Lexus ES300 (1997 year). Service manual — part 255

V08453

Disconnect connector ”C” from meter.
Inspect connector on wire harness side as follows.

HINT : While carrying out the following inspection, make certain that the connectors and terminals are properly con-
nected.

Yes

32

Ground terminal B7 and turn light control switch to
HEAD. Does headlight indicator light up?

Is bulb OK?

Replace circuit plate.

No

Abnormal operation or indicator
does not light up.

HEADLIGHT INDICATOR

Turn light control switch to HEAD.
Do headlights light up?

Inspect headlight and taillight system.
(See page

BE–27

).

Is there battery positive voltage (0 V

↔

battery

positive voltage) between following terminals with

light control switch HEAD?

C5 and ground.

Connect connector ”A” to meter.

Disconnect connector ”B” from meter.

Inspect connector on combination meter side as

follows.

Open circuit in wire harness between terminal

B7 of meter and ground.

Ground faulty.

Temporarily install another circuit plate.
Is operation normal?

Replace bulb.
Then recheck system.

Replace combination
meter computer.
Then recheck system.

No

Yes

Yes

Yes

Yes

No

No

No

COMBINATION
METER

Wire harness faulty between meter and:

Light control switch

HEAD Fuse

Headlight control relay

BE–84

–

BODY ELECTRICAL

COMBINATION METER

1468

1997 LEXUS ES300 (RM511U)

BE05E–01

Z18765

Engine Room
Junction Block

DOME Fuse

ECU–B Fuse

HEAD (LH) Fuse

HEAD (RH) Fuse

Engine Oil Level Sensor

Washer Level Warning Switch

Washer Tank

Brake Fluid Level
Waming Switch

ECM

ABS ECU or
ABS and Traction ECU

O/D OFF Switch

Combination Meter

Meter Circuit

Bulb Check Relay

Light Control
Rheostat

Instrument Panel
Junction Block

GAUGE Fuse

IGN Fuse

Seat Belt Buckle Switch

Airbag Sensor Assembly

–

BODY ELECTRICAL

COMBINATION METER

BE–85

1469

1997 LEXUS ES300 (RM511U)

LOCATION

Z18766

Fuel Sender Gauge

1

Light Failure Sensor

Fuel Tank

2

3

4

1: Engine Coolant Temperature Sender Gauge
2: Low Oil Pressure Switch
3: Park/Neutral Position Switch
4: Vehicle Speed Sensor

BE–86

–

BODY ELECTRICAL

COMBINATION METER

1470

1997 LEXUS ES300 (RM511U)

BE05F–05

I01951

Fuel Sender Gauge

Ground (Signal)

Engine Coolant Temperature

Fuel Sender Gauge

Ground (Engine)

Sender Gauge

Fuel Level Warning

D11

D12

D13

A1

A3

A13

EFI

H1E

H1D

B15

C9

D4

SE

SI

Vehicle Speed Sensor

Ground (Power)

Headlight Dimmer Switch

Generator L Terminal

Light Failure Sensor

C5

A10

A7

C7

Discharge Warning

Rear Lights Warning

ECU

Odometer

To +B

P

Engine Oil Level Warning

DELAY

R
N
D
2

L

High Beam Indicator

Right Turn Indicator

A9

D10

B3

D5

A8

D7

B4

D6

A4

B5

C6

D9

Engine Oil Level Sensor

Brake Fluid Level Warning Switch

Parking Brake Switch

Washer Level Warning Switch

Low Oil Pressure Warning Switch

EFI ECU

Seat Belt Relay

ABS ECU

TRAC

TRAC OFF

Cruise Control ECU

Brake Warning

Washer Level Warning

Low Oil Pressure Warning

Malfunction Indicator

Seat Belt Warning

ABS Warning

TRAC Warning

TRAC OFF Indicator

CRUISE CONTROL Indicator

Left Turn Indicator

Bulb Check Relay

Headlight Indicator

O/D OFF Switch

Door Courtesy Switch

Airbag ECU

O/D OFF Indicator

Rheostat Light Control Volume

D1

D2

SRS Warning

Taillight Indicator

Open Door Warning

A/C ECU

Park/Neutral Position Switch

To GAUGE Fuse

To IGN Fuse

To HEAD Fuse

C10

B12

B14
C1
C2
B10
B9

D3

B2

C3

B13

B11

B16

B7

Turn
Signal
Switch

Starter Relay

B8

C8

D8

Taillight Relay

P
R
N

D

2
L

FUEL

TEMP

TACH

SPEED

To DOME Fuse

To ECU–B Fuse

–

BODY ELECTRICAL

COMBINATION METER

BE–87

1471

1997 LEXUS ES300 (RM511U)

CIRCUIT

1.

WIRING DIAGRAM