Lexus LS400 (2000 year). Manual — part 54
Z14880
Connector B
Connector A
I03491
I03492
BE–44
–
BODY ELECTRICAL
HEADLIGHT AND TAILLIGHT SYSTEM
1907
15.
INSPECT DAYTIME RUNNING LIGHT RELAY NO.3
AND NO.4 CONTINUITY
Tester connection
Condition
Specified condition
A1 – B3
Constant
Continuity
A3 – A5
Constant
Continuity
B3 – B4
Constant
Continuity
A2 – A5
Apply battery positive voltage between
terminal A1 and B3.
Continuity
B1 – B2
Apply battery positive voltage between
terminal B3 and B4.
Continuity
If continuity is not as specified, replace the relay.
16.
INSPECT AUTOMATIC LIGHT CONTROL
AUTO ON:
(a)
Turn the ignition switch ON.
(b)
Turn the light control switch to AUTO.
(c)
Gradually cover the top of the sensor.
(d)
Verify that the lights should turn ON the accessory lights
and the headlights.
17.
INSPECT AUTOMATIC LIGHT CONTROL
AUTO OFF:
(a)
Gradually expose the sensor.
(b)
Verify that the lights should turn OFF the headlights and
the accessory lights.
Z14888
1 2 3 4 5 6 7 8
Wire Harness Side
–
BODY ELECTRICAL
HEADLIGHT AND TAILLIGHT SYSTEM
BE–45
1908
18.
INSPECT LIGHT–OFF CONDITION
(a)
Turn the ignition switch ON.
(b)
Gradually cover the top of the sensor.
Lights auto ON:
(c)
Verify that the lights will go out when light control switch
position OFF or the area surrounding the sensor gets
bright or open the driver’s door while the ignition switch is
OFF.
19.
INSPECT LIGHTS–ON CONDITION
(a)
Open the driver’s door while the ignition switch is OFF.
(b)
Turn the light control switch to AUTO leaving the door
open and cover the top of the sensor, and verify that the
lights go on when the ignition switch is turned ON.
20.
ADJUST AUTOMATIC LIGHT CONTROL SENSOR
Using the LEXUS hand–held tester with customize soft
installed, adjust the automatic light control sensor.
If response is too quick, turn the knob counterclock-
wise.
If response is too slow, turn the knob clockwise.
21.
INSPECT AUTOMATIC LIGHT CONTROL SENSOR
CIRCUIT
Connector disconnected
Disconnect the connector from the sensor and inspect the con-
nector on the wire harness side, as shown in the chart.
Tester connection
Condition
Specified condition
6 – Ground
Constant
Continuity
4 – Ground
Ignition switch position LOCK or ACC
No voltage
4 – Ground
Ignition switch position ON
5.2 – 9.0 V
5 – Ground
Ignition switch position LOCK or ACC
No voltage
5 – Ground
Ignition switch position ON
Battery positive voltage
If circuit is as specified, perform the inspection on the following
page.
If the circuit is not as specified, inspect the circuit connected to
other parts.
N12999
From Back Side
6 5
4
BE–46
–
BODY ELECTRICAL
HEADLIGHT AND TAILLIGHT SYSTEM
1909
Connector connected
Connect the wire harness side connector to the sensor and in-
spect wire harness side connector from the back side, as
shown.
HINT:
Ignition switch ON.
Light control switch AUTO.
Vehicle’s surroundings are bright.
Tester connection
Condition
Specified condition
6 – Ground
Constant
1 V or less
5 – Ground
Ignition switch position LOCK or ACC
1 V or less
5 – Ground
Ignition switch position ON
9.5 V or more
4 – Ground
Vehicle’s surroundings are dark.
(Sensor is covered)
Taillight and headlight are ON
If circuit is as specified, try replacing the sensor with a new one.
If the circuit is not as specified, inspect the circuit connected to
other parts.
BE11V–01
I09287
Adjusting Bolt A
Low Beam Center Mark
High Beam Center Mark
VOR Mark
Halogen Type:
I03416
Low Beam Center Mark
H
9.84 ft
W
V (RH)
V (LH)
V
V
V (LH)
V (RH)
W
0.4
°
0.4
°
45
°
15
°
2.7
in.
–
BODY ELECTRICAL
HEADLIGHT AND TAILLIGHT SYSTEM
BE–47
1910
ADJUSTMENT
1.
Halogen Type:
ADJUST HEADLIGHT AIM ONLY
(a)
Put the vehicle in below conditions.
Make sure the body around the headlight is not de-
formed.
Park the vehicle on a level spot.
The driver gets into the driver’s seat and puts the
vehicle in a state ready for driving (with a full tank).
Bounce the vehicle several times.
(b)
Prepare the thick white colored paper.
(c)
Stand the paper perpendicularly and ensure the distance
from it to the head lights is 9.84 ft.
(d)
Ensure that the center line of vehicle and the paper are
at a 90 degree angle as shown in the illustration.
(e)
Draw a horizontal line on the paper where the head lights
(low beam center mark) of the vehicle are to be.
(f)
Draw a vertical line on the paper where the center line of
the vehicle is to be. (V line)
(g)
Turn the head lights ON.
(h)
Check that the head lights light up the paper as shown in
the illustration.
HINT:
As shown in the illustration, adjust aiming of the LH and RH
lights respectively.
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