Water Temperature Switch - Toyota Celica Supra 1986 Service And Repair Manual

AC·20
AIR CONDITIONING SYSTEM- Functional Test and Adjustment
4. SOLAR SENSOR
Check sensor voltage.
0.3 - O.SV (In Daylight)
Double Vacuum Valve (OW)
(OW
is located on heater unit)
INSPECTION OF OW
CHECK VACUUM CIRCUIT CONTINUITY BY BLOWING
AIR
(a) OFF state
All circuit should be closed.
(b) Apply 12 volts to the positive (
+)
terminal and
ground te-rminal T
1
•
There should be continuity between B and C at this
time.
(c) Apply 12 volts to the positive
(+)
terminal and
ground terminal T
1
•
There should
be
continuity
be·
tween A and B at this time.
If a problem is found, replace the DVV.
Water Temperature Switch
INSPECTION OF WATER TEMPERATURE
SWITCH
CHECK WATE R TEMPERATURE SWITCH OPERATION
(a) Disconnect the 1-pole connector from the water
temp. switch.
lb) Check continuity between the water temp. switch
and ground as follows.
Cool.ant temp.
A B
Leu than 30°C (86° F•
CONTINUITY CONTINUITY
Fr~~ 1 ~0
C<
(~8"
Fl to
50
c
122 FL
NO CONTINUITY NO CONTINUITY
More than
50° C {122° F) NO CONTINUITY NO CONTI NUI TY
If a problem is found, replace water valve.