Lexus ES300 (1997 year). Manual - part 257

BE05I–03

N20924

Connector ”A”

Connector ”B”

Connector ”C”

Connector ”D”

J–13–1–A

J–16–I

J–10–I
J–13–1

1

2

3

4

5

6

7

1

2

3

4

5

6

7

8

10 11 12 13

9

8

10 11 12 13

9

14 15 16

1

2

3

4

5 6

7 8

9 10

1

2

3

4

5

6

7

8

9 10 11 12 13

BE–92

–

BODY ELECTRICAL

COMBINATION METER

1476

1997 LEXUS ES300   (RM511U)

INSPECTION

1.

INSPECT COMBINATION METER WIRING CIRCUIT

Disconnect the connector ”A”, connector ”B”, connector ”C” and
connector ”D” from the combination meter and inspect the con-
nectors on the wire harness side.

Park/Neutral Position Switch:

Tester  connection

Condition

Specified  condition

B12 – Ground

Ignition switch ON and shift lever position ”P”

Battery positive voltage

B14 – Ground

Ignition switch ON and shift lever position ”R”

Battery positive voltage

C1 – Ground

Ignition switch ON and shift lever position ”N”

Battery positive voltage

C2 – Ground

Ignition switch ON and shift lever position ”D”

Battery positive voltage

B10 – Ground

Ignition switch ON and shift lever position ”2”

Battery positive voltage

B9 – Ground

Ignition switch ON and shift lever position ”L”

Battery positive voltage

Turn Signal Switch and Hazard Warning Switch:

Tester  connection

Condition

Specified  condition

B13 – Ground

Hazard warning switch ON

Battery positive voltage 

↔

 0V

B13 – Ground

Ignition switch ON and turn signal switch to

”Right”

Battery positive voltage 

↔

 0V

B11 – Ground

Hazard warning switch ON

Battery positive voltage 

↔

 0V

B11 – Ground

Ignition switch ON and turn signal switch to

”Left”

Battery positive voltage 

↔

 0V

Headlight:

Tester  connection

Condition

Specified  condition

C3 – C5

Light control switch ”HEAD”

(Dimmer switch ”LO”)

No voltage

C3 – C5

Light control switch ”HEAD”

(Dimmer switch ”HI” or ”Flash”)

Battery positive voltage

GAUGE Fuse:

Tester  connection

Condition

Specified  condition

D3 – Ground

Ignition switch position ACC, START

No voltage

D3 – Ground

Ignition switch position ON

Battery positive voltage

–

BODY ELECTRICAL

COMBINATION METER

BE–93

1477

1997 LEXUS ES300   (RM511U)

IGN Fuse:

Tester  connection

Condition

Specified  condition

B2 – Ground

*

2

 Ignition switch position LOCK, ACC,

START

No voltage

B2 – Ground

*

2

 Ignition switch position ON

Battery positive voltage

Fuel Sender Gauge:

Tester  connection

Condition

Specified  condition

D12 – D13

Float position Full, Approx. 91.1 mm

(3.587 in.)

Approx. 4.6V

D12 – D13

Float position 1/2, Approx. 34.2 mm

(1.346 in.)

Approx. 2.4V

D12 – D13

Float position Empty, Approx. 30.8 mm

(1.213 in.)

Approx. 0.3V

D11 – D12

Ignition switch ON

Approx. 5V

Ground (Signal):

Tester  connection

Condition

Specified  condition

D13 – Ground

Constant

Continuity

Ground (Engine):

Tester  connection

Condition

Specified  condition

A1 – Ground

Constant

Continuity

Ground (Power):

Tester  connection

Condition

Specified  condition

B15 – Ground

Constant

Continuity

Generator ”L” Terminal:

Tester  connection

Condition

Specified  condition

A10 – Ground

Engine stop

Continuity

A10 – Ground

Engine running

Battery positive voltage

Engine Oil Level Warning Switch:

