Lexus ES300 (1997 year). Service manual - part 140

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.

BE065–01

BE–168

–

BODY ELECTRICAL

ANTENNA CORD

1552

1997 LEXUS ES300   (RM511U)

INSTALLATION

Installation is in the reverse order of removal (See page 

BE–167

).

BE066–01

Z04388

E

ILL

B

ACC

2

3

1

Ground

Power Source

(Illumination)

Power Source

Power Source

(Display Operation)

Connector

(Clock Side)

(Wire Harness Side)

1

4

4

3 2 1

2 3 4

(System Operation)

I01417

1

CLOCK WILL NOT OPERATE

(Clock Side)

(Wire Harness Side)

Is there battery voltage between terminal
+B and body ground?

Open or short circuit in wire harness between
terminal +B and DOME fuse.

Open circuit in wire harness between
terminal GND and body ground.

+B

GND

Does continuity exist between terminal
GND and body ground?

Replace clock.

Yes

No

1

4 3 2 1

2 3 4

No

Yes

(a)    Check that the battery positive voltage is 10 –14 V.

If voltage is not as specified, replace the battery.

(b)    Check that the DOME fuse is not blown.

If the fuse is blown, replace the fuse and check for short
circuit.

(c)    Troubleshoot the clock as follows.

HINT: 
Inspect the connector on the wire harness side.

–

BODY ELECTRICAL

CLOCK

BE–169

1553

1997 LEXUS ES300   (RM511U)

CLOCK

TROUBLESHOOTING

HINT:
Troubleshoot the clock according to the table below.

Clock will not operate

1

Clock loses or gains time

2

± 

1.5 seconds / day