Power Switch Will Not Turn ON (With Navigation)

Power Switch Will Not Turn ON (With Navigation)

Special Tools Required
- Radio test harness breakout box 07AAZ-SDAA100
- Test harness A&B (Alpine) 070AZ-SDAA100


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.

NO - Go to step 2.

2. Turn the ignition switch OFF, then check the No. 5 (10 A) 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. 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 A (20P) terminal No. 10 and body ground. There should be battery voltage.

Is there battery voltage?

YES - Go to step 5.

NO - Repair the open circuit or poor connection in the wire between the under-dash fuse/relay box No. 5 (10 A) fuse and audio unit connector A terminal No. 10.

5. Turn the ignition switch ON (II).




6. Measure the voltage between the audio unit connector A (20P) terminal No. 2 and body ground. There should be battery voltage.

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 No. 32 (7.5 A) fuse and audio unit connector A terminal No. 2.




7. With the ignition switch ON, check for voltage between audio unit connector A terminal No. 20 and body ground. There should be less than 0.1 V.

Is there less than 0.1 V?

YES - Go to step 8.

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

8. Remove the audio unit.
9. Connect the test harness (070AZ-SDAA100) to the radio test harness breakout box (07AAZ-SDAA100).




10. Connect the test harness connector to the printed circuit board connector on the audio unit.
11. Connect the Ohm meter to the breakout box (07AAZ-SDAA100 adapter) POWER and GND terminals.
12. Push the POWER button and check for continuity between the POWER and GND terminals.

Is there continuity?

YES - Replace the audio unit.

NO - Replace the audio-HVAC display panel.