Diagnosis Procedure
1.CHECK HARNESS CONTINUITY (OPEN CIRCUIT)

Main line between HVAC and A-bag circuitChecking lights
Anti-lock Braking System (ABS)
warning light
Brake warning light (parking brake)
Brake warning light
Charge warning light
Engine oil pressure warning light
Forward Emergency Braking (FEB) system warning
light (if so eq ...
System temporarily unavailable
When radar blockage is detected, the system will
be deactivated automatically. The "Side Radar
Obstruction" warning message will appear and
the BSW/RCTA indicator (white) will blink A in
the vehicle information display.
The system is not available until the conditions no
longer exist.
...
Hazard function
Symptom Table
HAZARD AND BUZZER REMINDER FUNCTION MALFUNCTION
NOTE:
Before performing the diagnosis in the following table, check
"Work flow". Refer to DLK-9, "Work Flow".
If the following symptoms are detected, check systems shown in
the "Diagnosis/service procedure" column ...