Power Switch Will Not Turn ON (No Information Display and No Sound)

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.

1. Turn the ignition switch to ON (II).
2. Push the power switch ON to see if the audio unit turns ON.

Does the power turn on?

YES - Operation is normal. If the display turns ON, but no sound is heard or if the display does not turn ON, but the sound is OK. Go to audio system sound is weak or distorted, or no sound is heard from speakers.

NO - Go to step 3.

3. Turn the ignition switch to LOCK (0).
4. Check the No. 5 (20 A) and No. 32 (7.5 A) fuses in the under-dash fuse/relay box.

Are the fuses OK?

YES - Go to step 5.

NO - Replace the fuse(s) and recheck.

5. Remove the audio-HVAC display module assembly, and check that audio unit connector A (20P) is properly connected.

NOTE: Eject all the discs before removing the audio unit to prevent damaging the CD/DVD player's load mechanism.

Is it connected properly?

YES - Go to step 6.

NO - Reconnect the connector, and recheck the function.

6. Measure the voltage between audio unit connector A (20P) terminal No. 10 and body ground.






Is there battery voltage?

YES - Go to step 7.

NO - Repair open or poor connection in the wire between the under-dash fuse/relay box and audio unit connector A (20P) terminal No. 10.

7. Turn the ignition switch to ON (II).
8. Measure the voltage between audio unit connector A (20P) terminal No. 2 and body ground.






Is there battery voltage?

YES - Go to step 9.

NO - Repair open circuit or poor connection in the wire between the under-dash fuse/relay box and audio unit connector A (20P) terminal No. 2.

9. Measure the voltage between audio unit connector A (20P) terminal No. 20 and body ground.






Is there less than 0.1 V?

YES - Replace the audio unit.

NO - Repair open in the wire between audio unit connector A (20P) terminal No. 20 and body ground (G504).