Lexus ES300 (1997 year). Manual - part 237

N21303

1

4

5

A

B

C

D

E

F

G

H

I

K

J

M

L

2

3

BE–12

–

BODY ELECTRICAL

POWER SOURCE

1396

1997 LEXUS ES300   (RM511U)

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

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

Relay

Tester  connection

Condition

Specified  condition

ST

C – Ground

Constant

Battery positive voltage

HEAD

E – Ground

Constant

Battery positive voltage

HEAD

H – Ground

Constant

Battery positive voltage

EFI

J – Ground

Constant

Continuity

ENGINE MAIN

M – Ground

Constant

Battery positive voltage

ENGINE MAIN

Q – Ground

Ignition switch turned to ON

Battery positive voltage

FAN No.1

U – Ground

Constant

Battery positive voltage

HORN

V – Ground

Constant

Battery positive voltage

HORN

Y – Ground

Constant

Battery positive voltage

If the circuit is not as specified, inspect the circuits connected
to other parts.
2.

CANADA Models Only:
INSPECT ENGINE ROOM No.2 RELAY BLOCK CIR-
CUIT

(a)

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

Fuse

Tester  connection

Condition

Specified  condition

H – LP RH (LO)

2 – Ground

Constant

Battery positive voltage

H – LP LH (LO)

3 – Ground

Constant

Battery positive voltage

DRL No.2

5 – Ground

Constant

Battery positive voltage

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

N21304

F

G

H

I

J

1

2

A

B

C

D

E

–

BODY ELECTRICAL

POWER SOURCE

BE–13

1397

1997 LEXUS ES300   (RM511U)

(b)

Remove the relay from the relay block and inspect the
connector on relay block side.

Relay

Tester  connection

Condition

Specified  condition

DRL No.3

D – Ground

Constant

Continuity

DRL No.3

A – Ground

Constant

Battery positive voltage

DRL No.3

E – Ground

Constant

Battery positive voltage

DRL No.4

H – Ground

Constant

Battery positive voltage

DRL No.4

I – Ground

Constant

Battery positive voltage

DIM

J – Ground

Constant

Battery positive voltage

If the circuit is not as specified, inspect the circuits connected
to other parts.
3.

INSPECT ENGINE ROOM No.3 RELAY BLOCK CIR-
CUIT

(a)

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

Fuse

Tester  connection

Condition

Specified  condition

ABS

2 – 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 relay block and inspect the
connector on relay block side.

Relay

Tester  connection

Condition

Specified  condition

ABS SOL

F – Ground

Constant

Continuity

ABS SOL

E – Ground

Constant

Battery positive voltage

ABS MTR

G – Ground

Constant

Battery positive voltage

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

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.