Audio System - Audio power switch will not turn on (No information display and no sound) (Without Touch Screen) (2019 2020 2021 2022)
Audio power switch will not turn on (No information display and no sound)
NOTE:
- Check the vehicle battery condition first .
- Check the connectors for poor connections or loose terminals.
- Problem verification
-1. Turn the vehicle to the ON mode.
-2. Press the VOLUME/POWER knob on to see if the audio unit turns on.
Does the audio system operate properly, and does the audio sound normal?
YES
Intermittent failure, the system is OK at this time.
NO
The failure is duplicated, go to step 2.
- Fuse check
-1. Turn the vehicle to the OFF (LOCK) mode.
-2. Check the following fuses.
Fuse No. A29 Fuse No. B19 Are the fuses OK?
YES
Go to step 3.
NO
Replace the fuse(s), and recheck. If the fuse(s) blows again, check for a short in the No. A29 fuse (also check the GA+B line) and/or the No. B19 fuse circuits.
- Open wire check (+B BACK UP line)
-1. Disconnect the following connector.
NOTE: Eject the disc before disconnecting the audio unit to prevent damaging the CD player's load mechanism.
Audio unit connector A (24P) -2. Measure the voltage between test points 1 and 2.
Test condition Vehicle OFF (LOCK) mode Audio unit connector A (24P): disconnected Test circuit +B BACK UP Test point 1 Audio unit connector A (24P) No. 3 (GRN) Test point 2 Body ground Is there battery voltage?
YES
The +B BACK UP wire is OK. Go to step 4.
NO
Repair an open in the wire.
- Open wire check (ACC/RR CAMERA ACC DIODE line)
-1. Turn the vehicle to the ON mode.
-2. Measure the voltage between test points 1 and 2.
Test condition Vehicle ON mode Audio unit connector A (24P): disconnected Test circuit ACC/RR CAMERA ACC DIODE Test point 1 Audio unit connector A (24P) No. 24 (YEL) Test point 2 Body ground Is there battery voltage?
YES
The ACC/RR CAMERA ACC DIODE wire is OK. Go to step 5.
NO
Repair an open in the wire.
- Open wire check (GND line)
-1. Turn the vehicle to the OFF (LOCK) mode.
-2. Check for continuity between test points 1 and 2.
Test condition Vehicle OFF (LOCK) mode Audio unit connector A (24P): disconnected Test circuit GND Test point 1 Audio unit connector A (24P) No. 1 (BLK) Test point 2 Body ground Is there continuity?
YES
The GND wire is OK. Go to step 6.
NO
Repair an open in the wire or poor ground (G504).
- Audio switch panel check
-1. Substitute a known-good audio switch panel .
-2. Reconnect all the connectors, and recheck.
Does the symptom go away?
YES
Replace the original audio switch panel.
NO