Lexus RX300 (MCU15). Manual — part 120

I04265

N20125

1

2

OFF

ON

N21361

Wire Harness Side

1

2

–

BODY ELECTRICAL

IGNITION SWITCH AND KEY UNLOCK WARNING
SWITCH

BE–27

LEXUS RX300 (RM785E)

3.

INSPECT IGNITION KEY ILLUMINATION OPERATION

Connect the positive (+) lead from the battery to terminal 1 and
the negative (–) lead to terminal 2, and check that the indicator
light lights up.
If operation is not as specified, replace the switch.
4.

INSPECT IGNITION KEY ILLUMINATION CIRCUIT
(See page DI–588)

5.

INSPECT KEY UNLOCK WARNING SWITCH CONTI-
NUITY

Switch position

Tester connection

Specified condition

OFF (Key removed)

–

No continuity

ON (Key set)

1 – 2

Continuity

If continuity is not as specified, replace the switch.

6.

INSPECT KEY UNLOCK WARNING SWITCH CIRCUIT
(See page DI–590)

Connect the switch connector and inspect the connector on
wire harness side from the back side, as shown.

Tester connection

Condition

Specified condition

1 – Ground

Constant

Continuity

If circuit is not as specified, inspect the circuits connected to oth-
er parts.

I19162

Headlight

Automatic Light Control Sensor

Ignition Switch

Taillight

R/B No.3 (LHD)
D DRL No.2 Relay

Engine Room J/B
D H–LP R LWR Fuse
D H–LP L LWR Fuse
D Headlight Control Relay
R/B No.2
D H–LP R UPR Fuse
D H–LP L UPR Fuse

Key Unlock Warning Switch

Combination Switch
D Light Control Switch
D Headlight Dimmer Switch

Instrument Panel J/B
D TAIL Fuse
D Taillight Control Relay

Driver Door
Courtesy Switch

BE04W–07

BE–28

–

BODY ELECTRICAL

HEADLIGHT AND TAILLIGHT SYSTEM

LEXUS RX300 (RM785E)

HEADLIGHT AND TAILLIGHT SYSTEM

LOCATION

BE04X–07

I04473

Combination Switch

D Light Control Switch
D Headlight Dimmer Switch

Switch Body

D Wiper and Washer Switch

Combination Switch

Spiral Cable

–

BODY ELECTRICAL

HEADLIGHT AND TAILLIGHT SYSTEM

BE–29

LEXUS RX300 (RM785E)

COMPONENTS

BE0U9–02

I04494

I04492

I04493

BE–30

–

BODY ELECTRICAL

HEADLIGHT AND TAILLIGHT SYSTEM

LEXUS RX300 (RM785E)

REMOVAL

1.

REMOVE COLUMN COVER

(a)

Remove the 3 screws.

(b)

Remove the column cover.

2.

REMOVE LIGHT CONTROL SWITCH

(a)

Disconnect the light control switch connector.

(b)

Remove the 2 screws.

(c)

Remove the switch.

3.

REMOVE WIPER AND WASHER SWITCH

(a)

Disconnect the wiper and washer switch connector.

(b)

Remove the 2 screws.

(c)

Remove the switch.