Lexus SC300 / Lexus SC400. Service manual — part 150

(Nakamichi)
1.

REMOVE POWER AMPLIFIER

(a) Remove the RH side cover.
(b) Remove the CD auto changer (See page

BE–212

power amplifier with the bracket.

(d) Remove four bolts and the power amplifier.

INSTALL WOOFER AMPLIFIER
For installation follow the removal procedure in reverse.

POWER AMPLIFIER INSPECTION

INSPECT POWER AMPLIFIER

(Circuit)
Disconnect the connector from power amplifier and inspect
the connector on the wire harness side as shown.
(Produced by PIONEER)

ÑÑÑÑÑÑÑ

Check for

ÑÑÑÑÑÑÑÑ

Tester connection

ÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑ

Condition

ÑÑÑÑÑÑÑÑ

Specified value

ÑÑÑÑÑÑÑ

Continuity

ÑÑÑÑÑÑÑÑ

B7–Ground

ÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑ

Constant

ÑÑÑÑÑÑÑÑ

Continuity

ÑÑÑÑÑÑÑ

Voltage

ÑÑÑÑÑÑÑÑ

B10–Ground

ÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑ

Constant

ÑÑÑÑÑÑÑÑ

Battery positive voltage

ÑÑÑÑÑÑÑ

ÑÑÑÑÑÑÑÑ

A14–Ground
A6 G

ÑÑÑÑÑÑÑÑÑÑÑ

Ignition switch position

ÑÑÑÑÑ

ACC or ON

ÑÑÑÑÑÑÑÑ

Battery positive voltage

ÑÑÑÑÑÑÑ

ÑÑÑÑÑÑÑÑ

A6–Ground

ÑÑÑÑÑÑÑÑÑÑÑ

ÑÑÑÑÑ

LOCK

ÑÑÑÑÑÑÑÑ

No voltage

If circuit is not as specified, refer to

BE–201

wiring diagrams

and inspect the circuits connected to other parts.

–

BODY ELECTRICAL SYSTEM

AUDIO SYSTEM

BE–211

(Produced by NAKAMICHI)

ÑÑÑÑÑÑÑ

Check for

ÑÑÑÑÑÑÑÑ

Tester connection

ÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑ

Condition

ÑÑÑÑÑÑÑÑ

Specified value

ÑÑÑÑÑÑÑ

Continuity

ÑÑÑÑÑÑÑÑ

B7–Ground
C7–Ground

ÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑ

Constant

ÑÑÑÑÑÑÑÑ

Continuity

ÑÑÑÑÑÑÑ

Voltage

ÑÑÑÑÑÑÑÑ

B10–Ground
C3–Ground

ÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑ

Constant

ÑÑÑÑÑÑÑÑ

Battery positive voltage

ÑÑÑÑÑÑÑ

ÑÑÑÑÑÑÑÑ

A6–Ground
A14–Ground

ÑÑÑÑÑÑÑÑÑÑÑ

Ignition switch position

ÑÑÑÑÑ

ACC or ON

ÑÑÑÑÑÑÑÑ

Battery positive voltage

ÑÑÑÑÑÑÑ

ÑÑÑÑÑÑÑÑ

C4–Ground
C6–Ground

ÑÑÑÑÑÑÑÑÑÑÑ

Ignition switch position

ÑÑÑÑÑ

LOCK

ÑÑÑÑÑÑÑÑ

No voltage

If circuit is not as specified, refer to

BE–203

wiring diagrams

and inspect the circuits connected to other parts.

CD AUTO CHANGER

CD AUTO CHANGER REMOVAL AND
INSTALLATION

REMOVE CD AUTO CHANGER
(a) Remove RH side cover.
(b) Disconnect two connectors.
(c) Remove three bolts, one nut and the CD auto changer.

CD AUTO CHANGER INSPECTION

INSPECT CD AUTO CHANGER

(Circuit)
Disconnect connectors from CD auto changer and inspect
the connector on the wire harness side as shown.

