1986 TOYOTA LAND CRUISER lumbar support

I07175
RELEASE FORWARD
I04162
Wire Harness Side:
I07253
(a)
(b)
2
1
1 2
I09880
21
BE-1 12
- BODY ELECTRICALPOWER SEAT CONTROL SYSTEM
2485 Author
: Date
:
2004 LAND CRUISER (RM1071U)
5. INSPECT DRIVER'S LUMBAR SUPPORT SWITCH
CONTINUITY
Switch positionTester connectionSpecified condition
FORWARD1 - 4
2 - 3Continuity
OFF1 - 2 - 3Continuity
RELEASE1 - 3
2 - 4Continuity
If continuity is not as specified, replace the switch.
6. INSPECT DRIVER'S LUMBAR SUPPORT SWITCH
CIRCUIT
(a) Disconnect the switch connector and connect the seat
wire harness to the floor wire harness.
(b) Inspect the connector on the wire harness side.
Tester connectionConditionSpecified condition
3 - GroundConstantContinuity
4 - GroundConstantBattery positive voltage
If circuit is not as specified, inspect the circuits connected to oth-
er parts.
7. INSPECT SLIDE MOTOR OPERATION
(a) Connect the positive (+) lead from the battery to terminal
1 and the negative (-) lead to terminal 2, check that the
motor turns clockwise.
(b) Reverse the polarity, check that the motor turns counter-
clockwise.
If operation is not as specified, replace the seat adjuster.
8. INSPECT SLIDE MOTOR PTC THERMISTOR OPERA-
TION
( ): Passenger side
(a) Connect the positive (+) lead from the battery to terminal
2 (1), the positive (+) lead from the ammeter to terminal
1 (2) and the negative (-) lead to the battery negative (-)
terminal, then move the seat cushion to the front position.
(b) Continue to apply voltage, check that current changes to
less than 1 ampere within 4 to 90 seconds.

I04163
1 2
I05473
1 2
I04165
21
I04166
21
- BODY ELECTRICALPOWER SEAT CONTROL SYSTEM
BE-1 15
2488 Author
: Date
:
2004 LAND CRUISER (RM1071U)
15. INSPECT LUMBAR SUPPORT MOTOR OPERATION
(a) Connect the positive (+) lead from the battery to terminal
1 and the negative (-) lead to terminal 2, check that the
lumbar support moves to release side.
(b) Reverse the polarity, check that the lumbar support
moves forward.
If operation is not as specified, replace the seat adjuster.
16. INSPECT LUMBAR SUPPORT MOTOR CIRCUIT
BREAKER OPERATION
(a) Connect the positive (+) lead from the battery to terminal
2 and the negative (-) lead to terminal 1 on the lumbar
support motor connector and move the lumbar support to
front end position.
(b) Continue to apply voltage, check that a circuit breaker op-
eration noise can be heard within 4 to 60 seconds.
(c) Reverse the polarity, check that the lumbar support be-
gins to move to release side within approximately 60 se-
conds.
If operation is not as specified, replace the motor.

- BODY ELECTRICALTROUBLESHOOTING
BE-9
2382 Author
: Date
:
2004 LAND CRUISER (RM1071U) Door key related function does not operate.
1. Door Key Lock and Unlock Switch
2. Wire Harness
3. Body ECUBE-88
-
DI-1038
Key confinement prevention function does not operate.
1. Key Unlock Warning Switch
2. Door Courtesy Switch
3. Wire HarnessBE-29
BE-44
-
POWER SEAT CONTROL SYSTEM:
SymptomSuspect AreaSee page
Both driver and passenger power seats do not operate.
(Door lock does not operate.)1. ALTS Fuse
2. Wire Harness-
-
Driver's seat does not operate.
1. LH SEAT Fuse
2. Power Seat Switch (D)
3. Wire Harness-
BE-1 10
-
Passenger's seat does not operate.
1. RH SEAT Fuse
2. Power Seat Switch (P)
3. Wire Harness-
BE-1 10
-
ºSlide operationº does not operate.
1. Power Seat Switch (D, P)
2. Wire Harness
3. Slide Motor (D, P)BE-1 10
-
BE-1 10
ºFront vertical operationº does not operate.
1. Power Seat Switch (D, P)
2. Wire Harness
3. Front Vertical Motor (D, P)BE-1 10
-
BE-1 10
ºLifter operationº does not operate.
1. Power Seat Switch (D, P)
2. Wire Harness
3. Lifter Motor (D, P)BE-1 10
-
BE-1 10
ºReclining operationº does not operate.
1. Power Seat Switch (D, P)
2. Wire Harness
3. Reclining Motor (D, P)BE-1 10
-
BE-1 10
ºLumbar support operationº does not operate.
1. Power Seat Switch (D)
2. Wire Harness
3. Lumbar Support Motor (D)BE-1 10
-
BE-1 10
(D): Driver's Seat
(P): Passenger's Seat
POWER MIRROR CONTROL SYSTEM:
SymptomSuspect AreaSee page
Mirror does not operate.
1. ACC Fuse
2. Mirror Switch
3. Wire Harness-
BE-1 17
-
Mirror operates abnormally.
1. Mirror Switch
2. Mirror Motor
3. Wire HarnessBE-1 17
BE-1 17
-
SEAT HEATER SYSTEM:
SymptomSuspect AreaSee page
Seat heaters do not operate.
(Driver's and Passenger's)
1. SEAT HTR Fuse
2. Seat Heater Switch (D, P)
3. Wire Harness
4. Seat Heater-
BE-121
-
BE-121
Driver's seat heater does not operate.1. Seat Heater Switch (D, P)
2. Wire HarnessBE-121
-

