Lexus SC300 / Lexus SC400. Manual — part 148

Wiring and Connector Diagrams

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BODY ELECTRICAL SYSTEM

Audio System

BE–203

BE–204

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BODY ELECTRICAL SYSTEM

Audio System

Wiring and Connector Diagrams

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BODY ELECTRICAL SYSTEM

Audio System

BE–205

Parts Inspection
(Power Switch)
REMOVAL AND INSTALLATION OF
POWER SWITCH

1.

REMOVAL CONTROL PANEL
(a) Remove the console upper panel.

(See BO section)

(b) Remove three screws and the control panel.

2.

INSTALL CONTROL PANEL
For installation, follow the removal procedure in reverse.

INSPECTION OF POWER SWITCH

INSPECT POWER SWITCH

(Continuity)
Inspect continuity between terminals.

Terminal

Switch position

OFF (Power switch released)

ON (Power switch pushed in)

If continuity is not as specified, replace the control panel.

(Resistance)
Inspect resistance between terminals.

Tester connection

Condition

Specified value

11–13

Constant

Approx. 50 k

11–14

Switch knob

A

B

Approx. 0

50 k

If resistance is not as specified, replace the control panel.

(Illumination)
Connect the positive (+) lead from the battery to terminal 2
and the negative (–) lead to terminal 1, check that the illu-
mination light lights up.
If the illumination light does not light up, replace the control
panel.

BE–206

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BODY ELECTRICAL SYSTEM

Audio System