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: Always check the connectors for poor connections or loose terminals.

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

Does the audio unit display operate and sound properly?

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

NO - Go to step 2.

2. Turn the ignition switch OFF.
3. Check the No. 5 (7.5 A) fuse and the No. 32 (10 A) fuse in the driver's 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 (20P).
6. Turn the ignition switch ON (II).




7. Measure the voltage between the No. 2 and No. 10 terminals of audio unit connector A (20P) and body ground.

Is there battery voltage?

YES - Go to step 8.

NO - Repair any open in the wire(s) between the No. 5 (7.5 A) fuse and the No. 32 (10 A) fuse in the driver's under-dash fuse/relay box and the audio unit.

8. Reconnect audio unit connector A (20P).




9. Check for 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 an open in the wire between the audio unit connector A (20P) terminal No. 20 and body ground (G504).