Audio Unit Power Switch Will Not Turn on (No Information Display and No Sound) (Without Navigation)

Audio unit power switch will not turn on (No information display and no sound) (without navigation)

NOTE:
- Check the vehicle battery condition first.
- Check the connectors for poor connections or loose terminals.

1. With the ignition switch in ON (II), push the power switch ON to see if audio unit turns ON.

Does the audio unit operate properly, and does the audio sound normal?

YES - Intermittent failure, the system is OK at this time.

NO - Go to step 2.

2. Turn the ignition switch to LOCK (0).
3. Check the No. 23 (10 A) fuse in the under-hood fuse/relay box and No. 35 (7.5 A) fuse in the under-dash fuse/relay box.

Are the fuses OK?

YES - Go to step 4.

NO - Replace the fuse, and recheck.

4. Remove the audio unit. Check that the audio unit is properly connected.

Is it connected properly?

YES - Go to step 5.

NO - Reconnect the connector, and recheck the function.

5. Disconnect audio unit connector A (17P).

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

6. Turn the ignition switch to ON (II).
7. Measure the voltage between body ground and audio unit connector A (17P) terminals No. 14 and No. 17 individually.






Is there battery voltage on the both terminals?

YES - Go to step 8.

NO - Repair open in the wire(s) between the No. 23 (10 A) fuse in the under-hood fuse/relay box and the No. 35 (7.5 A) fuse in the under-dash fuse/relay box and the audio unit.

8. Reconnect audio unit connector A (17P).
9. Measure the voltage between audio unit connector A (17P) No. 9 terminal 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 (17P) No. 9 terminal and body ground (G505).