Lexus RX300 (MCU15). Service manual — part 391

DI–794

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DIAGNOSTICS

LEXUS NAVIGATION SYSTEM

LEXUS RX300 (RM785E)

25. CD magazine cannot be inserted.

INSPECTION PROCEDURE

1

Is CD magazine already inserted?

YES

Eject CD magazine.

NO

2

Check the CD auto changer assembly.

PREPARATION:
Disconnect the CD auto changer assembly connector.
CHECK:
Check voltage terminals +B.
OK:

+B: 10 – 14 V

CHECK:
Check voltage terminal ACC when turn ignition switch ACC or ON position.
OK:

ACC: 10 – 14 V

CHECK:
Check continuity terminal GND.
OK:

GND: Continuity

NG

Replace or repair wire harness.

OK

Replace the CD auto changer assembly.

HINT:
When sending it for repair, leave as it is without attempting to take it out by force.

DI7PI–03

–

DIAGNOSTICS

LEXUS NAVIGATION SYSTEM

DI–795

LEXUS RX300 (RM785E)

26. CD magazine cannot be eject.

INSPECTION PROCEDURE

1

Check if RADIO No. 1 fuse is OK?

NG

Replace fuse.

OK

2

Check the CD auto changer assembly.

PREPARATION:
Disconnect the CD auto changer assembly connector.
CHECK:
Check voltage terminals +B.
OK:

+B: 10 – 14 V

CHECK:
Check voltage terminal ACC when turn ignition switch ACC or ON position.
OK:

ACC: 10 – 14 V

CHECK:
Check continuity terminal GND.
OK:

GND: Continuity

NG

Replace or repair wire harness.

OK

Replace or repair the CD auto changer assembly.

HINT:
When sending it for repair, leave as it is without attempting to take it out by force.

DI7PJ–03

DI–796

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DIAGNOSTICS

LEXUS NAVIGATION SYSTEM

LEXUS RX300 (RM785E)

27. No AM, FM or CD screen is displayed.

INSPECTION PROCEDURE

1

Check the sound. (Check if the sound of the radio, cassette or CD can be heard.)

OK

System check mode. (Check radio receiver as-
sembly)

NG

2

Check the radio receiver assembly.

PREPARATION:
Disconnect the radio receiver assembly connector.
CHECK:
Check voltage terminals +B.
OK:

+B: 10 – 14 V

CHECK:
Check voltage terminal ACC when turn ignition switch ACC or ON position.
OK:

ACC: 10 – 14 V

CHECK:
Check continuity terminal GND.
OK:

GND: Continuity

NG

Replace or repair wire harness.

OK

DI7PK–03

–

DIAGNOSTICS

LEXUS NAVIGATION SYSTEM

DI–797

LEXUS RX300 (RM785E)

3

Check ”AVC–LAN communication circuit” (See page DI–798).

NG

Replace or repair AVC–LAN circuit.

OK

Replace the radio receiver assembly.