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

Power switch will not turn ON (No information display and no sound)

1. With the ignition switch ON (II), 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 display is OK, go to the symptom troubleshooting index.

NO - Go to step 2.

2. Turn the ignition switch OFF, then check the No. 5 (20A) and No. 32 (7.5 A) fuses in the under-dash fuse/relay box.

Are the fuses OK?

YES - Go to step 3.

NO - Replace the fuse(s) and recheck.

3. Remove the audio-HVAC display module assembly. Check that audio unit connector A (20P) is properly connected.

Is it connected properly?

YES - Go to step 4.

NO - Reconnect the connector, and recheck the function.




4. Measure voltage between audio unit connector A10 terminal and body ground.

Is there battery voltage?

YES - Go to step 5.

NO - Repair the open circuit or poor connection in wire between the under-dash fuse/relay box and audio unit connector A10 terminal.

5. Turn the ignition switch ON(II).




6. Measure voltage between the audio unit connector A2 terminal and body ground.

Is there battery voltage?

YES - Go to step 7.

NO - Repair the open circuit or poor connection in the wire between the under-dash fuse/relay box and audio unit connector A2 terminal.




7. Turn the ignition switch OFF, then check for continuity between audio unit connector A20 terminal and body ground.

Is there continuity?

YES - Replace the audio unit.

NO - Repair an open in the wire between audio unit connector A20 terminal and body ground (G504).