Lexus RX300 (MCU15). Manual — part 101
I06870
Magnetic Clutch
Relay
AC1NM–01
Z18060
1
2
3
5
3
5
2
1
AC–72
–
AIR CONDITIONING
MAGNETIC CLUTCH RELAY
LEXUS RX300 (RM785E)
MAGNETIC CLUTCH RELAY
INSPECTION
1.
REMOVE MAGNETIC CLUTCH RELAY
(Marking : MG CLT) FROM ENGINE ROOM JUNCTION
BLOCK
2.
INSPECT MAGNETIC CLUTCH RELAY
(Marking : MG CLT) CONTINUITY
Condition
Tester connection
Specified condition
Constant
1 – 2
Continuity
Apply B+ between
terminals 1 and 2
3 – 5
Continuity
If continuity is not as specified, replace the relay.
3.
INSTALL MAGNETIC CLUTCH RELAY TO ENGINE
ROOM JUNCTION BLOCK
I06870
Fan No. 1
Relay
Fan No. 2
Relay
Fan No. 2 Relay
AC3AY–01
I05741
1
2
3
4
1
2
3
4
I18286
5
3
1
2
3
4
5
1
2
4
–
AIR CONDITIONING
COOLING FAN RELAY
AC–73
LEXUS RX300 (RM785E)
COOLING FAN RELAY
INSPECTION
1.
REMOVE RELAY
2.
INSPECT FAN NO. 1, 3 RELAY CONTINUITY
Condition
Tester connection
Specified condition
Constant
3 – 4
Continuity
Apply B + between termi-
nals 3 and 4.
1 – 2
No Continuity
If continuity is not as specified, replace the relay.
3.
INSPECT FAN NO. 2 RELAY CONTINUITY
Condition
Tester connection
Specified condition
Constant
3 – 5
2 – 4
Continuity
Apply B + between termi-
nals 5 and 3.
1 – 2
Continuity
If continuity is not as specified, replace the relay.
AC1NN–02
I07792
1
2
AC–74
–
AIR CONDITIONING
CONDENSER FAN
LEXUS RX300 (RM785E)
CONDENSER FAN
ON–VEHICLE INSPECTION
1.
INSPECT CONDENSER FAN OPERATION
Inspect the fan operation in these conditions, as shown in the
chart below.
Test conditions:
S
Start engine
S
Blower speed control switch position ”HI”
S
Temperature control dial at ”COOL” position
S
Set manifold gauge set
S
A/C switch ON
Condition
Fan operation (Fan speed)
Engine coolant temperature
90
°C (194 °F) or below
Rotate (Low speed)
Engine coolant temperature
95
°C (203 °F) or above
Rotate (High speed)
Refrigerant pressure is less than
1,520 kPa (15.5 kgf/cm
2
, 220 psi)
Rotate (Low speed)
Refrigerant pressure is 1,520 kPa
(15.5 kgf/cm
2
, 220 psi) or above
Rotate (High speed)
If operation is not as specified, proceed to the next inspection.
2.
INSPECT CONDENSER FAN MOTOR OPERATION
(a)
Disconnect the fan connector.
(b)
Connect battery and ammeter to the fan connector, as
shown in the illustration.
(c)
Check that the fan rotates smoothly and check the read-
ing on the ammeter.
Specified amperage: 9.8 ± 1.5 A at 20 °C (68 °F)
If operation is not as specified, replace the fan motor (See page
CO–26).
If operation is as specified, check the pressure switch, cooling
fan relays and water temp. switch (See page CO–33,
CO–34).
I07790
AC1NR–01
I07791
I08486
–
AIR CONDITIONING
AIR REFINER FILTER
AC–75
LEXUS RX300 (RM785E)
AIR REFINER FILTER
REPLACEMENT
1.
REMOVE LOWER COVER FROM LOWER NO.2 FIN-
ISH PANEL
2.
REMOVE AIR REFINER FILTER
(a)
Remove the filter cover.
(b)
Pull out the filter.
(c)
Remove the filter from the flame.
3.
INSTALL NEW FILTER
(a)
Install the new filter to the flame.
(b)
Install the filter to blower unit.
(c)
Install the filter cover.
4.
INSTALL LOWER COVER TO LOWER NO.2 FINISH
PANEL
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