2019 Infiniti M35 V6-3.5L (VQ35HR) Diagnostic and Repair Information Page 833
Diagnosis Procedure
1.CHECK AV CONTROL UNIT POWER SUPPLY AND GROUND CIRCUIT
Check AV control unit power supply and ground circuit. See: Accessories and Optional Equipment/Radio, Stereo, and Compact Disc/Testing and
Inspection/Component Tests and General Diagnostics/Power Supply and Ground Circuit/AV Control Unit/With Mobile Entertainment System.
Is the inspection result normal?
YES - INSPECTION END
NO - Repair or replace malfunctioning parts.
Without Mobile Entertainment System
U121F AV CONTROL UNIT
Description
Replace the AV control unit if this DTC is displayed. See: Accessories and Optional Equipment/Radio, Stereo, and Compact
Disc/Radio/Stereo/Service and Repair/AV Control Unit/Exploded View/Without Mobile Entertainment System.
DTC Logic
Diagnosis Procedure
1.CHECK AV CONTROL UNIT POWER SUPPLY AND GROUND CIRCUIT
Check AV control unit power supply and ground circuit. See: Accessories and Optional Equipment/Radio, Stereo, and Compact Disc/Testing and
Inspection/Component Tests and General Diagnostics/Power Supply and Ground Circuit/AV Control Unit/Without Mobile Entertainment System.
Is the inspection result normal?
YES - INSPECTION END
NO - Repair or replace malfunctioning parts.
Without Mobile Entertainment System
U1220 AV CONTROL UNIT
Description
Replace the AV control unit if this DTC is displayed. See: Accessories and Optional Equipment/Radio, Stereo, and Compact
Disc/Radio/Stereo/Service and Repair/AV Control Unit/Exploded View/Without Mobile Entertainment System.
