Auxiliary Systems; Automatic Hot Air Intake (Hal) System - Toyota 4-Runner 1985 Repair Manual

EMISSION CONTROL SYSTEMS (CARB.) - Auxiliary Systems EC-53
COOL
To Intake
Manifold
Air Control
Valve
AUXILIARY SYSTEMS
1. Automatic Hot Air Intake (HAl)
System
Thermo Valve
HOT
Thermo Valve
EC0385
A03071
EC1061
COOL
AIR
EC0386
This system leads a hot air supply to the carburetor in cold weather to improve driveability and to prevent the carburetor
from icing in extremely cold weather.
Temperature in Air Cleaner
Thermo Valve
Air Control Valve
Intake Air
Cool
CLOSED
Hot air passage
HOT
Below 30°C (86°F)
OPEN
Hot
OPEN
Cool air passage
COOL
Above 45°C (113°F)
OPEN