Mazda 323 1988 Workshop Manual page 335

TURBOCHARGING SYSTEM
4B
L
83"04B-11
Pressure switch
(For overbocst detection
2
)
Waste Gate Valve
1. Cool the engine.
2. EW&ve the waste gate actuator hose and attach
3. Adjust the compressed air pressure to 48.1-58.9
kPa (0.49-0.80 kg/cm2, 7.0-8.8 psi).
4. Check that the rod moves when disconnecting and
reconnecting the hose applying the compressed
air.
Caution
Do not apply compressed air higher than 98
kPa (1.0 kg/cm', 14 psi).
Pressure Switch
1. Turn the ignition switch ON.
2. Disconnect the hose from the pressure switch and
attach SST.
3. Adjust the compressed air pressure to 71.8-79.8
kPa (0.73-0.81 kg/cm*, 10.4-l 1.8 psi).
4. Make sure that the warning buzzer sounds while
applying the compressed air.
5. If the warning buzzer does not sound, inspect as
described below.
Inspection of voltage
1. Turn the ignition switch ON.
2. Apply air pressure of 71.8-79.8kPa (0.73-0.81
kg/cm*, 10.4-11.8 psi) to the pressure switch,
then check the voltage at the (Lg),and (B) termi-
nals with the connector connected.
Condition
I
L!2
I
B
Compressed air applied
( 12v / ov
Compressed air not applied / ov I ov
If the voltage is not correct, go to next step
lnspectlon of the pressure switch
1. Turn the ignition switch OFF.
2. Disconnect the pressure switch connector.
3. Apply air pressure of 71.8-79.8 kPa (0.73-0.81
kg/cm', 10.4-l 1.8 psi) to the pressure switch,
then check the continuity between the terminals.
Condition
I
Continuity
Compressed air applied
Yes
Compressed air not applied
I
No
If the continuity is not good, replace the pressure
switch.
323
Revised 10187
48-63