G37x Coupe AWD V6-3.7L (VQ37VHR) (2009)
Diagnosis Procedure
1.CHECK MULTIFUNCTION SWITCH (REAR WINDOW DEFOGGER SWITCH)
Check rear window defogger operate.
YES - Replace multifunction switch (rear window defogger switch). Refer to See: Accessories and Optional Equipment/Radio, Stereo, and Compact
Disc/Service and Repair/Base Audio Without Navigation/Multifunction Switch/Removal And Installation
NO - Check rear window defogger system. Refer to See: Initial Inspection and Diagnostic Overview/Work Flow