Lexus RX300 (MCU15). Service manual — part 390

DI–790

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DIAGNOSTICS

LEXUS NAVIGATION SYSTEM

LEXUS RX300 (RM785E)

22. Radio reception poor.

INSPECTION PROCEDURE

1

Check the reception. (Select an AM or FM station band which signals are strong)

Yes

An electric wave environment is bad.

No

2

Are there any additional installation parts? (Telephone antenna, etc.)

Yes

Does the condition get better if removing them?
Influence of additional installation parts.

No

3

Is the contact of the plug jack of the radio OK?

NG

Take a measure for contact.

OK

Is the antenna cord caught or broken?

DI7PF–02

–

DIAGNOSTICS

LEXUS NAVIGATION SYSTEM

DI–791

LEXUS RX300 (RM785E)

23. Cassette tape cannot be inserted.

INSPECTION PROCEDURE

1

Is there a foreign object inside tape player?

Yes

Remove foreign object.

No

2

Is auto search button radio operating normally?

NG

Radio assembly faulty.

OK

3

Check the cassette tape for deformation or peeling–off of the label.

NG

Replace cassette.

OK

4

Is the tape slack?

NG

Remove slack before using.

OK

Replace the radio receiver assembly.

DI7PG–02

DI–792

–

DIAGNOSTICS

LEXUS NAVIGATION SYSTEM

LEXUS RX300 (RM785E)

24. Cassette tape cannot be eject.

INSPECTION PROCEDURE

1

Check if RADIO No. 2 or DOME fuse is OK?

NG

Replace fuse.

OK

2

Is not the cassette tape caught on the cluster panel?

YES

Remove the cassette tape.

NO

3

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

DI7PH–03

–

DIAGNOSTICS

LEXUS NAVIGATION SYSTEM

DI–793

LEXUS RX300 (RM785E)

NG

Replace or repair wire harness.

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

OK

Replace the radio receiver assembly.