2004 LAND CRUISER (EWD548U)
74G ELECTRICAL WIRING ROUTING
Position of Parts in Seat
B 5 Buckle SW LH
B 6 Buckle SW RH
L 3 Lumbar Support Control SW (Driver's Seat)
P 23 Power Seat Control SW (Driver's Seat)
P 24 Power Seat Control SW (Front Passenger's Seat)
P 25 Power Seat Motor (Driver's Seat Front Vertical Control)
P 26 Power Seat Motor
(Driver's Seat Lumbar Support Control)
P 27 Power Seat Motor (Driver's Seat Rear Vertical Control)
P 28 Power Seat Motor (Driver's Seat Reclining Control)
P 29 Power Seat Motor (Driver's Seat Slide Control)
P 30 Power Seat Motor
(Front Passenger's Seat Front Vertical Control)
P 31 Power Seat Motor
(Front Passenger's Seat Rear Vertical Control)
P 32 Power Seat Motor
(Front Passenger's Seat Reclining Control)
P 33 Power Seat Motor
(Front Passenger's Seat Slide Control)S 8 Seat Belt Warning Occupant Detection Sensor
S 9 Seat Heater (Driver's Seat)
S 10 Seat Heater (Front Passenger's Seat)
S 15 Seat Heater (Driver's Seat Cushion)
S 16 Seat Heater (Front Passenger's Seat Cushion)
S 17 Seat Position Sensor
S 18 Side Airbag Squib LH
S 19 Side Airbag Squib RH

2004 LAND CRUISER (EWD548U)
377I
Seat Heater
(
Dr iver' s Seat
Cushi on) Power Seat Control
SW (
Driver' s Seat)
B27 W- B W- B
Lumbar Support
Control SW
(
Dr iver' s Seat)W- BBM38
W- BE 2HTR Relay
Headlight LH
(
Low) Parking Light LH
Front Tur n Signal
Light LH
Side Marker
Light LH
Fron t Fog
Light LH
Fron t Fog
Light RH
Parking Light RH
Front Tur n Signal
Light RH
Side Marker
Light RH
Headlight RH
(
Low)
Fuel Pump
Fuel Sender
B 41B56
44
1B
1B43
1A24 1A36
1A37
E 2 1A30
EAW- BW- B
W- B
W- B
W- B
W- B
W- B
W- B
W- B
W- B
W- B
Rear Heater Power
Transistor
W- BW- B
W- B
W- B
W- B
W- B W- B
W- B
Pressure SW
W- B
W- B
B 4 BA310
W- B
BA412
W- B Power Window
Control SW
Rear LHW- B W- B
W- B
(
GND2)
(
GND1)
(
PHG)
(
GND3)
(
GND1) (
GND)
(
PLG)
ABS & BA &
TRAC & VSC
ACTUATOR
(
GND4)
ABS & BA &
TRAC & VSC
ECU
Rheostat
Power Quarter
Window SW LH
Power Quarter
Window SW RH
Remote Control
Mir ror SW(
GND2)
I 2 E14 W- B W- B W- B
W- B
W- B
W- B
W- B
W- B
W- BW- B W- BW- B
BB182K 331A341
1
1 W- B
W- B
W- BIG1 NO. 1 Relay
EFI OR ECD Relay
STARTER Relay 1B39
W- B
1B35 1B40
W- B
Daytime Running
Light Relay No. 3 E15Engine Hood
Courtesy SW W- B 1A43
W- B W- B
Glove Box Light 2Q43
IQ12
W- B SB SBAAEE E14
W- B
W- B
W- B W- B
W- B
W- B
W- B
SB
ASB I18
IF2 11
A
SB
W- B W- B
W- B
W- B
W- BJ12
W- B
W- B Junction
Connector
(
GND)
(
SEL2)

