1991 LEXUS SC400 Service Repair Manual

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Page 4025 of 4087

LEXUS SC400 1991 Service Repair Manual
170
REMOTE CONTROL MIRROR (w/ DRIVING POSITION MEMORY)
1H
31H 8
9 8 10 15 14 12 5 13 6 3 1 2 74
3126549 IF1
3IF1 4IF2 9IF11IF118 IF1 2IF110 IP2 3IP116 IP2 1IP22IP19IP113 IP1 12
MM M
M
MV MH M+ VSRL V

Page 4026 of 4087

LEXUS SC400 1991 Service Repair Manual
171
310
LH RH
29
LH RH
812
LEFT
RIGHT
UP
DOWN
SE LE C T S W OPERATI ON SW
REMOTE CONTROL MIRROR SW
IG 214
3
1
2
6
4
5
11 16
IF119
IF1
13
IF2
12 Ba1
4Ba1 9
BR±B
W± B
W±B
W
WB Y±B
LG
Y±R
LG±B
P±

Page 4027 of 4087

LEXUS SC400 1991 Service Repair Manual
172
REMOTE CONTROL MIRROR (w/ DRIVING POSITION MEMORY)
CURRENT IS ALWAYS APPLIED TO TERMINAL +B OF REMOTE CONTROL MIRROR ECU THROUGH THE ECU±B FUSE.
WHEN THE IGNITION SW IS TURNED TO ON OR ACC P

172
REMOTE CONTROL MIRROR (w/ DRIVING POSITION MEMORY)
CURRENT IS ALWAYS APPLIED TO TERMINAL +B OF REMOTE CONTROL MIRROR ECU THROUGH THE ECU±B FUSE.
WHEN THE IGNITION SW IS TURNED TO ON OR ACC POSITION, THE CURRENT FLOWS TO TERMINAL ACC OF THE REMOTE
CONTROL MIRROR ECU THROUGH THE RADIO NO. 2 FUSE.
REMOTE CONTROL MIRROR OPERATION
WHEN THE IGNITION SW IS TURNED TO ON OR ACC POSITION, THE REMOTE CONTROL MIRROR ECU OPERATES. WHEN THE
SELECT SW OF THE REMOTE CONTROL MIRROR SW IS MOVED TO THE LH POSITION AND THE OPERATION SW IS MOVED TO
ªLEFTº SIDE, A SIGNAL IS INPUT FROM TERMINAL SWO2 OF REMOTE CONTROL MIRROR ECU TO TERMINAL 2 OF REMOTE
CONTROL MIRROR SW " TERMINAL 12 "TERMINAL SWI2 OF ECU.
AS A RESULT, THE CURRENT TO TERMINAL +B OF ECU FLOWS FROM TERMINAL MHL OF ECU "TERMINAL 1 OF REMOTE
CONTROL MIRROR LH " MOTOR " TERMINAL 2 "TERMINAL M+L OF ECU "TERMINAL GND "GROUND , ROTATING THE MOTOR
TO ADJUST THE ANGLE OF THE LEFT SIDE OF THE OUTER MIRROR (DRIVER'S).
TO CHANGE THE ANGLE OF THE RIGHT SIDE OF THE MIRROR, THE OPERATION SW OF THE REMOTE CONTROL MIRROR SW IS
MOVED TO THE ªRIGHTº SIDE.
THEN, A SIGNAL IS INPUT FROM TERMINAL SWO2 OF REMOTE CONTROL MIRROR ECU " TERMINAL 2 OF REMOTE CONTROL
