Audio Remote Switch Does Not Work Properly (With Navigation)

WARNING: This page is about a different car, the 2011 Honda Fit, 2010 Honda Fit, and 2009 Honda Fit. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

Check the vehicle battery condition first, (see BATTERY TEST )
Check the connectors for poor connections or loose terminals.
Audio button operation can be checked by doing the hard key status test in the audio-navigation unit check screen. See navigation system diagnostic mode (see START-UP PROCEDURE AND DIAGNOSTIC MENU ).

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.
Turn the ignition switch to ON (II).
Turn on the audio-navigation unit, and check operation (volume up, volume down, CH (+), CH (-), MODE).
Is the navigation unit operation OK?

YES - Go to step 4.

NO - Replace the audio-navigation unit (see AUDIO UNIT CONNECTOR A (24P) ).
Disconnect the audio-navigation unit connector A (24P).

Measure the resistance between audio-navigation unit connector A (24P) terminals No. 5 and No. 16 as specified in the table.

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

Courtesy of AMERICAN HONDA MOTOR CO., INC.

RESISTANCE REFERENCE CHARTRESISTANCE REFERENCE CHARTRESISTANCE REFERENCE CHART

AUDIO REMOTE SWITCH 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 6.

NO - There is an open or high resistance in the circuit between the audio-navigation 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-navigation unit connector A (24P) terminals No. 5 and No. 16 individually.

Fig 2: Checking Continuity Between Body Ground And Audio-Navigation Unit Connector A (24P) Terminals No. 5 And No. 16
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES - There is a short to body ground in the circuit between the audio-navigation unit and the audio remote switch. If the wires are OK, replace the cable reel (see CABLE REEL REPLACEMENT ).

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