Lexus ES300 (1997 year). Manual - part 102

Z18767

BE–14

–

BODY ELECTRICAL

POWER SOURCE

1398

1997 LEXUS ES300   (RM511U)

4.

INSPECT INSTRUMENT PANEL JUNCTION BLOCK
CIRCUIT

–

BODY ELECTRICAL

POWER SOURCE

BE–15

1399

1997 LEXUS ES300   (RM511U)

(a)

Remove the fuse from the instrument panel junction block
and inspect the connector on instrument panel junction
block side.

Fuse

Tester  connection

Condition

Specified  condition

S – HTR

2 – Ground

Ignition switch turned to ON

Battery positive voltage

HEATER

3 – Ground

Ignition switch turned to ON

Battery positive voltage

GAUGE

6 – Ground

Ignition switch turned to ON

Battery positive voltage

WIPER

7 – Ground

Ignition switch turned to ON

Battery positive voltage

M – HTR

10 – Ground

Ignition switch turned to ON

Battery positive voltage

ECU – IG

11 – Ground

Ignition switch turned to ON

Battery positive voltage

IGN

14 – Ground

Ignition switch turned to ON

Battery positive voltage

STOP

16 – Ground

Constant

Battery positive voltage

TAIL

18 – Ground

Light control switch turned to TAIL

or HEAD and Engine running

Battery positive voltage

PWR

22 – Ground

Ignition switch turned to ON

Battery positive voltage

OBD – 2

24 – Ground

Constant

Battery positive voltage

FOG

26 – Ground

Constant

Battery positive voltage

ST

28 – Ground

Constant

Battery positive voltage

DOOR

29 – Ground

Constant

Battery positive voltage

PANEL

31 – Ground

Constant

Battery positive voltage

TURN

33 – Ground

Ignition switch turned to ON

Battery positive voltage

RAD/2

35 – Ground

Ignition switch turned to ACC or ON

Battery positive voltage

CIG

38 – Ground

Ignition switch turned to ACC or ON

Battery positive voltage

DEF

39 – Ground

Constant

Battery positive voltage

POWER

41 – Ground

Constant

Battery positive voltage

AM1

44 – Ground

Constant

Battery positive voltage

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

Remove the relay from the junction block and inspect in-
spect the connector on junction block side.

Relay

Tester  connection

Condition

Specified  condition

Taillight

B – Ground

Constant

Battery positive voltage

Taillight

D – Ground

Constant

Battery positive voltage

Defogger

F – Ground

Constant

Battery positive voltage

Defogger

G – Ground

Defogger switch ON

Battery positive voltage

Power Main

J – Ground

Constant

Battery positive voltage

Power Main

K – Ground

Constant

Continuity

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

N21307

C D

B

A

F

E

H

G

J L I

M

K

O

N

Q

P

T

U

V

R

S

BE–16

–

BODY ELECTRICAL

POWER SOURCE

1400

1997 LEXUS ES300   (RM511U)

5.

INSPECT INSIDE ENGINE ROOM JUNCTION BLOCK
CIRCUIT

Remove the relay from the relay block and inspect the connec-
tor on relay block side.

Relay

Tester  connection

Condition

Specified  condition

MG/CLT

C – Ground

Constant

Continuity

MG/CLT

D – Ground

Ignition switch turned to ON

Battery positive voltage

C/OPN

G – Ground

Constant

Continuity

FAN No.2

L – Ground

Constant

Continuity

FAN No.2

J – Ground

Ignition switch turned to ON

Battery positive voltage

FAN No.2

K – Ground

Constant

Battery positive voltage

FAN No.3

P – Ground

Constant

Battery positive voltage

HEATER

U – Ground

Constant

Continuity

HEATER

R – Ground

Ignition switch turned to ON

Battery positive voltage

HEATER

V – Ground

Constant

Battery positive voltage

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

N21308

1

2

3

4

–

BODY ELECTRICAL

POWER SOURCE

BE–17

1401

1997 LEXUS ES300   (RM511U)

6.

INSPECT FUSIBLE LINK BLOCK CIRCUIT

Remove the fuse from the junction block and inspect the con-
nector on junction block side.

Fuse

Tester  connection

Condition

Specified  condition

HTR

1 – Ground

Ignition switch turned to ON

Battery positive voltage

ALT

4 – Ground

Constant

Battery positive voltage

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