Lexus ES300 (1997 year). Manual — part 203

BE061–01

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BODY ELECTRICAL

AUDIO SYSTEM

BE–147

1531

1997 LEXUS ES300 (RM511U)

TROUBLESHOOTING

NOTICE:
When replacing the internal mechanism (computer part) of the audio system, be careful that no part
of your body or clothing comes in contact with the terminals of the leads from the IC, etc. of the re-
placement part (spare part).
HINT:
This inspection procedure is a simple troubleshooting which should be carried out on the vehicle during sys-
tem operation and was prepared on the assumption of system component troubles (except for the wires and
connectors, etc.).
Always inspect the trouble taking the following items into consideration.

Open or short circuit of the wire harness

Connector or terminal connection fault

For audio systems with anti–theft system, troubleshooting items marked ( * ) indicate that ”Trou-
bleshooting for ANTI–THEFT SYSTEM” should be carried out first.

Problem

No.

Radio

Radio not operating when power switch turned to ’ON’.

1

Display indicates when power switch turned to ’ON’, but no sound (including

’noise’) is produced.

2

Noise present, but AM – FM not operating.

3

Any speaker does not work.

4

Either AM or FM does not work.

5

Few preset turning bands.

5

Reception poor.

6

Sound quality poor.

7

Preset memory disappears.

8

Tape Player

Cassette tape cannot be inserted.

9

Cassette tape inserts, but no power.

10

Power coming in, but tape player not operating.

11

Any speaker does not work.

12

Sound quality poor.

13

Tape jammed, malfunction with tape speed or auto–reverse.

14

Cassette tape will not eject.

15

CD Player

CD cannot be inserted.

16

CD inserted, but no power.

17

Power coming in, but CD player not operating.

18

Sound jumps.

19

Sound quality poor (Volume faint).

20

Any speaker does not work.

21

CD will not be ejected.

22

Noise

Noise occurs

23

Noise produced by vibration or shock while driving.

24

Noise produced when engine starts.

25

The term ”AM” includes LW,MW and SW, and the term ”FW” includes UKW.

V08418

Turn ignition Key from LOCK position to ACC position.

Troubleshooting for ANTI–THEFT SYSTEM

Display A:

ID Number is set.

Display E:

ANTI–THEFT SYSTEM opera-

tion condition. (ID number input

error 10 times or more.)

Display B

”SEC display disappears after 1

second.

Radio switch ON.

Take to designated radio

service station.

Display B

Display D

Refer to each

malfunction item.

Normal

operation.

Radio switch ON.

Normal operation.

Cancel ID number, refer to each malfunction item.

Yes

No

OK

NG

ANTI–THEFT SYSTEM operation condition. (ID number input error 9 times or less.)

Input ID number to cancel ANTI–THEFT SYSTEM, and check display.

Display A

→

B

Display B

Display E

Display C

→

A

Radio switch ON.

Refer to each

malfunction item.

Take to designated

radio service station.

ANTI–THEFT SYSTEM not can-

celled. (ID number input error 10

times or less.)

Display D

ANTI–THEFT SYSTEM cancelled.

Check audio system again.

Normal operation.

OK

NG

Cancel ID number, refer to each malfunction item.

Liquid Crystal Display (LCD) or VFD for Audio System

Display ”A”

Display ”B”

Display ”C”

Display ”D” Example:

Display ”E”

2 DIN Type

1 DIN Type

Blank

No Illumination

2 DIN Type

1 DIN Type

2 DIN Type

1 DIN Type

Error Times

2 DIN Type

1 DIN Type

Radio Display

1 DIN Type

2 DIN Type

HINT:

Refer to Owner’s Manual for operation details of ANTI–THEFT SYSTEM.

When the ID number has been cancelled, reset the same number after completing the operation, or

inform the customer that it has been cancelled.

BE–148

–

BODY ELECTRICAL

AUDIO SYSTEM

1532

1997 LEXUS ES300 (RM511U)

V08480

1

Radio

RADIO NOT OPERATING WHEN POWER SWITCH TURNED TO ”ON”

+ B wire harness faulty.

GND faulty.

Power amplifier or wire harness faulty.

Power amplifier or wire harness faulty.

GND faulty.

Check if GND (wire harness side) to power amplifier is OK?

Is tape player operating normally?

Check if RAD–No.2 fuse is OK?

Is ACC applied to power amplifier?

Is + B applied to power amplifier?

Yes

NG

No

OK

No

No

No

No

OK

OK

OK

Yes

Yes

Yes

Yes

NG

NG

NG

Check if RAD–No.1 fuse is OK?

Is + B applied to radio assembly?

Radio assembly faulty.

Replace fuse.

ACC wire harness faulty.

Is ACC applied to radio assembly?

Check if GND (wire harness side) to radio assembly is OK?

Radio assembly faulty.

Replace fuse.

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BODY ELECTRICAL

AUDIO SYSTEM

BE–149

1533

1997 LEXUS ES300 (RM511U)

*

V08481

2

Radio

DISPLAY INDICATES WHEN POWER SWITCH TURNED TO
”ON”, BUT NO SOUND (INCLUDING ”NOISE”) IS PRODUCED

+ B wire harness faulty.

GND faulty.

Power amplifier faulty.

Speaker wire harness faulty.

GND faulty.

Check if GND (wire harness side) to power amplifier is OK?

Is tape player operating normally?

Check if RAD–No.2 fuse is OK?

Is ACC applied to power amplifier?

Is + B applied to power amplifier?

Yes

NG

No

OK

No

No

No

No

OK

OK

OK

Yes

Yes

Yes

Yes

NG

NG

NG

Check if RAD–No.1 fuse is OK?

Is + B applied to radio assembly?

Radio assembly faulty. Recheck system after repair.

Replace fuse.

ACC wire harness faulty.

Is ACC applied to radio assembly?

Check if GND (wire harness side) to radio assembly is OK?

Radio assembly faulty.

Replace fuse.

Is there continuity in speaker wire harness?

Temporarily install another speaker. Functions OK?

Hiss noise from speaker?

Yes

Yes

No

No

No

Yes

Power amplifier faulty.

Power amplifier faulty.
Recheck system after repair.

Speaker faulty.

BE–150

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BODY ELECTRICAL

AUDIO SYSTEM

1534

1997 LEXUS ES300 (RM511U)