MIRROR SW " TERMINAL 8 "TERMINAL SWI1 OF ECU. AS A RESULT, THE CURRENT TO TERMINAL +B OF REMOTE CONTROL
MIRROR ECU FLOWS FROM TERMINAL M+L OF ECU " TERMINAL 2 OF REMOTE CONTROL MIRROR " MOTOR " TERMINAL 1 "
TERMINAL MHL OF ECU " TERMINAL GND " GROUND, CAUSING THE ANGLE OF THE OUTER MIRROR (DRIVER'S) TO CHANGE ON
THE RIGHT SIDE.
THE MOVEMENT TO OTHER POSITIONS OCCURS SIMILARLY, SO ONLY THE CURRENT FLOW TO EACH MOTOR IS SHOWN:
SELECT SW RH POSITION, OPERATION SW LEFT POSITION
TERMINAL +B OF REMOTE CONTROL MIRROR ECU "TERMINAL MHR "TERMINAL 1 OF REMOTE CONTROL MIRROR " MOTOR "
TERMINAL 2 "TERMINAL M+R OF ECU "TERMINAL GND "GROUND .
SELECT SW RH POSITION, OPERATION SW RIGHT POSITION
TERMINAL +B OF REMOTE CONTROL MIRROR ECU "TERMINAL M+R "TERMINAL 2 OF REMOTE CONTROL MIRROR " MOTOR "
TERMINAL 1 "TERMINAL MHR OF ECU " TERMINAL GND "GROUND .
SELECT SW LH POSITION, OPERATION SW UP POSITION
TERMINAL +B OF REMOTE CONTROL MIRROR ECU " TERMINAL MVL " TERMINAL 3 OF REMOTE CONTROL MIRROR " MOTOR "
TERMINAL 2 "TERMINAL M+L OF ECU "TERMINAL GND "GROUND .
SELECT SW LH POSITION, OPERATION SW DOWN POSITION
TERMINAL +B OF REMOTE CONTROL MIRROR ECU "TERMINAL M+L "TERMINAL 2 OF REMOTE CONTROL MIRROR " MOTOR "
TERMINAL 3 "TERMINAL MVL OF ECU " TERMINAL GND "GROUND .
SELECT SW RH POSITION, OPERATION SW UP POSITION
TERMINAL +B OF REMOTE CONTROL MIRROR "TERMINAL MVR "TERMINAL 3 OF REMOTE CONTROL MIRROR " MOTOR "
TERMINAL 2 "TERMINAL M+R OF ECU "TERMINAL GND "GROUND .
SELECT SW RH POSITION, OPERATION SW DOWN POSITION
TERMINAL +B OF REMOTE CONTROL MIRROR "TERMINAL M+R "TERMINAL 2 OF REMOTE CONTROL MIRROR " MOTOR "
TERMINAL 3 "TERMINAL MVR OF ECU " TERMINAL GND "GROUND .
THE NUMBER OF TURNS OF EACH MOTOR (AMOUNT OF MOVEMENT OF EACH PART OF THE MIRROR) IS DETECTED BY THE
POSITION SENSORS AND INPUT TO THE ECU, MAKING IT POSSIBLE TO PERFORM MEMORY AND RETURN FUNCTIONS FOR THE
MIRROR POSITION USING THE DRIVING POSITION MEMORY AND RETURN SWITCH.
SYSTEM OUTLINE
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Page 4028 of 4087

