Lexus GS300/400 (2000 year). Service manual — part 69

BE0N6–04

I05587

2

5

I05580

2

5

Z08688

2

1

3

4 5

7

6

8

Wire Harness Side

–

BODY ELECTRICAL

ANTENNA

BE–225

2526

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 positive 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 positive voltage

3 – Ground

Constant

Battery positive voltage

4 – Ground

Ignition switch ACC or ON,

and radio switch ON and Others

No voltage

4 – Ground

Ignition switch ACC or ON,

and radio switch ON and

AM or FM (87.9 – 96.0 MHz)

Battery positive 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 positive voltage

BE–226

–

BODY ELECTRICAL

ANTENNA

2527

6 – Ground

Ignition switch ACC or LOCK

No voltage

6 – Ground

Ignition switch ON

Battery positive voltage

8 – Ground

Ignition switch LOCK

No voltage

8 – Ground

Ignition switch ACC or ON

Battery positive voltage

If circuit is as specified, replace the relay.

BE0G0–05

1

CLOCK WILL NOT OPERATE

PASSENGER SEAT BELT WARNING LIGHT DOES NOT OPERATE

I04264

Wire Harness Side

5

4

3

6

1

RAD NO.2 Fuse

DOME Fuse

Combination
Meter

Body ECU
No.2

Ground

ACC

+B

PBEW

ILL

E

Clock Assembly

–

BODY ELECTRICAL

CLOCK

BE–227

2528

CLOCK

TROUBLESHOOTING

HINT:
Troubleshoot the clock according to the table below.

Troubleshooting

No.

Passenger seat belt warning light does not light up.

1

Clock will not operate

1

Clock loses or gains time

2

±

1.5 seconds / day

INSPECT CLOCK CIRCUIT
(See page

DI–849

)

TROUBLESHOOTING NO.1

(a)

Check that the battery positive voltage is 10 – 16 V.

If voltage is not as specified, replace the battery.
(b)

Check that the DOME and RAD NO.2 fuses are not
blown.

If the fuse is blown, replace the fuse and check for short.
(c)

Troubleshoot the clock as follows.

HINT:
Inspect the connector on the wire harness side.

Yes

Yes

No

No

Is there battery positive voltage between terminal +B and
body ground?

Is there battery positive voltage between terminal ACC and
body ground?

Replace clock.

+B wire harness faulty.

Yes

No

Is there continuity between terminal GND and
body ground?

Ground wire harnss faulty.

ACC wire harness faulty.

2

CLOCK LOSES OR GAINS TIME

I04264

Wire Harness Side

5

4

3

6

1

RAD NO.2 Fuse

DOME Fuse

Combination
Meter

Body ECU
No.2

Ground

ACC

+B

PBEW

ILL

E

Clock Assembly

Yes

Is there battery positive voltage between terminal +B and
body ground?

Adjust or replace clock.

Bellow 10 V

Locate cause and repair, or recharge battery.

Yes

Is there battery positive voltage between terminal ACC and
body ground?

Bellow 10 V

Locate cause and repair, or recharge battery.

BE–228

–

BODY ELECTRICAL

CLOCK

2529

TROUBLESHOOTING NO.2

(a)

Check that the battery positive voltage is 10 – 16 V.

If voltage is not as specified, replace the battery.
(b)

Inspect the error of the clock.
Allowable error (per day):

±

1.5 seconds

If the error exceeds the allowable error, replace the clock.
(c)

Check that the clock adjusting button is sticking in posi-
tion and has failed to return.

If the error exceeds the allowable error, replace the clock.
(d)

Troubleshoot the clock as follows.

HINT:
Inspect the connector on the wire harness side.