1991 LEXUS SC400 radio antenna

4
XXXX10 4
XXXX10
BDB
R2 R2
A32
12 3
45678 A
A32
13
8X A
R4
3
89
C
R5
X23 456
7891011121314
205
A32 AUTO ANTENNA MOTOR AND RELAY
3±GROUND : ALWAYS APPROX. 12 VOLTS
6±GROUND : APPROX. 12 VOLTS WITH IGNITION SW AT ON POSITION
8±GROUND : APPROX. 12 VOLTS WITH IGNITION SW AT ACC OR ON POSITION
7±GROUND : ALWAYS CONTINUITY
R 4(A), R 5(C) RADIO AND PLAYER
(A) 3, (C) 3±GROUND : APPROX. 12 VOLTS WITH IGNITION SW AT ACC OR ON POSITION
: PARTS LOCATION
CODESEE PAGECODESEE PAGECODESEE PAGE
A32A30R2A29 (W/ CD PLAYER)R 4B29 (W/ CD PLAYER)A32B30R 2D29 (W/O CD PLAYER)R 5C29 (W/O CD PLAYER)
: RELAY BLOCKS
CODESEE PAGERELAY BLOCKS (RELAY BLOCK LOCATION)
219ENGINE COMPARTMENT LEFT
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
CODESEE PAGEJUNCTION BLOCK AND WIRE HARNESS (CONNECTOR LOCATION)
1C20FLOOR WIRE
1E20INSTRUMENT PANEL WIRE
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
CODESEE PAGEJOINING WIRE HARNESS AND WIRE HARNESS (CONNECTOR LOCATION)
IE136ENGINE ROOM MAIN WIRE AND COWL WIRE (R/B NO. 4)
IG236INSTRUMENT PANEL WIRE AND COWL WIRE (R/B NO. 5)
IQ138INSTRUMENT PANEL WIRE AND CONSOLE BOX WIRE (UNDER THE INSTRUMENT PANEL CENTER)IQ238INSTRUMENT PANEL WIRE AND CONSOLE BOX WIRE (UNDER THE INSTRUMENT PANEL CENTER)
BV140FLOOR NO 3 WIRE AND CONSOLE BOX WIRE (UNDER THE INSTRUMENT PANEL CENTER)BV240FLOOR NO. 3 WIRE AND CONSOLE BOX WIRE (UNDER THE INSTRUMENT PANEL CENTER)
Bc140FLOOR NO 3 WIRE AND FLOOR WIRE (UNDER THE LEFT SIDE OF REAR SEAT CUSHION)Bc240FLOOR NO. 3 WIRE AND FLOOR WIRE (UNDER THE LEFT SIDE OF REAR SEAT CUSHION)
: GROUND POINTS
CODESEE PAGEGROUND POINTS LOCATION
BM40BACK PANEL CENTER
: SPLICE POINTS
CODESEE PAGEWIRE HARNESS WITH SPLICE POINTSCODESEE PAGEWIRE HARNESS WITH SPLICE POINTS
I3138CONSOLE BOX WIRE
SERVICE HINTS
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1234
19 LEXUS SC300
4ACC
IG1
ST1
AM1 3
2
3BV1
2 BV2 1 BV2 6 IQ2 7 I Q2 4 BV2 3 BV2 10 BV2 9 BV2 6 BV1 5 BV1 4 BV1
10 I F2 1 IF22IG2 1IG2 11Bc2 12Bc2
10 BV1
11 IQ2 3 IQ1
7 BV2 2 BV1 19 BV1 7 BV1 18 BV1
3IG2
1Bc2
10 Bc 1
9Bc1
8Bc1
23 Bc1
8 BV2
12 IQ2 24 Bc 1
II BM 1J
5
1J
8
2
1C
6
1E
10
2
1B
4 1J
7
AMP E
MU TE A MP RU ± RU +
7A
10 C
4C
8A
3A
4A
3D
1D
6D
2D
3C
1A
6 5A 2A 6A 1B 3B 2B 6B 1C 5C 9C 2C
74
MU TE
AMP
RU±
RU+
RL±
RL +
RR±
RR+
FL±
FL+
FR±
