Audio System Symptom Troubleshooting - Audio remote switch does not work properly (audio panel buttons work)
Audio remote switch does not work properly (audio panel buttons work)
NOTE:
Check the vehicle battery condition first.
Check the connectors for poor connections or loose terminals.
1.
Problem verification:

Problem verification
?1.
Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.

?2.
Turn on the audio unit, and using the audio remote switch buttons, check if the audio system operates properly.

Is the audio system operation OK?

     
YES
     
     
     
Intermittent failure, the system is OK at this time.?
     
NO
     
     
     
The failure is duplicated, go to step 2.
2.
Determine possible failure area (audio remote switch, others):

Determine possible failure area (audio remote switch, others)
?1.
Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

?2.
Do the Audio Remote Switch Test.

Is the audio remote switch OK?

     
YES
     
     
     
Go to step 3.
     
NO
     
     
     
3.
Shorted wire check (AUDIO REMOTE SW line):

Shorted wire check (AUDIO REMOTE SW line)
?1.
Disconnect the following connector.
NOTE: Eject the disc before disconnecting the audio unit to prevent damaging the CD player's load mechanism.


?2.
Check for continuity between test points 1 and 2.
Test condition
IG LOCK (0) or OFF mode
 
Audio remote switch 12P connector: disconnected
 
Audio unit connector A (24P): disconnected
Test circuit
AUDIO REMOTE SW
Test point 1
Audio unit connector A (24P) No. 22 (PNK)
Test point 2
Body ground


Is there continuity?

     
YES
     
     
     
Repair a short to body ground in the wire between the audio unit and the audio remote switch. If the wire is OK, replace the cable reel.?
     
NO
     
     
     
The AUDIO REMOTE SW wire is not shorted to ground. Go to step 4.
4.
Open wire check (AUDIO REMOTE SW line, REMOTE SW GND line):

Open wire check (AUDIO REMOTE SW line, REMOTE SW GND line)
?1.
Reconnect the audio remote switch 12P connector, and measure the resistance between test points 1 and 2 as specified in the table.
Test condition
IG LOCK (0) or OFF mode
 
Audio unit connector A (24P): disconnected
Test circuit
AUDIO REMOTE SW, REMOTE SW GND
Test point 1
Audio unit connector A (24P) No. 22 (PNK)
Test point 2
Audio unit connector A (24P) No. 11 (BRN)

AUDIO REMOTE SWITCH TABLE
Button held down
VOL DOWN
VOL UP
CH (?)
CH (?)
SOURCE
(No button pressed)
Resistance
about 99 ?
about 357 ?
about 775 ?
about 1.7 k?
about 3.7 k?
about 10 k?


Is the resistance OK?

     
YES
     
     
     
     
NO
     
     
     
Repair an open in the wire(s) between the audio unit and the audio remote switch. If the wires are OK, replace the cable reel.?