Diagnosis Procedure
1.CHECK HARNESS CONTINUITY (OPEN CIRCUIT)

Main line between HVAC and A-bag circuitBrake booster
Exploded View
Master cylinder assembly
Brake booster
Brake pedal
Lock nut
Gasket
Removal and installation
NOTE:
When removing components such as hoses, tubes/lines, etc., cap or plug openings
to prevent fluid from spilling.
REMOVAL
Release the fuel pressure. Refer to ...
Preparation
PREPARATION
Special Service Tool
The actual shape of the tools may differ from those illustrated here.
Commercial Service Tools
...
U1300 AV comm circuit
Description
U1300 is indicated when malfunction occurs in communication signal of multi
AV system. Indicated simultaneously,
without fail, with the malfunction of control units connected to AV control unit
with communication line.
Determine the possible malfunction cause from the table bel ...