LEXUS SC400 1991 Service Repair Manual
173
D10 DOOR LOCK MOTOR, DOOR UNLOCK DETECTION SW AND DOOR OPEN DETECTION SW LH
3±6 : CLOSED WITH FRONT DOOR LH OPEN
D12 DRIVING POSITION MEMORY AND RETURN SW
4±3 : CLOSED WITH SET SW ON
2±3 : C

173
D10 DOOR LOCK MOTOR, DOOR UNLOCK DETECTION SW AND DOOR OPEN DETECTION SW LH
3±6 : CLOSED WITH FRONT DOOR LH OPEN
D12 DRIVING POSITION MEMORY AND RETURN SW
4±3 : CLOSED WITH SET SW ON
2±3 : CLOSED WITH MEMORY NO. 1 SW ON
1±3 : CLOSED WITH MEMORY NO. 2 SW ON
R18 REMOTE CONTROL MIRROR SW 2±12: CONTINUITY WITH SELECT SW AT LH POSITION AND OPERATION SW AT LEFT POSITION
2±8: CONTINUITY WITH SELECT SW AT LH POSITION AND OPERATION SW AT RIGHT POSITION
9±12: CONTINUITY WITH SELECT SW AT RH POSITION AND OPERATION SW AT LEFT POSITION
9±8: CONTINUITY WITH SELECT SW AT RH POSITION AND OPERATION SW AT RIGHT POSITION
3±12: CONTINUITY WITH SELECT SW AT LH POSITION AND OPERATION SW AT UP OPERATION
3±8: CONTINUITY WITH SELECT SW AT LH POSITION AND OPERATION SW AT DOWN POSITION
10±12: CONTINUITY WITH SELECT SW AT RH POSITION AND OPERATION SW AT UP POSITION
10±8: CONTINUITY WITH SELECT SW AT RH POSITION AND OPERATION SW AT DOWN POSITION
R 7 REMOTE CONTROL MIRROR ECU
4±GROUND : ALWAYS APPROX. 12 VOLTS
7±GROUND : APPROX. 12 VOLTS WITH IGNITION SW AT ACC OR ON POSITION
11±GROUND : ALWAYS CONTINUITY 9±GROUND : APPROX. 12 VOLTS WITH REMOTE CONTROL MIRROR LH AT UP OPERATION
8±GROUND : APPROX. 12 VOLTS WITH REMOTE CONTROL MIRROR LH AT LEFT OPERATION
13±GROUND : APPROX. 5 VOLTS
12±GROUND : ALWAYS CONTINUITY 2±GROUND : APPROX. 12 VOLTS WITH REMOTE CONTROL MIRROR RH AT UP OPERATION
1±GROUND : APPROX. 12 VOLTS WITH REMOTE CONTROL MIRROR RH AT LEFT OPERATION
: PARTS LOCATION
CODESEE PAGECODESEE PAGECODESEE PAGE
D1030R 8B29R1831
D1230R1631T1029
R 7A29R1731
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
CODESEE PAGEJUNCTION BLOCK AND WIRE HARNESS (CONNECTOR LOCATION)
1D20FRONT DOOR LH WIRE
1H
1I20COWL WIRE
1J
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
CODESEE PAGEJOINING WIRE HARNESS AND WIRE HARNESS (CONNECTOR LOCATION)
IF136FRONT DOOR LH WIRE AND COWL WIRE (LEFT KICK PANEL)IF236FRONT DOOR LH WIRE AND COWL WIRE (LEFT KICK PANEL)
IP138FRONT DOOR RH WIRE AND COWL WIRE (RIGHT KICK PANEL)IP238FRONT DOOR RH WIRE AND COWL WIRE (RIGHT KICK PANEL)
BT140FLOOR WIRE AND COWL WIRE (LEFT KICK PANEL)
BU140FLOOR WIRE AND INSTRUMENT PANEL WIRE (LEFT KICK PANEL)
Ba142FLOOR WIRE AND FRONT SEAT LH WIRE (UNDER THE FRONT LH SEAT)
: GROUND POINTS
CODESEE PAGEGROUND POINTS LOCATION
IF36LEFT KICK PANEL
IG36INSTRUMENT PANEL BRACE LH
IH36UNDER THE ASHTRAY LH
: SPLICE POINTS
CODESEE PAGEWIRE HARNESS WITH SPLICE POINTSCODESEE PAGEWIRE HARNESS WITH SPLICE POINTS
I 3I1138COWL WIRE
I 438COWL WIREB 940FLOOR MAIN WIRE
I 5B2746FRONT SEAT LH WIRE
SERVICE HINTS
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Page 4029 of 4087

LEXUS SC400 1991 Service Repair Manual
174
REMOTE CONTROL MIRROR (w/ DRIVING POSITION MEMORY)
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Page 4030 of 4087

LEXUS SC400 1991 Service Repair Manual
175
REMOTE CONTROL MIRRORS (w/o DRIVING POSITION MEMORY)
1D
11
MM MM
132
2
3
1
12
92 103 118
IF2
20 IF2 9
1J
1 1D
10
IP1
13 IP1 12 IP1 9 LG±R
W±B W±B
W±B
LG±R
LG±R
LG±R LG±R
LG±R
R±Y
R±Y R

Page 4031 of 4087

LEXUS SC400 1991 Service Repair Manual
176
REMOTE CONTROL MIRRORS (w/o DRIVING POSITION MEMORY)
R18 REMOTE CONTROL MIRROR SW
12±GROUND : APPROX. 12 VOLTS WITH IGNITION SW AT ACC OR ON POSITION
11±8 : CONTINUITY WITH OPERATION SW AT

Page 4032 of 4087

LEXUS SC400 1991 Service Repair Manual
[Engine Compartment]
[Instrument Panel]
18
RELAY LOCATIONS
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