Choke Opener System - Toyota 4-Runner 1985 Repair Manual

EC-58
EMISSION CONTROL SYSTEMS (CARB.) - Auxiliary Systems
4. Choke Opener System
BVSV
A03076
ChokeOpener--------~~7*~~~
Diaphragm
BVSV
(Closed)
.F.:::::!==-~:-fJ>O;o4~~
Choke Opener
Diaphragm
Fed. and Canada
EC0392
Calif.
Choke Opener
Diaphragm
EC1063
EC0393
After warm-up, this system forcibly holds the choke valve open to prevent an over-rich mixture and release the fast idle
cam to the 4th step to lower the engine rpm.
Coolant Temp.
BVSV
Diaphragm
Choke Valve Fast Idle Cam Engine RPM
Below 55°C
CLOSED
Released by spring tension
Closed by automatic
Set at 1 st or 2nd step HIGH
(131°F)
(J-K) choke
Above 74°C OPEN
Pulled by manifold vacuum
OPEN Released to 4th step LOW
(165°F)
(J-K)