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 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. 22 (15 A) fuse and No. 9 (10 A) fuse in the under-dash fuse/relay box.

Are the fuses OK?

YES - Go to step 5.

NO - Replace the fuse, and recheck.

5. Remove the audio unit. Check that the audio unit connector is properly connected.

Is it connected properly?

YES - Go to step 6.

NO - Reconnect the connector, and recheck the function.

6. Disconnect the audio unit 20P connector.

NOTE: Eject the disc before removing the audio unit to prevent damaging the CD player's load mechanism.

7. Turn the ignition switch to ON (II).
8. Measure the voltage between the No. 2 and No. 10 terminals of the audio unit 20P connector and body ground.






Is there battery voltage?

YES - Go to step 9.

NO - Repair open in the wire(s) between the No. 22 (15 A) fuse and No. 9 (10 A) in the under-dash fuse/relay box and the audio unit.

9. Turn the ignition switch to LOCK (0).
10. Reconnect the audio unit 20P connector.
11. Turn the ignition switch to ON (II).
12. Measure the voltage between audio unit 20P connector No. 20 terminal and body ground while pressing and releasing the audio unit power switch several times.






Is there less than 0.1 V?

YES - Replace the audio unit.

NO - Repair open in the wire between the audio unit connector A (20P) No. 20 terminal and body ground (G502).