With Navigation
U12B1 POWER SUPPLY VOLTAGE
DTC Logic
DTC DETECTION LOGIC
Diagnosis Procedure
1. CHECK CHARGING SYSTEM
Check the vehicle charging system. Refer to "Work Flow (With EXP-800 NI or GR8-1200 NI)" With EXP-800 NI Or GR8-1200 NI or
"Work Flow (Without EXP-800 NI or GR8-1200 NI)" Without EXP-800 NI Or GR8-1200 NI.
Is the inspection result normal?
YES- Replace the AV control unit. Refer to "Removal and Installation" With Navigation.
NO- Repair or replace the malfunctioning components.