Toyota RM787U, Руководство по обслуживанию и ремонту

Страница: 1886 / 1976

AC0SN-02
I02430
2 1
I02429
4
AC-60
- AIR CONDITIONING COMPRESSOR AND MAGNETIC CLUTCH
1901
Author: Date:
2001 SIENNA (RM787U)
COMPRESSOR AND MAGNETIC
CLUTCH
ON-VEHICLE INSPECTION
1. INSPECT COMPRESSOR FOR METALLIC SOUND
(a) Start engine.
(b) Check there is abnormal metallic sound from the com-
pressor when the A/C switch is ON.
If abnormal sound is heard, replace the compressor assembly.
2.
INSPECT REFRIGERANT PRESSURE
(See page
AC-3 )
3. INSPECT COMPRESSOR LOCK SENSOR RESIS-
TANCE
(a) Disconnect the connector.
(b) Measure resistance between terminals 1 and 2.
Standard resistance: 65 - 125
Ω
at 20
°
C (68
°
F)
If resistance is not as specified, replace the compressor assem-
bly.
4.
INSPECT VISUAL FOR LEAKAGE OF REFRIGERANT
FROM SAFETY SEAL
Using a gas leak detector, check for leakage of refrigerant.
If there is any leakage, replace the compressor assembly.
5.
CHECK FOR LEAKAGE OF GREASE FROM CLUTCH
BEARING
6. CHECK FOR SIGNS OF OIL ON PRESSURE PLATE
If necessary repair or replace.
7.
INSPECT MAGNETIC CLUTCH BEARING FOR NOISE
(a) Start engine.
(b) Check for abnormal noise near the compressor when the
A/C switch is OFF.
If abnormal noise is being emitted, replace the magnetic clutch.
8.
INSPECT MAGNETIC CLUTCH OPERATION
(a) Disconnect the connector.
(b) Connect the positive (+) lead from the battery to terminal
4 and the negative (-) lead to the body ground.
(c) Check that the magnetic clutch is energized.
If operation is not as specified, replace the magnetic clutch.