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Audio remote switch does not work properly (with navigation) Acura MDX II facelift

Audio System 3 illustrations ~412 words

Audio remote switch does not work properly (with navigation)

Note. Check the vehicle battery condition first (see BATTERY TEST ). Check the connectors for poor connections or loose terminals. Before troubleshooting, make sure you have anti-theft codes for the audio-navigation unit. After troubleshooting, enter the anti-theft codes for the audio-navigation unit.

Scheme 146

Scheme 146: Audio remote switch does not work properly (with navigation)
Scheme 146: Audio remote switch does not work properly (with navigation)

Scheme 147

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Scheme 147

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Scheme 148
Scheme 148
  1. Turn the ignition switch to ON (II).
  2. Turn on the audio-navigation unit and check the audio remote switch operation (volume up, volume down, CH (UP), CH (DOWN), MODE). Is the audio-navigation unit operation OK? YES -Operation is normal. NO -Go to step 3.
  3. Test the audio remote switch (see «AUDIO REMOTE SWITCH TEST»(ref-510484-S03988465742012102300000) ). Is the audio remote switch OK? YES -Go to step 4. NO -Replace the audio remote switch (see «AUDIO REMOTE SWITCH TEST»(ref-510484-S03988465742012102300000) ).
  4. Turn the ignition switch to LOCK (0).
  5. Remove the audio-navigation unit (see «AUDIO-NAVIGATION UNIT REMOVAL/INSTALLATION»(ref-510512-S04174865142012102300000) ), and disconnect audio-navigation unit connector A (24P). NOTE: Eject all the discs before removing the audio-navigation unit to prevent damaging the CD/DVD player's load mechanism.
  6. Reconnect the audio remote switch, and measure the resistance between audio-navigation unit connector A (24P) terminals No. 5 and No. 16 as specified in the table. AUDIO REMOTE SWITCH TABLE Button held down VOL DOWN VOL UP CH (-) CH (+) MODE (No button pressed) Resistance about 100 ohms about 357 ohms about 775 ohms about 1.7 kohms about 3.7 kohms about 10 kohms Is the resistance OK? YES -Substitute a known-good audio-navigation unit (see «AUDIO-NAVIGATION UNIT REMOVAL/INSTALLATION»(ref-510512-S04174865142012102300000) ), and recheck. If the symptom/indication goes away, replace the original audio-navigation unit (see «AUDIO-NAVIGATION UNIT REMOVAL/INSTALLATION»(ref-510512-S04174865142012102300000) ). NO -Go to step 7.
  7. Disconnect the cable reel subharness 20P connector from the cable reel.
  8. Check for continuity between body ground and audio-navigation 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-navigation unit (see «AUDIO-NAVIGATION UNIT REMOVAL/INSTALLATION»(ref-510512-S04174865142012102300000) ), and recheck. If the symptom/indication goes away, replace the original audio-navigation unit (see «AUDIO-NAVIGATION UNIT REMOVAL/INSTALLATION»(ref-510512-S04174865142012102300000) ).
  9. Disconnect the dashboard wire harness 20P connector from the cable reel.
  10. Check for continuity between body ground and audio-navigation unit connector A (24P) terminals No. 5 and No. 16 individually. Is there continuity? YES -Repair a short to body ground in the wire(s) between the audio-navigation unit and the cable reel. NO -Replace the cable reel (see «CABLE REEL REPLACEMENT»(ref-510461-S23303786522012102300000) ).