Lexus SC300 / Lexus SC400. Manual - part 988

199

6. TILT UP REMINDER SYSTEM

WITH THE IGNITION SW IS TURNED TO ACC OR OFF WITH THE MOON ROOF STILL TILTED UP, KEY OFF MOON ROOF OPERATION
CAUSES CURRENT TO FLOW TO TERMINAL 6 OF THE MOON ROOF CONTROL RELAY FOR A PERIOD OF APPROX. 60 SECONDS OR
UNTIL THE DRIVER’S DOOR OR PASSENGER’S DOOR IS OPENED. WHEN KEY OFF MOON ROOF OPERATION ENDS AND THE
CURRENT FLOW IS STOPPED, THE MOON ROOF CONTROL RELAY RECEIVES A SIGNAL THAT THE IGNITION SW IS OFF. MOON
ROOF LIMIT SW NO. 1 AND NO. 2 ARE OFF AT THIS TIME, SO THE SIGNAL IS INPUT TO TERMINALS 8 AND 9 OF THE MOON ROOF
CONTROL RELAY, INDICATING THAT THE MOON ROOF IS IN THE TILT UP CONDITION. THIS CURRENT TO THE MOON ROOF
CONTROL RELAY FLOWS TO TERMINAL 12 OF RELAY 

→

 BUZZER 

→

 TERMINAL 11 

→

 GROUND, CAUSING THE BUZZER TO SOUND

FOR APPROX. 8 SECONDS. TO INFORM THE DRIVER THAT THE MOON ROOF IS IN THE TILT UP POSITION.

POWER MAIN RELAY

3–5 : CLOSED WITH IGNITION SW AT ON POSITION

M 2

  MOON ROOF CONTROL RELAY

11–GROUND : ALWAYS CONTINUITY

6–GROUND : APPROX. 12 VOLTS WITH IGNITION SW AT ON POSITION
4–GROUND : APPROX. 12 VOLTS WITH IGNITION SW ON, AND MOON ROOF CONTROL SW AT CLOSE OR UP POSITION

(EXCEPT APPROX. 200MM (7.9 IN) BEFORE FULLY CLOSED POSITION)

5–GROUND : APPROX. 12 VOLTS WITH IGNITION SW ON, AND MOON ROOF CONTROL SW AT OPEN OR DOWN POSITION

M 3

  MOON ROOF CONTROL SW

1–4 : CLOSED WITH MOON ROOF CONTROL SW AT UP POSITION
2–4 : CLOSED WITH MOON ROOF CONTROL SW AT CLOSE POSITION
3–4 : CLOSED WITH MOON ROOF CONTROL SW AT DOWN POSITION
5–4 : CLOSED WITH MOON ROOF CONTROL SW AT OPEN POSITION
4–GROUND : ALWAYS CONTINUITY

: PARTS LOCATION

CODE

SEE PAGE

CODE

SEE PAGE

CODE

SEE PAGE

D10

30

M 3

31

T 8

B

29

D11

30

M 4

A

31

T 9

A

29

M 2

31

M 4

B

31

: RELAY BLOCKS

CODE

SEE PAGE

RELAY BLOCKS (RELAY BLOCK LOCATION)

2

19

ENGINE COMPARTMENT LEFT

: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR

CODE

SEE PAGE

JUNCTION BLOCK AND WIRE HARNESS (CONNECTOR LOCATION)

1B

20

ENGINE ROOM MAIN WIRE

1D

20

FRONT DOOR LH WIRE

1F

20

ROOF WIRE

1H

1I

20

COWL WIRE

1J

20

COWL WIRE

1K

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS

CODE

SEE PAGE

JOINING WIRE HARNESS AND WIRE HARNESS (CONNECTOR LOCATION)

IP1

38

FRONT DOOR RH WIRE AND COWL WIRE (RIGHT KICK PANEL)

BZ1

40

ROOF WIRE AND MOON ROOF WIRE (FRONT SIDE OF ROOF LEFT)

: GROUND POINTS

CODE

SEE PAGE

GROUND POINTS LOCATION

IF

36

LEFT KICK PANEL

IJ

36

RIGHT KICK PANEL

: SPLICE POINTS

CODE

SEE PAGE

WIRE HARNESS WITH SPLICE POINTS

CODE

SEE PAGE

WIRE HARNESS WITH SPLICE POINTS

B 1

40

ROOF WIRE

B 3

40

MOON ROOF WIRE

SERVICE HINTS

200

MOON ROOF

OVERALL ELECTRICAL WIRING DIAGRAM

1

2

34

1

LEXU

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B–Y

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B–W

L–O

B

B–O

B

B–W

Y–G

Y–G

Y–G

B–Y

W

B

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L–O

Y–G

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4

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H

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B

2

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5

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7

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1 LEXUS SC300(Cont’ d)

2 EC2

1 EC2

7 IJ1

1

3

4

5

1

2

B–O

B

B

B–O

2

1

B–

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B–

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B

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B–

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W–

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W–Y

Y–

G

W–Y

Y–G

To Engine and ECT ECU ” IGT1” <2–8>

To Engine and ECT ECU ” IGF1” <2–8>

To Check Connector ” IG–” <2–4>

IGF

IGT

+B

C–

TAC

I 2
IGNITER
NO. 1

I 4
IGNITION COIL
NO. 1

DISTRIBUTOR

N3

N

O

ISE

F

IL

T

E

R

( f

o

r

Ign

ition

S

y

st

e

m

)

Ignition

B–

O

8 IK1

To Comb. Meter ” TACHO” <21–7>

B–O

B