Lexus ES300 (1997 year). Service manual — part 275

BE062–01

Z19355

Tweeter

Ignition Switch

Power Amplifier

Tweeter

Instrument Panel Junction Block

RADIO No.1 Fuse

RAD No.2 Fuse

Radio Receiver Assembly

Woofer

CD Auto Changer

Front Speaker

Rear Speaker

BE–164

–

BODY ELECTRICAL

AUDIO SYSTEM

1548

1997 LEXUS ES300 (RM511U)

LOCATION

BE063–01

N21369

Wire Harness Side

N21370

Wire Harness Side

Connector ”A”

Connector ”B”

Connector ”C”

–

BODY ELECTRICAL

AUDIO SYSTEM

BE–165

1549

1997 LEXUS ES300 (RM511U)

INSPECTION

1.

INSPECT CD AUTO CHANGER CIRCUIT

Disconnect connectors from CD auto changer and inspect the
connector on the wire harness side.

Tester connection

Condition

Specified condition

8 – Ground

Constant

Continuity

5 – Ground

Constant

Battery positive voltage

12 – Ground

Ignition switch LOCK

No voltage

12 – Ground

Ignition switch ACC or ON

Battery positive voltage

If the circuit is not as specified, inspect the circuits connected
to other parts.
HINT:

Check the wire harness between the radio receiver as-
sembly and the CD auto changer.

Since the signals to and from the MUTE, R

–

, R

+

, L

–

, L

+

,

TX

–

and TX

+

terminals are serial signals, they cannot or-

dinarily be measured with a tester.

2.

INSPECT POWER AMPLIFIER CIRCUIT

Disconnect the connector from power amplifier and inspect the
connector on the wire harness side.

Tester connection

Condition

Specified condition

C7 – Ground

Constant

Continuity

C3 – Ground

Ignition switch LOCK

No voltage

C3 – Ground

Ignition switch ACC or ON

Battery positive voltage

C4 – Ground

Constant

Battery positive voltage

If the circuit is not as specified, inspect the circuits connected
to other parts.

Z05935

Wire Harness Side

Connector ”A”

Connector ”B”

BE6542 e–12–1

BE–166

–

BODY ELECTRICAL

AUDIO SYSTEM

1550

1997 LEXUS ES300 (RM511U)

3.

INSPECT RADIO RECEIVER ASSEMBLY CIRCUIT

Disconnect the connectors from the radio receiver assembly,
and inspect the connector on the wire harness side.

Tester connection

Condition

Specified condition

A4 – Ground

Constant

Battery positive voltage

A3 – Ground

Ignition switch LOCK

No voltage

A3 – Ground

Ignition switch ACC or ON

Battery positive voltage

If the circuit is not as specified, inspect the circuits connected
to other parts.
HINT:
Check the wire harness between radio receiver assembly and
the CD auto changer, between radio receiver assembly and
power amplifier.
4.

INSPECT GLASS IN PRINTED ANTENNA

(Use same procedure as for ”INSPECT DEFOGGER WIRES”
on page BE–126.)
5.

REPAIR GLASS PRINTED ANTENNA

(Use same procedure as for ”REPAIR DEFOGGER WIRES” on
page BE–127.)

N21504

BE064–01

–

BODY ELECTRICAL

ANTENNA CORD

BE–167

1551

1997 LEXUS ES300 (RM511U)

ANTENNA CORD

REMOVAL

REMOVE ANTENNA CORD

(a)

Remove the following parts:

Instrument panel assembly

Console box

Rear seat

Right rear poller garnish

Package tray trim

Room partition trim

HINT:
See BO section
(b)

Remove antenna cord from glass printed antenna.

(c)

Disconnect the connectors shown in the illustration.

(d)

Remove the clips and antenna cord assembly.