Audio Remote Switch Does Not Work Properly (With Navigation)
- Check the vehicle battery condition first (see BATTERY TEST ).
- Check the connectors for poor connections or loose terminals.
- Check the audio-navigation unit operation.
Is the audio-navigation unit operation OK?
YES - Go to step 2.
NO - Replace the audio-navigation unit (see AUDIO-NAVIGATION UNIT REMOVAL/INSTALLATION ).
- Do AUDIO REMOTE SWITCH TEST/REPLACEMENT
).
Is the audio remote switch OK?
YES - Go to step 3.
NO - Replace the audio remote-navigation voice control switch.
- Replace the audio-navigation unit (see AUDIO-NAVIGATION UNIT REMOVAL/INSTALLATION )
- Measure the resistance between audio unit connector A (20P) No. 3 and No. 14 terminals as specified in the table below.AUDIO REMOTE SWITCH TABLE
Button held down VOL DOWN VOL UP CH MODE No button pressed Resistance about 50 Ω about 300 Ω about 900 Ω about 2.4 KΩ about 10 kΩ Is the resistance OK?
YES - Go to step 5.
NO - Repair open 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 ).
- 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 short to body ground in the circuit between audio 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 ).