Lexus ES300 (1997 year). Manual - part 260

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

)

N21211

4

6

N21539

1 2 3

4 5 6

h–6–1

Wire Harness Side

BE4029

Tester Probe

Tin Foil

Heat Wire

–

BODY ELECTRICAL

DEFOGGER SYSTEM

BE–107

1491

1997 LEXUS ES300   (RM511U)

5.

INSPECT MIRROR DEFOGGER OPERATION

(a)

Connect the positive (+) lead from the battery to terminal
6 and the negative (–) lead to terminal 4.

(b)

Check that the mirror becomes warm.

HINT:
It will take a short time for the mirror to become warm.
If the mirror does not become warm, replace the mirror assem-
bly.

6.

INSPECT MIRROR DEFOGGER CIRCUIT

Disconnect the connector from the outside mirror and inspect
the connector on the wire harness side.

Tester connection

Condition

Specified condition

4 – Ground

Constant

Continuity

6 – Ground

Ignition switch position ON

(Defogger switch OFF)

No voltage

6 – Ground

Ignition switch position ON

(Defogger switch ON)

Battery positive voltage

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

7.

INSPECT DEFOGGER WIRE

NOTICE:

When cleaning the glass, use a soft, dry cloth, and
wipe the glass in the direction of the wire. Take care
not to damage the wires.

Do not use detergents or glass cleaners with abrasive
ingredients.

When measuring voltage, wind a piece of tin foil
around the top of the negative probe and press the foil
against the wire with your finger, as shown.

(a)

Turn the ignition switch ON.

(b)

Turn the defogger switch ON.