Navigation System Symptom Troubleshooting - Navigation unit will not eject or accept the navigation DVD
  1. Measure the voltage between navigation unit connector A (8P) terminal No. 1 and No. 2 to body ground.
Is there battery voltage?
YES -
Replace the navigation unit. ■
NO -
Repair open in the WHT wire between navigation unit connector A (8P) terminal No. 1 and the No. 15 (10 A) fuse in the under-hood fuse/relay box or the navigation unit connector A (8P) terminal No. 2 and No. 18 (7.5 A) fuse in the driver's under-dash fuse/relay box.■