Combination Emission Control System Schematic - Chevrolet 10 1971 Series Chassis Service Manual

EMISSION CONTROL SYSTEMS 6T-2
1. Improved fuel economy due to lower idle speeds
under city traffic conditions.
2. Improved reliability because of fewer assembly plant
operations required to install the system.
3. Reduce electrical loads since only one solenoid is
required.
M A N I F O L D VACUUM
H OT
L I G H T '
W ATER
TEMP.
SWITCH
T I M E - D E L A Y
R E L A Y
A P P R O X . (15 SEC.)
Fig. 1— Combination Emission Control System Schematic
Broken or disconnected electrical connections resulting
in failure of the solenoid to function will result in no vac­
uum advance and no high gear deceleration throttle po­
sition. The valve will be serviced as a unit replacement
only.
I >
^ ___^ R E V E R S I N G R E L A Y
u " i r
T RA N SM ISS IO N SWITCH
(C L OS ED IN LO W G EA R S)
HIGH G EA R
D E C EL ER A T IO N
POSITION
BAT TERY
IGNITION SWITCH
E N E R G IZ E D
10-30 CHEVROLET TRUCK SERVICE MANUAL