Audio Remote Switch Does Not Work Properly

WARNING: This page is about a different car, the 2011 Honda Pilot, 2010 Honda Pilot, and 2009 Honda Pilot. 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.

Turn the ignition switch to ON (II).
Turn on the audio unit and check the audio unit operation (volume up, volume down, CH (UP), CH (DOWN), MODE) using the audio remote switch.
Is the audio unit operation OK?

YES - Operation is normal. ■

NO - Go to step 3.
Test the audio remote switch (see STEERING WHEEL DISASSEMBLY/REASSEMBLY ).
Is the audio remote switch OK?

YES - Go to step 4.

NO - Replace the audio remote switch (see STEERING WHEEL DISASSEMBLY/REASSEMBLY ). ■
Turn the ignition switch to LOCK (0).
Remove the audio unit (see AUDIO UNIT REMOVAL/INSTALLATION ).
Disconnect audio unit connector A (24P).
NOTE: Eject all the discs before removing the audio unit to prevent damaging the CD/DVD player's load mechanism.

Reconnect the audio remote switch, and measure the resistance between audio unit connector A (24P) terminals No. 5 and No. 16 as specified in the table below.

AUDIO REMOTE SWITCH TABLE

AUDIO REMOTE SWITCH REFERENCE TABLE

Button held down	VOL DOWN	VOL UP	CH (-)	CH (+)	MODE	(No button pressed)
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 8.

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

Fig 1: Measuring Resistance Between Audio Unit Connector A (24P) Terminals No. 5 & No. 16

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Check for continuity between body ground and audio unit connector A (24P) terminals No. 5 and No. 16 individually.
Is there continuity?

YES - Go to step 9.

NO - Substitute a known-good audio unit (see AUDIO UNIT REMOVAL/INSTALLATION ), and recheck. If the symptom/indication goes away, replace the original audio unit. ■

Fig 2: Checking Continuity Between Body Ground & Audio Unit Connector A (24P) Terminals 5 & 16
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Disconnect the cable reel.
Check for continuity between body ground and audio unit connector A (24P) terminals No. 5 and No. 16 individually.
Is there continuity?

YES - Repair short to body ground in the wire(s) between the audio unit and the cable reel. ■

NO - Replace the cable reel (see CABLE REEL REPLACEMENT ). ■

Fig 3: Checking Continuity Between Body Ground & Audio Unit Connector A (24P) Terminals 5 & 16
Courtesy of AMERICAN HONDA MOTOR CO., INC.