Lexus RX300 (MCU15). Manual — part 132

I04524

0 Ω

10 kΩ

5

1

I04525

I04523

I04526

Driver side

Passenger side

1

3

1

3

–

BODY ELECTRICAL

COMBINATION METER

BE–75

LEXUS RX300 (RM785E)

24.

LHD:
INSPECT LIGHT CONTROL RHEOSTAT OPERATION

Gradually, turn the rheostat knob from the bright side to dark
side and check that the resistance decreases from 10 kΩ to 0
Ω

between terminal 4 and 5. (Rheostat knob turned to clock-

wise)
If operation is not as specified, replace the rheostat light control.

25.

INSPECT WINDOW WASHER LEVEL WARNING
LIGHT

(a)

Disconnect the connector from the warning switch and
ground terminal on the wire harness side connector.

(b)

Engine running and check that the warning light lights up.

If the warning light does not light up, inspect the bulb or wire har-
ness.

26.

INSPECT WINDOW WASHER LEVEL WARNING
SWITCH CONTINUITY

(a)

Check that no continuity exists between the terminals with
the switch OFF (float up).

(b)

Check that continuity exists between the terminals with
the switch ON (float down).

If operation is not as specified, replace the switch or inspect
ground point.

27.

INSPECT SEAT BELT WARNING LIGHT

(a)

Disconnect the connector from the buckle switch and
ground terminal on the wire harness side connector as
shown in the illustration.

(b)

Turn the ignition switch ON and check that the warning
light lights up.

If the warning light does not light up, check the bulb circuit (See
page DI–551).

I04527

2

1

3

ON

OFF

I04528

2

1

3

OFF

ON

I04529

Pressing

BE–76

–

BODY ELECTRICAL

COMBINATION METER

LEXUS RX300 (RM785E)

28.

Driver’s Side:
INSPECT SEAT BELT BUCKLE SWITCH CONTINUITY

(a)

Check that continuity exists between the terminals 2 and
3 on the switch side connector with the switch ON (belt
fastened).

(b)

Check that continuity exists between the terminals 1 and
3 on the switch side connector with the switch OFF (belt
unfastened).

If operation is not as specified, replace the switch.

29.

Passenger ’s Side:
INSPECT SEAT BELT BUCKLE SWITCH CONTINUITY

(a)

Check that continuity exists between the terminals 1 and
3 on the switch side connector with the switch ON (belt
fastened).

(b)

Check that continuity exists between the terminals 2 and
3 on the switch side connector with the switch OFF (belt
unfastened).

If operation is not as specified, replace the switch.
30.

Driver side:
INSPECT SEAT BELT BUCKLE SWITCH CIRCUIT (See
page DI–586)

31.

Passenger seat only:
INSPECT SEAT BELT WARNING OCCUPANT DETEC-
TION SENSOR CONTINUITY

Check that continuity exists between the terminals 1 and 2
when pressing the sensing part.
If operation is not as specified, replace the sensor.

BE0C4–01

–

BODY ELECTRICAL

COMBINATION METER

BE–77

LEXUS RX300 (RM785E)

REASSEMBLY

Installation is in the reverse order of disassembly. (See page BE–67)

BE0GS–13

I19141

Defogger Wire

Engine Room J/B
D Rear Defogger Relay

Ignition Switch

Center Cluster Integration Panel
D Rear Defogger Switch

Instrument Panel J/B
D HEATER Fuser

Mirror Assembly
D Mirror Defogger

BE–78

–

BODY ELECTRICAL

DEFOGGER SYSTEM

LEXUS RX300 (RM785E)

DEFOGGER SYSTEM

LOCATION