Lexus ES300 (1997 year). Manual - part 192

Z13912

Above 60

°

C

(140

°

F)

2

OFF

1

ON

Z05733

Wire Harness Side

1 2

ls–2–1–D

I03031

Ignition
Switch

Battery

Warning Light

1 2

Z09972

(a)

(b)

A

B

C

A

C

B

–

BODY ELECTRICAL

COMBINATION METER

BE–103

1487

1997 LEXUS ES300   (RM511U)

(c)

Check that continuity exists between terminals with the
switch ON (float up).

(d)

Check that no continuity exists between terminals with the
switch OFF (float down).

If operation is not as specified, replace the switch.

31.

INSPECT ENGINE OIL LEVEL WARNING SWITCH CIR-
CUIT

Disconnect the switch connector and inspect the connector on
wire harness side.

Tester  connection

Condition

Specified  condition

2 – Ground

Constant

Continuity

If continuity is not as specified, inspect the wire harness or
ground point.

32.

INSPECT ENGINE OIL LEVEL WARNING LIGHT

(a)

Disconnect the connector from the switch.

(b)

Turn the IG switch ON, the warning light lights up.

(c)

The warning light lights up after 40 sec. from the engine
has started.

If the warning light does not light up, inspect bulb or wire har-
ness.
33.

INSPECT LIGHT CONTROL RHEOSTAT
(See page 

BE–43

)

34.

INSPECT BULB CHECK RELAY OPERATION

(a)

Connect the positive (+) lead from the battery to terminal
C through a 1.4–W test bulb and the negative (–) lead to
terminal B, check that the test bulb does not light up.

(b)

Connect the positive (+) lead from the battery to terminal
A and check that the test bulb lights up.

If operation is not as specified, replace the relay.

BE05J–01

BE–104

–

BODY ELECTRICAL

COMBINATION METER

1488

1997 LEXUS ES300   (RM511U)

REASSEMBLY

Reassembly is in the reverse of the disassembly(See page 

BE–90

).

Z19374

A/C Control Panel
Assembly

 A/C Control Panel

 A/C Amplifier

Ignition Switch

Instrument Panel Junction Block

 DEF Fuse

 HEATER Fuse

 MIRROR HEATER Fuse

 Defogger Relay

RH Mirror

 Mirror Defogger

Defogger Wire

LH Mirror

 Mirror Defogger

BE05K–04

–

BODY ELECTRICAL

DEFOGGER SYSTEM

BE–105

1489

1997 LEXUS ES300   (RM511U)

DEFOGGER SYSTEM

LOCATION

BE05L–03

N21536

29

36

30

N21537

29

36

30

ON

N21538

Wire Harness Side

17 18 19 20 21 22 23 24 25 26 27 28 29

30 31 32 33 34 35 36 37 38 39 40 41 42

N14863

1

2

5

3

3

5

2

1

BE–106

–

BODY ELECTRICAL

DEFOGGER SYSTEM

1490

1997 LEXUS ES300   (RM511U)

INSPECTION

1.

A/C control panel assembly:
INSPECT DEFOGGER SWITCH OPERATION

(a)

Connect the positive (+) lead from the battery to terminal
29 and negative (–) lead to terminal 30.

(b)

Connect the positive (+) lead from the battery to terminal
36 through a 1.4 W test bulb.

(c)

Turn the defogger switch ON and check that the test bulb
and indicator light turn ON, then turn OFF after approx. 15
minutes.

If operation is not as specified, proceed to inspect the A/C con-
trol assembly.
(See page 

AC–105

)

2.

INSPECT DEFOGGER SWITCH CIRCUIT

Disconnect the connector from the switch and inspect the con-
nector on wire harness side.

Tester connection

Condition

Specified condition

30 – Ground

Constant

Continuity

29 – Ground

Ignition switch position ACC or LOCK

No voltage

29 – Ground

Ignition switch position ON

Battery positive voltage

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

3.

INSPECT DEFOGGER RELAY CONTINUITY

Condition

Tester connection

Specified condition

Constant

1 – 2

Continuity

Apply B+ between

terminals 1 and 2.

3 – 5

Continuity

If continuity is not as specified, replace the relay.
4.

INSPECT DEFOGGER RELAY CIRCUIT
(See page 

BE–11

)