of AMERICAN HONDA MOTOR CO., INC.

RADIO REMOTE SWITCH TABLE

Button held down	VOL DOWN	VOL UP	CH(-)	MODE	(NONE)
Resistance	about 50 ohms	about 300 ohms	about 900 ohms	about 2.4 K ohms	10 k ohms

Is resistance OK?

YES - Go to step 7.

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

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

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

Is there continuity?

YES - Repair the short to body ground in the circuit between the audio unit and the radio 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 ).