MAP Disc Read Error

WARNING: This page is about a different car, the 2006 Lexus GS 430 and 2006 Lexus GS 300. However, it is still accessible from the selected car via links, so may be relevant.

CHECK MAP DISC
1. Check for dirt on the map disc surface.
  OK : No dirt is on map disc surface.
  
  NOTE: Do not use a conventional record cleaner or antistatic preservative.
  
  HINT:
  
  If the disc is dirty, clean the disc by wiping the disc's surface radially with a soft cloth.
NG : CLEAN MAP DISC

Fig 1: Cleaning Disc
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK : GO TO NEXT STEP
CHECK MAP DISC
1. Check that the map disc is not deformed or cracked.
  OK : No deformations or cracks on map disc.
NG : REPLACE MAP DISC

Fig 2: Ensure Map Disc Is Not Cracked Or Deformed
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN DIAGNOSTIC TROUBLE CODE CHART