Lexus LS400 (2000 year). Manual - part 60

Z08889

OFF

ON

2

1

BE0BQ–01

BE5710

Wire Harness Side

1

2

BE–68

–

BODY ELECTRICAL

ILLUMINATION LIGHT SYSTEM

1931

INSPECTION

1.

INSPECT GLOVE BOX LIGHT SWITCH CONTINUITY

Switch position

Tester connection

Specified condition

OFF (Closed)

 –

No Continuity

ON (Opened)

1 – 2

Continuity

If continuity is not as specified, replace the relay.

2.

INSPECT GLOVE BOX LIGHT SWITCH CIRCUIT

Disconnect the connector from the switch and inspect the con-
nector on the wire harness side, as shown.

Tester connection

Condition

Specified condition

1 – Ground

Light control switch position OFF

No voltage

1 – Ground

Light control switch position TAIL or HEAD

Battery positive voltage

2 – Ground

Constant

Continuity

If the circuit is not as specified, inspect the circuits connected
to other parts.

BE0BR–01

I03264

Engine Room Junction Block

 DOME Fuse

Body ECU

Ignition Switch

 Key Unlock Warning Switch

Instrument Panel Junction Block

 RAD No.2 Fuse

 GAUGE Fuse

Door Lock Assembly

 Door Courtesy Switch

 Door Unlock Detection Switch

Stop Light

Rear Personal Light Assembly

 Rear Room Light

 Rear Room Light Switch

 Rear Door Courtesy Light

Front Personal
Light

Front Passenger Door ECU

Vanity Light

Driver Door ECU

Luggage Compartment
Light

Courtesy Switch
(Luggage Compartment Door)

–

BODY ELECTRICAL

INTERIOR LIGHT SYSTEM

BE–69

1932

INTERIOR LIGHT SYSTEM

LOCATION

BE5671

Continuity

No continuity

ON

BE0BS–01

N13306

(c) Close

(b) Open

I03245

BE–70

–

BODY ELECTRICAL

INTERIOR LIGHT SYSTEM

1933

INSPECTION

1.

INSPECT DOOR OUTSIDE HANDLE SWITCH CONTI-
NUITY

(a)

Check that there is continuity between terminals 1 and 2
when door outside handle is pulled.

(b)

Check that there is no continuity between terminals 1 and
2 when door outside handle is released.

If operation is not as specified, replace the switch.

2.

INSPECT COURTESY SWITCH CONTINUITY

(a)

Connect the connector to the driver door ECU.

(b)

Check that there is continuity between terminals 3 and 6
when door is opened.

(c)

Check that there is no continuity between terminals 3 and
6 when door is closed.

If continuity is not as specified, replace the switch.
If continuity is as specified, inspect the switch circuit.
3.

Driver’s door:
INSPECT COURTESY SWITCH CIRCUIT
(See page 

DI–745

)

4.

Passenger ’s door:
INSPECT COURTESY SWITCH CIRCUIT
(See page 

DI–777

)

5.

Rear left door:
INSPECT COURTESY SWITCH CIRCUIT
(See page 

DI–805

)

6.

Rear right door:
INSPECT COURTESY SWITCH CIRCUIT
(See page 

DI–828

)

7.

INSPECT FRONT PERSONAL LIGHT SWITCH CONTI-
NUITY

Switch position

Tester connection

Specified condition

Interior Light Switch

OFF (Lever Switch)

–

No continuity

Interior Light Switch

DOOR (Lever Switch)

1 – 3

Continuity

Interior Light Switch

ON (Lever Switch)

1 – 2

Continuity

Personal Light OFF

(Push Switch)

–

No continuity

* Personal Light ON

(Push Switch)

1 – 2

Continuity

* Set to the interior light switch to OFF or DOOR
If continuity is not as specified, replace the light assembly or
bulb.

I03432

Wire Harness Side

Z14891

Rear Room Light

ON

Z14892

Rear Door Courtesy Light

–

BODY ELECTRICAL

INTERIOR LIGHT SYSTEM

BE–71

1934

8.

INSPECT FRONT PERSONAL LIGHT SWITCH CIR-
CUIT

Disconnect the connector from the switch and inspect the con-
nector on the wire harness side, as shown.
If circuit is not as specified, inspect the power source or wire
harness.

Tester connection

Condition

Specified condition

2 – Ground

Constant

Continuity

5 – Ground

Constant

Continuity

1 – Ground

Constant

Battery positive voltage

4 – Ground

Constant

Battery positive voltage

9.

INSPECT REAR PERSONAL LIGHT ASSEMBLY CON-
TINUITY
Rear room light:

Switch position

Tester connection

Specified condition

Room light switch off

and door close

–

No continuity

Room light switch on

and door close

1 – 2

Continuity

Room light switch off

or ON and door open

1 – 3

Continuity

If continuity is not as specified, replace bulb or rear personal
light assembly.

10.

INSPECT REAR PERSONAL LIGHT ASSEMBLY CON-
TINUITY
Rear door courtesy light:

Using the ohmmeter, check that there is continuity between ter-
minals.
If continuity is not as specified, replace the bulb or rear personal
light assembly.