Toyota RM787U, Руководство по обслуживанию и ремонту

Страница: 1864 / 1976

AC-8
- AIR CONDITIONING AIR CONDITIONING SYSTEM
1849
Author: Date:
2001 SIENNA (RM787U)
3. INSPECT IDLE-UP SPEED
(a) Warm up engine
(b) Inspect idle-up speed when the these conditions are es-
tablished.
Test conditions:
Blower speed control set at ”HI”
Temperature control set at ”MAX COOL”
A/C switch ON
Put gear shift in neutral
Magnetic clutch condition Idle speed
Magnetic clutch not engaged 700
±
50 rpm
Magnetic clutch engaged 750
±
50 rpm
If idle speed is not as specified, check idle air control system.
4. INSPECT FOR LEAKAGE OF REFRIGERANT
(a) Perform under these conditions:
Stop engine
Secure good ventilation (If not, the gas leak detec-
tor may react to volatile gases which are not refrig-
erant, such as evaporated gasoline or exhaust
gas.)
Repeat the test 2 or 3 times
Make sure that there is some refrigerant remaining
in the refrigeration system.
When compressor is OFF: Approx. 392 - 588 kPa
(4 - 6 kgf/cm
2
, 57 - 85 psi)
(b) Bring the gas leak detector close tor the drain hose before
performing the test.
HINT:
After the blower motor is stopped, leave the cooling unit
for more than 15 minutes.
Expose the gas leak detector sensor the under the drain
hose.
When bring the gas leak detector close to the drain hose,
make sure that the gas leak detector does not reach to the
volatile gases.
If such reaction is unavoidable, the vehicle must be lifted up.
(c)
If gas leak is not detected through the drain hose, remove
the blower linear controller from the cooling unit. Then in-
sert the gas leak detector sensor into the unit and perform
the test.
(d) Disconnect the connector and lever the pressure switch
for approx. 20 minutes. Then bring the gas leak detector
close to the pressure switch and perform the test.
(e) Bring the gas leak detector close to the refrigerant lines
and perform the test.
HINT:
Make sure that there is no dirt on joints.