Lexus ES300 (1997 year). Manual — part 653
206
SRS
FROM POWER SOURCE SYSTEM (SEE PAGE 56)
10A
ECU–B
2J
7
1
2
SPIRAL
CABLE
II
IF
10
9
8
5
5
11
2
3
6
7
16
15
B–
O
GR
Y–
B
Y
Y–
R
Y–
G
P–
B
B–
Y
W–
B
W–
B
B–
Y
IG2
ACC
D+
D–
P+
P–
E1
E2
TC
LA
AIRBAG SQUIB
(STEERING
WHEEL PAD)
A31
AIRBAG SENSOR ASSEMBLY
A29
WARNING
B. METER]
TC
AB
1
2
AIRBAG SQUIB
(FRONT PASSENGER
AIRBAG ASSEMBLY)
A30
1N
3
1V
3
W–
B
1N
1
1J
7
W–
B
W–
R
W–
R
IG2
2
B
B
A
A
A
IK3
7
IK3
11
LG
–R
LG
LG
–R
LG
B–Y
A
JUNCTION
CONNECTOR
J15
JUNCTION
CONNECTOR
J 1
A
C
B
B
IK3
6
ED
A
3
3
A
A
4
E1
BR
LG–R
BR
BR
BR
B
R
B
JUNCT
IO
N
CO
NN
E
C
T
O
R
B
J
8
, J
9
A
DA
T
A
L
IN
K
CO
NN
E
C
T
O
R 2
JUNCTION
CONNECTOR
J24
D 3
TC
E1
D 1
DATA LINK
CONNECTOR 1
9
8
SRS
LIGHT
[COM
C10
5A
IGN
1N
4
15A
CIG
1N
2
1W
3
1G
2
207
THE SRS IS A DRIVER AND PASSENGER PROTECTION DEVICE WHICH HAS A SUPPLEMENTAL ROLE TO THE SEAT
BELTS. WHEN THE IGNITION SW IS TURNED TO ACC OR ON, CURRENT FROM THE CIG FUSE FLOWS TO TERMINAL
16 OF THE AIRBAG SENSOR ASSEMBLY. ONLY WHEN THE IGNITION SW IS ON DOES THE CURRENT FROM THE IGN
FUSE TO TERMINAL 15. IF AN ACCIDENT OCCURS WHILE DRIVING, WHEN THE FRONTAL IMPACT EXCEEDS A SET
LEVEL, CURRENT FROM THE CIG OR IGN FUSE FLOWS TO TERMINALS 7 AND 3 OF THE AIRBAG SENSOR
ASSEMBLY
→
TERMINAL 1 OF THE AIRBAG SQUIBS
→
TERMINAL 2
→
TERMINAL 6 AND 2 OF THE AIRBAG SENSOR
ASSEMBLY
→
TERMINAL 9 OR TERMINAL 10 OR BODY GROUND
→
GROUND, SO THAT THE CURRENT FLOWS TO
THE AIRBAG SQUIBS AND CAUSES IT TO OPERATE.
THE AIRBAG STORED INSIDE THE STEERING WHEEL PAD IS INSTANTANEOUSLY EXPANDED TO SOFTEN THE
SHOCK TO THE DRIVER. THE AIRBAG STORED INSIDE THE PASSENGER’S INSTRUMENT PANEL IS
INSTANTANEOUSLY EXPANDED TO SOFTEN THE SHOCK TO THE PASSENGER.
: PARTS LOCATION
CODE
SEE PAGE
CODE
SEE PAGE
CODE
SEE PAGE
A29
D 1
J 9
B
A30
28
D 3
28
J15
29
A31
28
J 1
29
J24
29
C10
28
J 8
A
29
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
CODE
SEE PAGE
JUNCTION BLOCK AND WIRE HARNESS (CONNECTOR LOCATION)
1G
INSTRUMENT PANEL WIRE AND INSTRUMENT PANEL J/B (LOWER FINISH PANEL)
1J
1N
COWL WIRE AND INSTRUMENT PANEL J/B (LOWER FINISH PANEL)
1V
COWL WIRE AND INSTRUMENT PANEL J/B (LOWER FINISH PANEL)
1W
2J
COWL WIRE AND ENGINE ROOM J/B (ENGINE COMPARTMENT LEFT)
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
CODE
SEE PAGE
JOINING WIRE HARNESS AND WIRE HARNESS (CONNECTOR LOCATION)
IG2
INSTRUMENT PANEL WIRE AND COWL WIRE (RIGHT SIDE OF INSTUMENT PANEL J/B)
IK3
38
ENGINE WIRE AND COWL WIRE (UNDER THE GLOVE BOX)
: GROUND POINTS
CODE
SEE PAGE
GROUND POINTS LOCATION
ED
SURGE TANK RH
IF
COWL SIDE PANEL LH
II
INSTRUMENT PANEL BRACE LH
SYSTEM OUTLINE
208
SRS
A
A
A
A
A
A
J15
C C C
B B B
A GRAY
J 8
B GRAY
J 9
A A
A A
A A A A A A A
J24
A
B
8
X 2
3
X
5
6
7
9 10
X X
X X
15 16
1
2
1
2
9
8
X X
X
5
X
X
X
X 11
X X
X
X
X
X
X
X
A A A
B B
A A A B B B B B
A29 YELLOW
A30 YELLOW
A31 YELLOW
C10 BROWN
J 1
GRAY
D 1
BLACK
X
X
3
4
X
X
X
X
X
X
X
X
X
3
DARK GRAY
D 3
(HINT : SEE PAGE 7)
(HINT : SEE PAGE 7)
(HINT : SEE PAGE 7)
(HINT : SEE PAGE 7)
(HINT : SEE PAGE 7)
A
A
A
A
209
MOON ROOF
CURRENT IS APPLIED AT ALL TIMES THROUGH THE POWER FUSE TO TERMINAL 5 OF THE POWER RELAY. WITH
THE IGNITION SW TURNED ON, THE CURRENT FLOWS THROUGH THE GAUGE FUSE
→
TERMINAL 7 OF THE
INTEGRATION RELAY
→
TERMINAL 3
→
TERMINAL 1 OF THE POWER RELAY
→
TERMINAL 2
→
GROUND.