FR+ TLMT PWR VOL+ VOLC SGND B ACC ANT ANTA ANTB WP+ WP± ACC +B E ANTB ANTA ANT ACC B IG
6
3
8
5
2
1
7
3
4
9
10
26 5 1 47
B
W
P±L
R± B BR
R± B P±L
W B Y B
W R
V
V
V
R
W B
Y
B
W
P±L
BR
BR P± L
W± B Y± R
L±W
P±G GR
L±Y
B±R
R±W
B±W
GR
L±Y
BR
L±Y
GR L±Y
GR
P± G
L±W Y±R L±Y
G±RL±YGR
P± G
L±W Y±R
Y±R
L±WP±G GR
L±Y L±Y W
P±L
VV
G±RR±L
R± W G± Y W
W± L W
LG L
P
P
P
P
V LG
L W
BR
BR
B±Y
P±L
B±Y
E
1 11 2
2 22 1
60A MAIN
100A AM1
120A ALT
40A
IGSW I15
IGNITION SW
BATTERY 20A
RADIO No. 1
7. 5A
RA DI O No. 2
RADIO AND PLAYER
F9
FUSE BLOCK A3 2
AUTO ANTENNA MOT OR AND REL AY
W1 0
WOOF ER SPEAKER
AMPLIFIER
W9
WOOFER
SPEAKER
R12
REAR
SPEAKER LH
R13
REAR
SPEAKER RH
F1 0
FRONT DOOR
SPEAKER LH
15A
ECU±I G
To Telephone Tr ans ceiv er
and Speaker Relay
< 18±7>
To A/ C Cont rol Sw
and Radio Sw
< 22±4>
To A/ C Cont rol Sw
and Radio Sw
< 22±4>
To Telephone Transc eiver
and Speak er Relay
< 18±7>
Power
Source
Radio and Player
(
w/ o CD Player )
Auto Antenna
2IE1L±Y
( SHI ELDED )
P± L (
SHI EL DED )
R2 ,R3 ,R5 , R6
CDA B 12
5
34
678910 12
3456
12 34
5678910 12
3456
CD A B
R2 R3 R5 R6 RADIO AND PLAYER
L±Y
GR
3
4
Under the
as htr ay RHBack panel
center
8
7
BR
Y B
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567 8
20 LEXUS SC300(
Cont ' d )
2
MUTE
5 RU±1
RU+
9
WF±
10WF+
6
AMP 8
GN D 3
B 4
ACC 7
E 6 BV2 5 BV2 2 IG2 1 IG2
11 BC2 12 BC2
10 IF2 1 IF2
6 IQ2 7 IQ2
1B FR+ 2B
FL +
5B
FR± 6B
FL ± 3B
RR+ 4B
RR± 8B
RL+ 9B
RL ±
6A AMP
11 ASGND
10 AGND
9ABEEP
3AMU TE
8AR¥
L
7AR¥
R
2AR¥
L
1AF¥
R
7AE
2
12 121
2
1
8 BV2
12 IQ2 II 23 Bc1 9 Bc1
8Bc1 1Bc2 10Bc1 1J
5
1C
6
4
AMP
7E
1
ANTB 2
ANTA 5
ANT3
B 8
ACC 6
IG
24 Bc 1
BM
B±Y
GR
L±Y
L±W B± R
L±G
Y± R
R± BL±B
P±L WB
BR
GY
W
BR L
R L±Y
R± B P± L P± L
BR
BR
P
V
P
V
P
V
P
V
LG
L
P
V
B Y
Y±R
L±W
P± G L±Y GR
B±RGR
L±Y
B±R L±G
Y±R
Y B
W R
P±L
P±L
W± B
BR
BR BR BR
R
L
BR W
Y
G
BR
P±L GR
L±Y
L±W L±B P±L
L±YGR GR
B± Y
To Telephon
Transceiver
and Relay< 18±1>
15A
ECU± I G
W
B
B±W
R± W
W9
WOOFER
SPEAKER
W10 WOOFER SPEAKER
AMPLIFIER STEREO POWER AMPLIFIERR12
REAR
SPEAKER LH
R13
REAR
SPEAKER RH
F10
FRONT DOOR
SPEAKER LH
A32
AUTO ANTENNA MOTOR AND RELAY
Radio and Player(
w/ CD Player )
Auto Antenna
(SHI ELDED )
( SHI ELDED ) (
SHIELDED )
(
PIONEER )
( PIONEER )
P± L
(NAKAMICHI )
( PI ONEER )
(
PIONEER )
BR±B
S13 , S14 AB
6
4
3
2
1
7 8 9 10 11 12 14 5
