Lexus SC300 / Lexus SC400. Manual — part 151

INSTALL ANTENNA ROD

(a) Insert the cable of the rod until it reaches the bottom.

HINT:

•

When inserting the cable, the teeth on the cable must
face toward the rear of the vehicle.

•

Insert the cable approx. 400 mm (15.75 in.).

(b) Wind

the

cable to retract the rod by turning the ignition switch

to ”LOCK” position.
HINT:

•

If the ignition switch is already in ”LOCK” position,
perform step 1.

•

In case the cable is not wound, twist it as shown in the
illustration.

•

Even if the rod has not retracted fully, install the antenna
nut and inspect the antenna rod operation. It will finally
retract fully.

band select buttons.

MOTOR ANTENNA INSPECTION

1. INSPECT

MOTOR

ANTENNA

(Circuit)
Disconnect the motor antenna connector from the body wire
harness and inspect the connector on body wire harness side
as shown.

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Check for

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Tester connection

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Condition

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Specified value

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Continuity

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7–Ground

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Constant

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Continuity

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Voltage

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3–Ground

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Constant

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Battery positive voltage

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8–Ground

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Ignition switch

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ACC or ON

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Battery positive voltage

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8–Ground

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position

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LOCK

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No voltage

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ÑÑÑÑÑÑÑÑ

6–Ground

ÑÑÑÑÑÑÑÑ

Ignition switch

ÑÑÑÑÑÑÑÑÑÑÑ

ÑÑÑÑÑÑÑÑÑ

Battery positive voltage

ÑÑÑÑ

ÑÑÑÑÑÑÑÑ

6–Ground

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position

ÑÑÑÑÑÑÑÑÑÑÑ

ACC or LOCK

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No voltage

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ÑÑÑÑÑÑÑÑ

2–Ground

ÑÑÑÑÑÑÑÑ

Ignition switch

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Radio or Tape or CD switch ON

ÑÑÑÑÑÑÑÑÑ

Battery positive voltage

ÑÑÑÑ

ÑÑÑÑÑÑÑÑ

2–Ground

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ACC or ON

ÑÑÑÑÑÑÑÑÑÑÑ

Radio or Tape or CD switch OFF

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No voltage

ÑÑÑÑ

ÑÑÑÑÑÑÑÑ

5–Ground

ÑÑÑÑÑÑÑÑ

Ignition switch

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Radio switch ON

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Battery positive voltage

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ÑÑÑÑÑÑÑÑ

5–Ground

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ACC or ON

ÑÑÑÑÑÑÑÑÑÑÑ

Radio switch OFF

ÑÑÑÑÑÑÑÑÑ

No voltage

ÑÑÑÑ

ÑÑÑÑÑÑÑÑ

4–Ground

ÑÑÑÑÑÑÑÑ

Ignition switch
ACC or ON and

ÑÑÑÑÑÑÑÑÑÑÑ

AM or FM (87.9 – 96.0 MHz)

ÑÑÑÑÑÑÑÑÑ

Battery positive voltage

ÑÑÑÑ

ÑÑÑÑÑÑÑÑ

4–Ground

ÑÑÑÑÑÑÑÑ

ACC or ON and
radio switch ON

ÑÑÑÑÑÑÑÑÑÑÑ

Others

ÑÑÑÑÑÑÑÑÑ

No voltage

ÑÑÑÑ

ÑÑÑÑÑÑÑÑ

1–Ground

ÑÑÑÑÑÑÑÑ

Ignition switch
ACC or ON and

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ÑÑÑÑÑÑÑÑÑ

Battery positive voltage

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radio switch ON

ÑÑÑÑÑÑÑÑÑÑÑ

Others

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No voltage

If circuit is not as specified, inspect radio or wire harness. If
circuit is as specified, replace motor antenna.

–

BODY ELECTRICAL SYSTEM

AUDIO SYSTEM

BE–215

INSPECT ANTENNA MOTOR

(a) Install antenna nut.
(b) Disconnect connector from the motor antenna control relay.
(c) Connect the positive (+) lead from the battery to terminal 2

and the negative (–) lead to terminal 5 on the wire harness
side connector.

(d) Check that the motor turns (moves upward).

NOTICE: These tests must be performed quickly (within 4–8

seconds) to prevent the coil from burning out.

(e) Then, reverse the polarity, check that the motor turns the

opposite way (moves downward).

NOTICE: These tests must be performed quickly (within 4–8

seconds) to prevent the coil from burning out.

HINT: When the motor is normal, lower the antenna to the
lower most position.
If operation is not as specified, replace the antenna motor as-
sembly.

GLASS PRINTED ANTENNA

GLASS PRINTED ANTENNA
INSPECTION

INSPECT GLASS PRINTED ANTENNA
(Use same procedure as for ”INSPECT DEFOGGER
WIRES” on page

BE–173

REPAIR GLASS PRINTED ANTENNA
(Use same procedure as for ”REPAIR DEFOGGER WIRES”
on page

BE–174

BE–216

–

BODY ELECTRICAL SYSTEM

AUDIO SYSTEM

ANTENNA CORD

ANTENNA CORD REMOVAL AND
INSTALLATION

REMOVE ANTENNA CORD

(a) Remove the following parts:

•

Instrument panel assembly

•

Right front pillar garnish

•

Roof headlining

•

Roof side inner garnish

•

Right center pillar garnish

•

Right rear pillar garnish

•

Package tray trim

•

Room partition trim

•

Luggage compartment RH cover

•

Luggage compartment trim front cover

HINT: (See BO–section.)

(b) Remove antenna cord from motor antenna and glass printed

antenna.

INSTALL ANTENNA CORD
For installation follow the removal procedure in reverse.

–

BODY ELECTRICAL SYSTEM

AUDIO SYSTEM

BE–217

TROUBLESHOOTING

NOTICE: When replacing the internal mechanism (ECU part) of the audio system, be careful that no part
of your body or clothing comes in contact with the terminals of the leads from the IC, etc. of the replace-
ment part (spare part).

HINT:

This inspection procedure is simple troubleshooting which should be carried out on the vehicle during
system operation and is based on the assumption that the cause of trouble lies with the system
components (excluding the wires and connectors, etc.).
Always inspect the trouble taking the following items into consideration.

Open or short circuit of the wire harness

Connector or terminal connection fault

The cassette tape or compact disc itself may be causing the trouble, so when troubleshooting the tape
player or CD player, always use a different cassette tape or compact disc first of all to check operation
of the tape player or CD player.

For some of problems in the following problem chart, the AUDIO SYSTEM CHECKER can be used
to inspect malfunctions of the Radio or Tape Player, and the CD PLAYER CHECKER can be used to
inspect the CD player.
The portions indicated by on the flow charts on the following pages can be inspected using a CHECK-
ER.
For instructions on how to connect the checker to the vehicle and how to use the checker, please refer
to the instruction Manual for AUDIO SYSTEM CHECKER or CD PLAYER CHECKER.

BE–218

–

BODY ELECTRICAL SYSTEM

AUDIO SYSTEM

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Lexus SC300 / Lexus SC400. Manual — part 151

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