Lexus LS400 (2000 year). Service manual — part 40

Z15808

–

BODY ELECTRICAL

POWER SOURCE

BE–29

1892

8.

INSPECT ENGINE ROOM NO.1 RELAY BLOCK

9.

FUSE CIRCUIT

Remove the fuse from the junction block and inspect the con-
nector on junction block side.
Connect numbers are shown in the illustration.

Fuse

Tester connection

Condition

Specified condition

H/CTRL H

1 – Ground

Constant

Battery positive voltage

*

2

DRL

7 – Ground

Engine running, Light control switch HEAD or

Dimmer switch FLASH

Battery positive voltage

H–LP R LWR

9 – Ground

Light control switch HEAD or Dimmer switch

FLASH

Battery positive voltage

H–LP L LWR

11 – Ground

Light control switch HEAD or Dimmer switch

FLASH

Battery positive voltage

*

1

USA models

*

2

CANADA models

If the circuit is not as specified, inspect the circuits connected
to other parts.
10.

RELAY CIRCUIT

Remove the relay from the relay block and inspect the connec-
tor on relay block side.
Connect numbers are shown in the illustration.
If the circuit is not as specified, inspect the circuits connected
to other parts.

Relay

Tester connection

Condition

Specified condition

ABS MTR

(1) – Ground

Constant

Battery positive voltage

ABS SOL

(6) – Ground

Constant

Continuity

ABS SOL

(5) – Ground

Constant

Battery positive voltage

Z15809

BE–30

–

BODY ELECTRICAL

POWER SOURCE

1893

11.

INSPECT ENGINE ROOM RELAY BLOCK NO.2

12.

RELAY CIRCUIT

Remove the relay from the relay block and inspect the connec-
tor on relay block side.
Connect numbers are shown in the illustration.

Relay

Tester connection

Condition

Specified condition

Height Control

(1) – Ground

Constant

Battery positive voltage

Condenser Fan No.1

(5) – Ground

Ignition switch ON

Battery positive voltage

Condenser Fan No.1

(8) – Ground

Ignition switch ON

Battery positive voltage

Condenser Fan No.2

(9) – Ground

Ignition switch ON

Battery positive voltage

Condenser Fan No.2

(12) – Ground

Ignition switch ON

Battery positive voltage

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

BE11X–01

I10507

Antenna

A

B

C

D

View ”A”

View ”B”

View ”C”

View ”D”

–

BE–231

2094

ANTENNA

LOCATION

BE11Y–01

I05587

2

5

I05580

2

5

Z08688

2

1

3

4 5

7

6

8

Wire Harness Side

BE–232

–

2095

INSPECTION

1.

Auto Antenna Models:
INSPECT ANTENNA MOTOR

(a)

Connect the positive (+) lead from the battery to terminal
2 and the negative (–) lead to terminal 5.

(b)

Check that the motor turns (moves upward).

NOTICE:
These tests must be done quickly (within 3 – 5 seconds) to
prevent the coil from burning out.

(c)

Then, reverse the polarity, check that the motor turns the
opposite way (moves downward).

NOTICE:
These tests must be done quickly (within 3 – 5 seconds) to
prevent the coil from burning out.

2.

Auto Antenna Models:
INSPECT ANTENNA MOTOR CONTROL RELAY CIR-
CUIT

Disconnect the connector from the relay and inspect the con-
nector on wire harness side, as shown in the chart below.

Tester connection

Condition

Specified condition

7 – Ground

Constant

Continuity

1 – Ground

Ignition switch ACC or ON,

and radio switch ON and Others

No voltage

1 – Ground

Ignition switch ACC or ON,

and radio switch ON and AM

Battery voltage

2 – Ground

Ignition switch ACC or ON,

and radio or tape or CD switch OFF

No voltage

2 – Ground

Ignition switch ACC or ON,

and radio or tape or CD switch ON

Battery voltage

3 – Ground

Constant

Battery voltage

5 – Ground

Ignition switch ACC or ON,

and radio switch OFF

No voltage

5 – Ground

Ignition switch ACC or ON,

and radio switch ON

Battery voltage