BE–212

–

BODY ELECTRICAL SYSTEM

AUDIO SYSTEM

ÑÑÑÑÑÑÑ

Check for

ÑÑÑÑÑÑÑÑ

Tester connection

ÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑ

Condition

ÑÑÑÑÑÑÑÑ

Specified value

ÑÑÑÑÑÑÑ

Voltage

ÑÑÑÑÑÑÑÑ

A4–Ground

ÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑ

Constant

ÑÑÑÑÑÑÑÑ

Battery positive voltage

ÑÑÑÑÑÑÑ

ÑÑÑÑÑÑÑÑ

A3–Ground

ÑÑÑÑÑÑÑÑÑÑÑ

Ignition switch

iti

ÑÑÑÑÑ

ACC or ON

ÑÑÑÑÑÑÑÑ

Battery positive voltage

ÑÑÑÑÑÑÑ

ÑÑÑÑÑÑÑÑ

A3–Ground

ÑÑÑÑÑÑÑÑÑÑÑ

position

ÑÑÑÑÑ

LOCK

ÑÑÑÑÑÑÑÑ

No voltage

ÑÑÑÑÑÑÑ

Continuity

ÑÑÑÑÑÑÑÑ

A7–Ground

ÑÑÑÑÑÑÑÑÑÑÑ

Luggage compartment
d

it h

ÑÑÑÑÑ

Push (OFF)

ÑÑÑÑÑÑÑÑ

No continuity

ÑÑÑÑÑÑÑ

ÑÑÑÑÑÑÑÑ

A7–Ground

ÑÑÑÑÑÑÑÑÑÑÑ

door courtesy switch

ÑÑÑÑÑ

Free (ON)

ÑÑÑÑÑÑÑÑ

Continuity

If circuit is not as specified, refer to

BE–201

, 203 wiring dia-

grams and inspect the circuits connected to other parts.
HINT:

•

Check the wire harness between the radio receiver
assembly and the CD auto changer in accordance with
the wiring diagrams in

BE–201

, 203.

•

Since the signals to and from the CDL+, CDL, CDR+,
CDR, TXM+, TXM, TXS+ and TXS terminals are serial
signals, they cannot ordinarily be measured with a
tester.

LUGGAGE COMPARTMENT DOOR
COURTESY SWITCH

(See page

BE–82

)

–

BODY ELECTRICAL SYSTEM

AUDIO SYSTEM

BE–213

MOTOR ANTENNA

MOTOR ANTENNA REMOVAL AND
INSTALLATION

1. REMOVE

MOTOR

ANTENNA

(a) Remove the antenna nut.
(b) Remove the LH side cover.
(c) Disconnect the motor antenna connector and the antenna

cord.

(d) Remove the nut and the motor antenna assembly.
2. INSTALL

MOTOR

ANTENNA

(a) Install the antenna nut.
(b) Connect the motor antenna connector and the antenna cord.
(c) Install the nut.

ANTENNA ROD REMOVAL AND
INSTALLATION

REMOVE ANTENNA ROD
HINT: Perform this operation with the battery negative (–)
cable connected to the battery terminal.

(a) Turn the ignition switch to ”LOCK” position.
(b) Remove the antenna nut.

(c–1) with CD player

Press the ”AM” and ”CD” buttons on the radio receiver, and
simultaneously turn the ignition switch to ”ACC” position.

(c–2) without CD player

Press the ”AM” and ”TAPE” buttons on the radio receiver, and
simultaneously turn the ignition switch to ”ACC” position.
HINT:

•

The rod will extend fully and be released from the motor
antenna.

•

After removing the antenna rod, leave the ignition switch
at ”ACC”.

NOTICE: To prevent body damage when the antenna rod is re-

leased, hold the rod while it comes out.

BE–214

–

BODY ELECTRICAL SYSTEM

AUDIO SYSTEM

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Lexus SC300 / Lexus SC400. Service manual — part 150

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