Lexus ES300 (1997 year). Manual - part 122

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.

Z05727

Fuel
Gauge

Battery

BE1206 le–5–1–A

2

1

3

4 5

N21310

A

B

C

N20811

1

2

3

F

E

1/2

Z05730

Warning Light

Ignition
Switch

Battery

BE1217 le–5–1–A

1 2 3

4 5

N20812

1

3

BE–96

–

BODY ELECTRICAL

COMBINATION METER

1480

1997 LEXUS ES300   (RM511U)

(c)

Connect terminals 2 and 3 on the wire harness side con-
nector through a 3.4–W test bulb.

(d)

Turn the ignition switch ON, check that the bulb lights up
and the receiver gauge needle moves toward ”E” side.

HINT:
Because of the silicon oil in the gauge, it will take a short time
for needle to stabilize.
If operation is not as specified, inspect the receiver gauge resis-
tance.

7.

INSPECT FUEL RECEIVER GAUGE RESISTANCE

Measure the resistance between terminals.

Tester connection

Resistance  (

Ω

)

A – B

Approx. 270.8

A – C

Approx. 91.3

B – C

Approx. 179.5

If resistance value is not as specified, replace the receiver
gauge.

8.

INSPECT FUEL SENDER GAUGE RESISTANCE

Measure the resistance between terminals 2 and 3 for each
float position.

Float position mm (in.)

Resistance (

Ω

)

F: Approx. 91.1 (3.587)

Approx. 3.0

1/2: Approx. 34.2 (1.346)

Approx. 31.7

E: Approx. 30.8 (1.213)

Approx. 110.0

If resistance value is not as specified, replace the sender
gauge.

9.

INSPECT FUEL LEVEL WARNING LIGHT

(a)

Disconnect the connector from the sender gauge.

(b)

Connect terminals 1 and 3 on the wire harness side con-
nector.

(c)

Turn the ignition switch ON, check that the warning light
lights up.

If the warning light does not light up, test the bulb or inspect wire
harness.

10.

INSPECT FUEL LEVEL WARNING SWITCH

(a)

Apply battery positive voltage between terminals 1 and 3
through a 3.4–W test bulb, check that the bulb lights up.

HINT:
It takes a short time for the bulb to light up.

N20813

1

3

N20215

Engine Coolant Temperature Gauge

Ignition
Switch

Battery

Sender
Gauge

Z15788

Engine Coolant Temperature Gauge

Wire Harness Side

Test Bulb
(3.4 W)

Ignition
Switch

Battery

1

N21314

A

C

B

–

BODY ELECTRICAL

COMBINATION METER

BE–97

1481

1997 LEXUS ES300   (RM511U)

(b)

Submerge the switch in fuel, check that the bulb goes out.

If operation is not as specified, replace the sender gauge.

11.

INSPECT ENGINE COOLANT TEMPERATURE RE-
CEIVER GAUGE OPERATION

(a)

Disconnect the connector from the sender gauge.

(b)

Turn the ignition switch ON and check that the receiver
gauge needle indicates COOL.

(c)

Ground terminal on the wire harness side connector
through a 3.4–W test bulb.

(d)

Turn the ignition switch ON, and check that the bulb lights
up and the receiver gauge needle moves to the hot side.

If operation is as specified, replace the sender gauge.
Then recheck the system.
If operation is not as specified, measure the receiver gauge re-
sistance.

12.

INSPECT ENGINE COOLANT TEMPERATURE RE-
CEIVER GAUGE RESISTANCE

Measure the resistance between terminals.

Tester connection

Resistance  (

Ω

)

A – B

Approx. 54.0

A – C

Approx. 175.7

B – C

Approx. 229.7

HINT:
Connect the test leads so that the current from the ohmmeter
can flow according to the above order.
This circuit includes the diode.
If resistance value is not as specified, replace the receiver
gauge.