2004 LAND CRUISER (EWD548U)
M OVERALL ELECTRICAL WIRING DIAGRAM
1
234
22 LAND CRUISER
120A J/ B NO. 2
140A ALTBatteryB- G
SLDR SLDF
84FDWN FUP
10 9RCLR RCLF
15LDWN LUP
23 Slide
Front VerticalReclining
Rear Vertic al 12
B
Fro nt Up Fro nt
Up
Re ar Do wn
Re ar
Do wn
2 1
MG
R- W
Y- R
1 2
MG- B
R- B
2 1
MG- R
R- L
1 2
MG- Y
R- Y
BJUnder the Dr iver' s Seat 8BM36 EW- B W- B
2C 1
30A
LH SEAT
12K
10 BM3
E2
12 4B2
3
1BN1 2BN1LF LR
L- W
L- RL- R
L- W
Y- R
Y- R Y- RW- B
W- B
W- B Y- R
Power SourcePower Seat
W- B W- BE
6
BO3 8
Fr ont Side Under the
Fr ont Pass enger ' s SeatBK
R- Y G- Y
M 1
2
R- L G- R
M 1
2
R- B G- B
M 1
2
Y- RR- WG
M 2
1
Down
Rear
Down
Rear Up
Fr on t
Up
Fr on t
B 12
Rear Vertic al Reclining
Fro nt Ver ti c al Slide
2 3 LUP LDWN
5 1 RCLF RCLR
10 9 FUP FDWN
4 8 SL DF S L DR
W- B
10 BO3
2 1
M B- G
30A
RH SEAT 3C 1
3K 1P24
L 3
P2 3
P3 1
P3 2
P3 0
P3 3
P29 P25
P28 P27 P26
Y- R Y- R Y- R
1B 1C120A J/ B NO. 3F1 6(
B)
, F17(
C)
B- G B- G
Lumbar Support
Control SW
(
Dr iver ' s Seat)
Power Seat Cont rol SW (
Driver' s Seat)Power Seat Control SW (
Front Pas senger' s Seat)
Power Seat Motor
(
Dr iver ' s Seat Front Ver tical Contr ol) Power Seat Motor
(
Driver' s Seat Lumbar
Suppor t Cont rol)
Power Seat Motor
(
Dr iver ' s Seat Rear Ver tical Contr ol)
Power Seat Motor
(
Dr iver ' s Seat Rec lining Contr ol)
Power Seat Motor
(
Dr iver ' s Seat Slide Contr ol) Po we r Sea t Mot o r
(
Fr ont Pass enger ' s Seat Fr ont Vert ical Control) Po we r Sea t Mot o r
(
Fr ont Pass enger ' s Seat Rear Vert ical Control)
Po we r Sea t Mot o r
(
Fr ont Pass enger ' s Seat Rec lining Contr ol)
Po we r Sea t Mot o r
(
Fr ont Pass enger ' s Seat Slide Control)
Fusible Link Block