13
12
5 34
678910 A
B
STEREO POWER
AMPLIFIER
S1 3
S1 4
P±L L±B
Under the
as htr ay RH Back panel c ent er
(
PIONEER )
10 B 14 AL±YGR+B ACC
L±Y
GR
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244
Rear Window Defogger
and Mirror Heater
Remote Control Mirror
Seat Heater
Shift Lock
SRS AIRBAG
Starting
Taillight and
Stop Light
Theft Deterrent and
Door Lock Control
Turn Signal and Hazard
Warning Light
Wiper and Washer
Wireless Door Lock
Remote Control
Horn
Ignition
Illumination
Interior Light
Liquid Crystal Inner
Rear View Mirror
Moon Roof
Power Seat
(Driver's)
Power Source
Power Window
PPS (Progressive
Power Steering
Radio and Player
ABS and
Traction Control
Automatic
Air Conditioner
Auto Antenna
Back±Up Light
Cellular Mobile
Telephone
Charging
Cigarette Lighter
Combination Meter
Cruise Control
Headlight and Light Auto
Turn Off (for USA)
Headlight
(for Canada) ECT and
A/T Indicator
4±2 16±2 7±2
3±2 21±2 3±8
14±4
18±2 19±4 (w/o CD Player)
20±8 (w/ CD Player)9±2 8±2
4±7 (for USA)
5±7 (for Canada)11±2
12±311±5 (w/ Driving
Position Memory)11±7 12±1 1±5 13±2
6±2 15±2 14±2
13±2
17±7 7±3 17±2 15±3
1±315±2
Power Tilt and
Power Telescopic12±2
Power Seat (Passengerºs
and Electric Tension Header
5±2 2±2
Cornering Light ABS (Anti±Lock
Brake System)
22±2
Engine Control Unlock and Seat
Belt Warning
1±2
23±2 (w/o Driving
Position Memory)
1 23±119±2 (w/o CD Player
20±2 (w/ CD Player
14±310±2 (w/ Memory)
5±7 (w/o Memory)
4±3 (for USA)
5±3 (for Canada) 4±5 (for USA)
5±5 (for Canada)
OVERALL ELECTRICAL WIRING DIAGRAM
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46
POWER SOURCE (Current Flow Chart)*1: USA
*2: CANADA
60
216
226
192178
226 90 144 134 216 102 202
208
212 90
167
A2 A15 C6 B2
B1
A10 A14 A12 A17A13 A23 A24 A25 A32 C11 B3 B4 B6 C3 C10C7
A21
Blower Resistor Auto Antenna Motor
And Relay A/C Magnetic Clutch
Alternator
A/C Control Assembly
A/C Power Transistor
A/T Indicator Light
(for Shift Lever) A/C Control SW and
Radio SWABS ECU
ABS and Traction ECUBrake Fluid Level SW
Blower Motor
Center Airbag Assembly Check Connector
Cornering Light LH
Cigarette Lighter Back±Up Light SW Buckle SW LHABS and Traction ECUCornering Light RH
190
226 22690
126
226 10168
134
144
178


* These are the page numbers of the first page on which the related system\
is shown.
