Lexus RX300 (MCU15). Service manual — part 149

BE2820

Multipath

BE2821

Fade Out

N17398

Example :

Head

Capstan

Pinch Roller

BE4331

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BODY ELECTRICAL

AUDIO SYSTEM (Europe)

BE–143

LEXUS RX300 (RM785E)

S

Multipath
One type of interference caused by bouncing of ra-
dio waves off obstructions is called ”multipath”. Mul-
tipath occurs when a signal from the broadcast
transmitter antenna bounces off buildings and
mountains and interferes with the signal that is re-
ceived directly.

S

Fade Out
Because FM radio waves are of higher frequencies
than AM radio waves, they bounce off buildings,
mountains, and other obstructions. For this reason,
FM signals often seem to gradually disappear or
fade away as the vehicle goes behind a building or
other obstructions. This is called ”fade out”.

4.

Tape Player/Head Cleaning:
MAINTENANCE

(a)

Raise the cassette door with your finger.
Next, using a pencil or similar object, push in the guide.

(b)

Using a cleaning pen or cotton applicator soaked in clean-
er, clean the head surface, pinch rollers and capstans.

5.

CD Player/Disc Cleaning:
MAINTENANCE

If the disc gets dirty, clean the disc by wiping the surface from
the center to outside in the radial directions with a soft cloth.
NOTICE:
Do not use a conventional record cleaner or anti–static pre-
servative.

BE1VI–02

I17103

Audio system normal operation

to 2. SYSTEM CHECK MODE SCREEN

to 4. DISPLAY
CHECK MODE SCREEN

Diagnosis start–up. (refer to next page)

HINT:
When Diagnosis Sys-
tem mode is started,
system check is per-
formed at first and the
check result is dis-
played.

BE–144

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BODY ELECTRICAL

AUDIO SYSTEM (Europe)

LEXUS RX300 (RM785E)

TROUBLESHOOTING

1.

DIAGNOSIS SYSTEM MODE (w/o Navigation system)

HINT:
Diagnosis System Mode is operated as follows.
In case of a vehicle without navigation system, there is no navigation check mode. However, other modes
except for this are same as a vehicle with navigation system.

I19230

LHD:

RHD:

I17110

Concealed
touch
switch

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BODY ELECTRICAL

AUDIO SYSTEM (Europe)

BE–145

LEXUS RX300 (RM785E)

(a)

DIAGNOSIS START–UP
To start the diagnosis menu, there are 2 ways: using a
diagnosis check wire and using a switch.

(b)

START–UP BY SWITCH OPERATION
(1)

Vehicle speed is 0 km/h (0 mph).

(2)

Parking brake switch is pressed.

(3)

Press the Display switch to display the Screen Ad-
justment screen.

(4)

Repeatedly touch the upper and lower bottom parts
of the left end of the screen 3 times.

(c)

FINISHING DIAGNOSIS SYSTEM MODE
Turn the ignition switch from ACC to OFF to finish the
mode. If it is started by switch operation.

2.

DIAGNOSIS SYSTEM MODE (w/ Navigation system)
(See page DI–726)

BE1VJ–02

I19176

Engie Room J/B
D DOME Fuse
D RAD No. 1 Fuse

Tweeter

CD Auto Changer

Ignition Switch

Front Speaker

Auto Antenna

Center Cluster Integration
Panel
D Radio Assembly

Instrument Panel J/B
D RAD No. 2 Fuse

Rear Speaker

Power Amplifier

BE–146

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BODY ELECTRICAL

AUDIO SYSTEM (Europe)

LEXUS RX300 (RM785E)

LOCATION