L PART NUMBER OF CONNECTORS
Code Part Name Part NumberCodePart Name Part Number
Note : Not all of the above part numbers of the connector are established for the supply.
2004 LAND CRUISER (EWD548U)
408
J16Junction Connector90980-1 1915J17Junction Connector90980-1 1915
J18Junction Connector
J19Junction Connector90980-1 1661J20Junction Connector90980-1 1661
J21Junction Connector
J22Junction Connector
J23Junction Connector90980-1 1915J25Junction Connector90980-1 1915
J26Junction Connector
K 1Knock Sensor 190980-1 1166K 2Knock Sensor 290980-1 1166
K 3Key Interlock Solenoid90980-10825
L 1License Plate Light LH90980-1 1148L 2License Plate Light RH90980-1 1148
L 3Lumbar Support Control SW (Driver's Seat)90980-10601
M 1Mass Air Flow Meter90980-1 1317
M 2Moon Roof Control ECU90980-10997
M 3Moon Roof Control SW90980-10789
M 4Master Cylinder Pressure Sensor90980-1 1451
M 5Multi-Display90980-12203
M 6Multi-Display90980-12410
M 7Multi-Display90980-12012
M 9Multi-Display90980-12094
N 1Noise Filter (Ignition)90980-10843
N 2Navigation ECU90980-1 1973
N 3Navigation ECU90980-1 1923
N 4Navigation ECU90980-12221
O 2Oil Pressure Sender90980-1 1363
O 5Overhead J/B90980-12155
P 1Park/Neutral Position SW90980-1 1784
P 2Parking Light LH90980-1 1156P 3Parking Light RH90980-11156
P 4Power Outlet (Front)90980-10760
P 5Power Outlet (Rear Console Box)90980-10860
P 6Power Quarter Window SW LH90980-10797
P 7Power Quarter Window SW RH90980-10996
P 8Parking Brake SW90980-10871
P 9Power Outlet (Luggage Compartment)
P10Power Vent Window Motor LH90980-10860
P11Power Vent Window Motor RH
P12Power Window Master SW90980-12166
P14Power Window Motor Front LH
P15Power Window Motor Front RH90980-1 1599P16Power Window Motor Rear LH90980-11599
P17Power Window Motor Rear RH
P18Power Window Control SW Front RH
P19Power Window Control SW Rear LH90980-1 1947
P20Power Window Control SW Rear RH
P21Pretensioner LH90980-1 1862P22Pretensioner RH90980-1 1862
P23Power Seat Control SW (Driver's Seat)
P24Power Seat Control SW (Front Passenger's
Seat)90980-10803
P25Power Seat Motor (Driver's Seat Front
Vertical Control)
P26Power Seat Motor (Driver's Seat Lumbar
Support Control)
P27Power Seat Motor (Driver's Seat Rear
Vertical Control)
P28Power Seat Motor (Driver's Seat Reclining
Control)
P29Power Seat Motor (Driver's Seat Slide
Control)90980-10825
P30Power Seat Motor (Front Passenger's Seat
Front Vertical Control)
P31Power Seat Motor (Front Passenger's Seat
Rear Vertical Control)
P32Power Seat Motor (Front Passenger's Seat
Reclining Control)
P33Power Seat Motor (Front Passenger's Seat
Slide Control)
R 5Remote Control Mirror SW90980-1 1657
R 6Rheostat90980-10799
R 7Room Temp. Sensor (Front)90980-1 1918
R 8Rear A/C Control SW90980-1 1503
R 9Rear Air Mix Control Servo Motor90980-1 1319
R10Rear Combination Light LH90980-1 1587
R11Rear Combination Light LH90980-10908R12Rear Combination Light RH90980-10908
R13Rear Combination Light RH90980-1 1587
R14Rear Cooler Blower Motor90980-10214
R15Rear Cooler Magnetic Valve90980-10860
R16Rear Cooler Power Transistor90980-10171R17Rear Cooler Relay90980-10171
R19Rear Door Speaker LH90980-10935R20Rear Door Speaker RH90980-10935
R21Rear Evaporator Temp. Sensor90980-1 1918
R22Rear Heater Blower Motor90980-10860
R25Rear Heater Power Transistor90980-10171
R26Rear Inlet Air Temp. Sensor90980-1 1369
R27Rear Interior Light90980-10935
R28Rear Window Defogger90980-1 1097R29Rear Window Defogger90980-1 1097
R30Rear Wiper Motor90980-10795

2004 LAND CRUISER (EWD548U)
294Power Seat
30A
LH SEAT From Power Source System (
See Page 94)
2K 1
BM3 10
B27BN12
BN111 2
E2 B22
1 LR
LF 4
3
SLDF
Rear Fro nt
Down Up
84SLDR
23 12
Fr ont
Vertical
FUP
Down Up
10 9FDWN RCLF
Rear Fro nt
15RCLR
2 1
R- W
G
1 2
R- B
G- B
2 1
R- L
G- R
1 2
R- Y
G- Y
BJ BM3 8B27 6 LUP LDWN E B
Slide RecliningRear
Ver tical
W- B W- B W- BW- BY- R Y- R Y- R
W- B Y- RL- W
L- RL- R
L- W
P29
P25
P28
P27
L 3
P23P26 Lumbar Support Control SW
(
Driver' s Seat)
Power Seat Control SW
(
Driver' s Seat)
Power Seat Motor
(
Driver' s Seat Front
Vertical Control)
Power Seat Motor
(
Driver' s Seat Lumbar
Support Control)
Power Seat Motor
(
Driver' s Seat Rear
Vertical Control) Power Seat Motor
(
Driver' s Seat
Reclining Control) Power Seat Motor
(
Driver' s Seat
Slide Control)
MMMMM