The part indicated is located somewhere in the system, not necessarily o\
n the page indicated here. *Page Nos. of
Related Systems
Parts
Code or
Location
CB or Fuse
50A DEFOG
30A DOOR
30A POWER
15A STOP
15A ECU±B
10A MIR±HTR
10A HEATER
20A TURN
20A WIPER
10A GAUGE
15A ECU±IG
7.5A ENGINE
7.5A IGN
15A CIG
7.5A RADIO No.2
15A TAIL
7.5A PANEL
7.5A ST
15A TEL
10A DOME
20A RADIO No.1
25A HAZ±HORN
30A EFI
7.5 ALT SENCING
15A HEAD LH*1
15A HEAD RH*1
15A HEAD LH±LWR*2
15A HEAD RH±LWR*2
15A HEAD LH±UPR
15A HEAD RH±UPR
60A HEATER
7.5A TRAC
15A SEAT±HTR
Location
[LOCATION](1): J/B No. 1 (See page 20)(2): R/B No. 2 (See page 19)(3): R/B No. 4 (See page 23)
20
19 22
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211
1E
10 1C 62
Bc1
23 Bc1 8Bc19
BV2
6BV2 5 IG2
3
IQ2
6IQ2 7
Bc2
11 Bc2 12 IF1
2
IQ2
11
IQ1
3
BV1
2
BV1
18 BV1 7 BV119
Bc1
24 Bc2 1Bc110B19
B19
I31I31
B
3B 4B8B 9 B
3
B
2B 6
B
10 B 4A8A 3A4
L±Y
L±Y
GR
W±B
GR
L±Y
P±L
L±Y
L±Y
L±Y
L±Y
L±Y GR GR
GR
W±B
GR
L±Y P±L
L±YGR
Y±R
L±W
P±G
B±R
Y±R
L±W
P±G
P±G
L±W Y±R
P
P
P
VV
R
W B
Y
Y B
V
1256 438
7
112 2
AMP B ACC E
ANTB ANTA ANT IG AUTO ANTENNA MOTOR
AND RELAY
A32 FROM POWER SOURCE SYSTEM
(
SEE PAGE 56 )
15A
ECU±IG 20A
RADIO
NO. 1
7. 5A
RA DIO
NO. 2
GR
V
V
ANTB ANTA ANT ACC B
TLMT
RADIO AND PLAYER R2
,R3
,R4
ABC
FL+ FL± FR± FR+
RR+ RR± RL+ RL± STEREO POWER AMPLIFIER
S13
,S1 4
AB
REAR SPEAKER
RH REAR SPEAKER
LH
R13
R12 FR+
FR± MUTE SP±
SP+
TELEPHONE TRANSCEIVER
AND SPEAKER RELAY
T16 ,
T17
AB
L±Y
L±Y
B±R
7 8
IG2
1IG2 2
IF2
1IF2 10
V
P
21
FRONT DOOR
SPEAKER LH
F11
V
P
B
12
B
5
B
5B 1
Bc2
3Bc2 4
A5
B5
SHORT CONNECTOR
S22
,S2 3
A
B
A
12 A 5
LGL
( W/ TEL )
(
W/ TEL )
BV1
10
BT1
5BT1 6
IP1
10 IP1 1 Bc1
20
B
4
V
L
LG
FRONT DOOR
SPEAKER RH F12
A
12 B
12SHORT CONNECTOR
S22
,S23
AB
LGL LG
L
LG
LG
L
(W/O TEL )
L
LL
( W/ TEL )
( W/ TEL )
( W/O TEL )
(
W/O TEL )
L
LG
12
( W/ TEL )
( W/O TEL )
BV2
7
L±Y
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214
RADIO AND PLAYER (w/o CD PLAYER)
II
FROM POWER SOURCE SYSTEM
(
SEE PAGE 56 )
BV2
8Bc1 10 Bc21Bc1 24 BV1 4BV15BV16BV13
Bc1
23 Bc1 8Bc19 BV1 19 BV17BV118 BV2
2BV2 1
B19
B19
B16 B1 9
I31
IC
6
BM C
9A 5A1A2
C
8A 4A10 C 1C5
C
7
Bc2
4Bc2 3
P±L P±L P±L P±L
GR
L±Y GR
L±Y
P±L
P±G
L±W Y±R BR
LGL
B±R
GR
L±Y
B±R
GR
GR
L±Y
P±L L±Y
Y±R
L±W P±G
P±G
L±W Y±R BR
LGL
LG
L
LG W±B
BR
W±B
P±LWB
R±B P±L
W B P±B
R±W
B±W GR
L±Y GR
WOOFER SPEAKER AMPLIFIER W10
W9
WOOFER
SPEAKER
RADIO A ND P LA YER ABCD
R2 ,R3
,R5
,R
6
AUTO ANTENNA MOTOR
AND RELAY A32
AB
T16 T17
TELEPHONE
TRANSCEIVER AND
SPEAKER RELAY
651210 9
7125 43
3
8
6 7
15A
ECU±IG
AMP RU± RU+ MUTE WP+ WP±ACC +B
P±L
21
4
IG ACC
MUTE
ANTB ANTA FR±
AMP
IQ2
12
BR
BR
(W/ TEL )
(
W/O TEL )L
(
W/ TEL )
E
(
W/O TEL )
AMP RU± RU+
ANT ANT ANTA ANTB E FR+
FR±
B
FR+
(
SHIELDED )
(
SHIELDED )
A
5A 12
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