Tester  connection

Condition

Specified  condition

C7 – Ground

Oil temperature above approx. 55 

°

C

(131 

°

F) and switch position OFF (float down)

No continuity

C7 – Ground

Oil temperature below approx. 55 

°

C

(131 

°

F)

Continuity

C7 – Ground

Oil temperature above approx. 55 

°

C

(131 

°

F) and switch position ON (float up)

Continuity

DOME fuse:

Tester  connection

Condition

Specified  condition

C8 – Ground

Constant

Battery positive voltage

Rheostat Light Control:

Tester  connection

Condition

Specified  condition

D1 – Ground

Light control switch TAIL or HEAD and

turn rheostat volume knob.

Voltage changes no voltage or voltage

fluctuates

*

2

 Shift lever position is ”N” or ”P” position.

If circuit is not as specified, refer to BE–60 wiring diagram and inspect the circuit connected to other parts.

N02332

3

2

1

BE–94

–

BODY ELECTRICAL

COMBINATION METER

1478

1997 LEXUS ES300   (RM511U)

2.

INSPECT SPEEDOMETER ON–VEHICLE

Using a speedometer tester, inspect the speedometer for allow-
able indication error and check the operation of the odometer.
HINT:
Tire wear and tire over or under inflation will increase the indica-
tion error.
If error is excessive, replace the speedometer.

USA (mph)

CANADA (km/h)

Standard  indication

Allowable  range

Standard  indication

Allowable  range

      20

18 – 24

      20

17 – 24

      40

38 – 44

      40

38 – 46

      60

56 – 66

      60

57.5 – 67

      80

78 – 88

      80

77 – 88

      100

98 – 110

      100

96 – 109

      120

118 – 132

      120

115 – 130

      140

134 – 151.5

      160

153 – 173

3.

INSPECT VEHICLE SPEED SENSOR OPERATION

(a)

Connect the positive (+) lead from the battery to terminal
1 and negative (–) lead to terminal 2.

(b)

Connect the positive (+) lead from the tester to terminal
3 and the negative (–) lead to terminal 2.

(c)

Rotate the shaft.

(d)

Check that there is voltage change from approx. 0 V to 11
V or more between terminals 2 and 3.

HINT:
The voltage change should be performed 4 times for every rev-
olution of the speed sensor shaft.
If operation is not as specified, replace the sensor.

Z07420

Wire Harness Side

1

le–3–1–G

2 3

N20810

Battery

Ignition
Switch

Fuel Gauge

–

BODY ELECTRICAL

COMBINATION METER

BE–95

1479

1997 LEXUS ES300   (RM511U)

4.

INSPECT VEHICLE SPEED SENSOR CIRCUIT

Disconnect the connector from sensor and inspect the connec-
tor on wire harness side, as shown.

Tester  connection

Condition

Specified  condition

1 – Ground

Ignition switch LOCK or ACC

No voltage

1 – Ground

Ignition switch ON

Battery positive voltage

If circuit is not as specified, inspect power source or wire har-
ness.

5.

INSPECT TACHOMETER ON–VEHICLE

(a)

Connect a tune–up test tachometer, and start the engine.

NOTICE:

Reversing the connection of the tachometer will dam-
age the transistors and diodes inside.

When removing or installing the tachometer, be care-
ful not to drop or subject it to heavy shocks.

(b)

Compare the tester and tachometer readings.
DC 13.5 V 25 

°

C at (77

°

F)

Standard  indication

Allowable  range

700

630 – 770

1,000

900 – 1,100

2,000

1,850 – 2,150

3,000

2,800 – 3,200

4,000

3,800 – 4,200

5,000

4,800 – 5,200

6,000

5,750 – 6,250

7,000

6,700 – 7,300

6.

INSPECT FUEL RECEIVER GAUGE OPERATION

(a)

Disconnect the connector from the sender gauge.

(b)

Turn the ignition switch ON, check that the receiver gauge
needle indicates EMPTY.