Air Mix Damper Linkage; Sensor Circuit - Toyota Celica Supra 1986 Service And Repair Manual

AIR CONDITIONING SYSTEM- Functional Test and Adjustment
AC·19
Ambient SensOf
-
,
1
Air Mix Damper Linkage
1. REMOVE COMPONENTS FROM VEHICLE
(a}
Undercover
(b)
Center cluster
2. CHECK AIR MIX DAMPER
(a) Disconnect the rod from the clamp.
(b)
Disconnect the No.
4
vacuum hose between the DVV
and vacuum motor in the po\Ner servo unit to reluse
the vacuum pressure in the vacuum motor.
The stem of the
power
servo extends fully to the
maximum cooling position.
(c) Position the damper to maximum cooling and eon·
nect the rod to the clamp.
(d) Using a commercial vacuum pump, apply 250 mmHg
(9.84 ln.Hg, 33.3 kPa) of vacuum to the vacuum
motor and verity that the damper moves to the max·
imum heating position.
3. REINSTALL REMOVED PARTS IN REVERSE ORDER
Sensor Circuit
1.
IN.CAR SENSOR
(Located In console box )
Check sensor resi5tance.
1.7-5.6 kO (0 - 25• c or 32 -
77'FI
2. VERI FY AIR IS SUCKED IN IN·CAR SENSOR
NOTE: If there is
an
open circuit in the sensor, the
system will operate at maximum heating.
Conversely, if there is a short in the system, it will operate
at maximum cooling.
3. AMBIENT SENSOR
(Located on condenser)
Check sensor resistance.
0.4-0.6 kO (0- 25"C or 32 - 77'F)