Power Switch Will Not Turn ON (Without Navigation)

Power Switch Will Not Turn ON (Without Navigation)

Special Tools Required
- Radio test harness breakout box 07AA2-SDAA100
- Test harness (Stanley) 070AZ-SDAA200

Power switch will not turn ON (without navigation)

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 the audio unit connector A10 terminal.

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 A2 terminal.




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

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-SDAA200) to the radio test harness breakout box (07AAZ-SDAA100).




10. Connect the test harness connectors to the printed circuit board connector on the audio unit.
11. Connect the Ohm meter to the breakout box (07AAZ-SDAA200) POW SW and GND terminals.
12. Push the POWER button and check for continuity between the POW SW and GND terminals.

Is there continuity?

YES - Replace the audio unit

NO - Replace the audio-HVAC display panel.