AS A RESULT, POWER RELAY IS ACTIVATED AND THE CURRENT TO TERMINAL 5 OF THE POWER RELAY FLOWS
FORM TERMINAL 3 OF THE POWER RELAY TO TERMINAL 4 OF THE MOON ROOF CONTROL SW AND MOON ROOF
CONTROL RELAY.
1. SLIDE OPEN OPERATION
WHEN TURNING THE SLIDE OPEN SW “ON” WITH THE ROOF CLOSED, THE MOON ROOF CONTROL SW AND MOON
ROOF CONTROL RELAY WILL MAKE THE MOTOR ROTATE TO THE “OPEN” DIRECTION UNTIL THEY BECOME ANY OF
THE FOLLOWING CONDITIONS SUCH AS THE TERMINAL IG BECOMES “OFF” OR ANY OF THE SWS IS TURNED “ON”
OR THE TIME LIMIT (ABOUT 20 SECONDS) IS UP OR THE CURRENT GOES UP THE UPPER LIMIT
(ABOUT 17 AMPERE).
2. SLIDE CLOSE OPERATION
WHEN TURNING THE SLIDE CLOSE SW (TILT UP) “ON” WITH THE ROOF OPEN, THE MOON ROOF CONTROL SW AND
MOON ROOF CONTROL RELAY WILL MAKE THE MOTOR ROTATE TO THE “CLOSE” DIRECTION UNTIL THEY BECOME
HALF POSITION (LS1 SW TURNS FROM “ON” TO “OFF”). UNDER THE CONDITION WITH THE ROOF HALF CLOSED,
WHEN TURNING THE SLIDE CLOSE SW (TILT UP) “ON” AGAIN, THEY WILL MAKE THE MOTOR ROTATE UNTIL THE
ROOF IS COMPLETELY CLOSED.
3. TILT UP OPERATION
WITH THE ROOF CLOSED, WHEN THE TILT UP SWITCH IS PUSHED ON, THE MOON ROOF CONTROL SW AND MOON
ROOF CONTROL RELAY DRIVES THE MOTOR IN DIRECTION OF UP (LS1 SW OFF, LS2 SW OFF).
4. TILT DOWN OPERATION
WHEN THE ROOF UP, WHEN THE TILT DOWN SWITCH (SLIDE OPEN) IS PUSHED ON, THE MOON ROOF CONTROL
SW AND MOON ROOF CONTROL RELAY DRIVES THE MOTOR IN DIRECTION OF DOWN, AND THE MOTOR STOPS AT
FULLY DOWN POSITION (LS1 SW OFF TO ON).
5. KEY OFF MOON ROOF OPERATION
WITH THE IGNITION SW TURNED FROM ON TO OFF, INTEGRATION RELAY OPERATES AND CURRENT FLOWS FROM
THE DOOR FUSE TO TERMINAL 1 OF THE RELAY
→
TERMINAL 3
→
TERMINAL 1 OF THE POWER RELAY
→
TERMINAL 2
→
GROUND FOR ABOUT 43 SECONDS. THE SAME AS NORMAL OPERATION, THE CURRENT FLOWS
FROM THE POWER FUSE TO TERMINAL 5 OF THE POWER RELAY
→
TERMINAL 3
→
TERMINAL 4 OF THE MOON
ROOF CONTROL SW AND MOON ROOF CONTROL RELAY. AS A RESULT, FOR ABOUT 43 SECONDS AFTER THE
IGNITION SW IS TURNED OFF, THE FUNCTIONING OF THIS RELAY MAKES IT POSSIBLE TO OPEN AND CLOSE THE
MOON ROOF. ALSO, BY OPENING THE FRONT DOOR (DOOR COURTESY SW ON)WITHIN ABOUT 43 SECONDS
AFTER TURNING THE IGNITION SW TO OFF, A SIGNAL IS INPUT TO TERMINALS 6 OR 6 OF THE INTEGRATION
RELAY. AS A RESULT, THE RELAY TURNS OFF AND OPEN OPEN CLOSE MOVEMENT OF THE MOON ROOF STOPS.
SYSTEM OUTLINE
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