REPLACING ELECTRIC SWITCHING VALVE
- black, red or white -
Detach vacuum hoses.
Installation: Connect hoses that colors match.
(Also refer to hose routing plan.)
Disconnect plugs (1 ... 3).
Take electric switching valve out of holder.

HOSE ROUTING PLAN
a) BMW 630 CSi
1 Distributor vacuum box
2 Reactor
3 Throttle housing
4 Auxiliary air valve (n/a to 1977 models)
5 Vacuum control
6 Check valve
7 Carbon filter
8 Booster blowoff valve
9 EGR valve
10 Pressure converter
11 Black electric switching valve
12 Red electric switching valve
13 White electric switching valve

HOSE ROUTING PLAN
b) BMW 633 CSi
( 49 State Version Manual and Automatic Transmission - Low Altitude - USA 1978)
1 Distributor vacuum box
2 Reactor
3 Throttle housing
4 Throttle bypass valve
5 Vacuum control
6 Check valve
7 Active carbon filter
8 Pressure regulator
9 Blowoff valve
10 EGR valve
11 Pressure converter
13 Red electric valve
14 Blue electric valve
Hose (S) is omitted and connection (A)
is plugged on California and 49 State
Highe Altitude models with an automatic
transmission.

HOSE ROUTING PLAN
c) BMW 633 CSi
(California and 49 State High Altitude Version with Manual Transmission USA 1978)
1 Distributor vacuum box
2 Reactor
3 Throttle housing
4 Throttle pypass valve
5 Vacuum control
6 Check valve
7 Active carbon filter
8 Pressure regulator
9 Blowoff valve
10 EGR valve
11 Pressure converter
12 Black electric switching valve
13 Red electric switching valve
14 Blue electric switching valve