Datsun 620 Series 1977 Service Manual page 17

Engine Tune
up
EMISSION CONTROL SYSTEM
PIPING
California models
1 Vacuum tube
to
distributor
yellow
2 Vacuum tube
to
carbon
canister
yellow
3 Thermal
Vacuum
valve
to
E G
R control
valve white
4 Vacuum tube
to
thermal
vacuum
valve
white
5 Vacuum tube
6 Vacuum tube to
carburetor yellow
7 Vacuum hose
connector to
intake manifold
green
8 Vacuum tube to
carburetor white
9 Air
con
tro
valve
to
vacuum
hose
connector green
10 A B valve
to vacuum
connector
green
11 D C D D to control
valve white
12 B C D D control valve to
intake manifold
green
13 Vacuum hose
connector to
E
A R
control
valve
green
14 D C D D control valve to
air pump
air
cleaner
ET368
Fig ET
4 Emission control
system piping California
models
ET5