2001 TOYOTA AVALON lumbar support

I05472
Wire Harness Side
I04161
RELEASE FORWARD
- BODY ELECTRICALPOWER SEAT CONTROL SYSTEM (w/o Driving
Position Memory)BE-107
1711 Author
: Date
:
2001 AVALON (RM808U)
Reclining switch:
Switch positionTester connectionSpecified condition
FORWARD1 - 3
2 - 4Continuity
OFF2 - 4
3 - 4Continuity
REAR1 - 2
3 - 4Continuity
If continuity is not as specified, replace the switch.
4. INSPECT PASSENGER'S POWER SEAT SWITCH CIR-
CUIT
(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
4 - GroundConstantContinuity
1 - GroundConstantBattery positive voltage
If circuit is not as specified, inspect the circuits connected to oth-
er parts.
5. INSPECT DRIVER'S LUMBAR SUPPORT SWITCH
CONTINUITY
Switch positionTester connectionSpecified condition
FORWARD1 - 4
2 - 3Continuity
OFF1 - 3
2 - 3Continuity
RELEASE1 - 3
2 - 4Continuity
If continuity is not as specified, replace the switch.

I04162
Wire Harness Side
I04161
RELEASE FORWARD
I04162
Wire Harness Side BE-108
- BODY ELECTRICALPOWER SEAT CONTROL SYSTEM (w/o Driving
Position Memory)
1712 Author
: Date
:
2001 AVALON (RM808U)
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 PASSENGER'S LUMBAR SUPPORT
SWITCH CONTINUITY
Switch positionTester connectionSpecified condition
FORWARD1 - 4
2 - 3Continuity
OFF1 - 3
2 - 3Continuity
RELEASE1 - 3
2 - 4Continuity
If continuity is not as specified, replace the switch.
8. INSPECT PASSENGER'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
2 - GroundConstantContinuity
1 - GroundConstantBattery positive voltage
If circuit is not as specified, inspect the circuits connected to oth-
er parts.

N21868
21
N21869
21
I13315
1
2
I13316
1
2
I13317
2 1
- BODY ELECTRICALPOWER SEAT CONTROL SYSTEM (w/o Driving
Position Memory)BE-1 11
1715 Author
: Date
:
2001 AVALON (RM808U)
16. INSPECT RECLINING MOTOR PTC THERMISTOR OP-
ERATION
(a) Connect the positive (+) lead from the battery to terminal
2, the positive (+) lead from the ammeter to terminal 1 and
the negative (-) lead to the battery negative (-) terminal,
then recline the seat back to the most forward position.
(b) Continue to apply voltage, check that the current changes
to less than 1 ampere within 4 to 90 seconds.
(c) Disconnect the leads from the terminals.
(d) Approximately 60 seconds later, connect the positive (+)
lead from the battery to terminal 1 and the negative (-)
lead to terminal 2, check that the seat back begins to fall
backward.
If operation is not as specified, replace the seat adjuster.
17. 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.
18. 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.

I13318
21
BE-1 12- BODY ELECTRICALPOWER SEAT CONTROL SYSTEM (w/o Driving
Position Memory)
1716 Author
: Date
:
2001 AVALON (RM808U)
(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 release side with in spproximately 60 se-
conds.
If operation is not as specified, replace the motor.

BO2Q2-01
H12211

Hog Ring Separate type:
Seatback Cover

Hog Ring
Seatback Frame
w/ Lumbar support:
Lumbar Support Assembly
Reclining Adjuster
Inside Cover
Seat Track
Cover
Sliding Motor Seat Track Cover
Front Power
Adjuster ShieldSeatback Pad
Headrest Support
Headrest
Seatback Board
Seat Cushion
Frame
Seat Wire
w/ Power seat control:
Power Seat Position
Control Computer
Seat Cushion
CoverSeat Cushion
Pad
Seat Cushion
Inner Shield
Front Seat Inner Belt
w/ Lumbar support:
Lumbar Support Switch Power Seat Switch
Slide Motor
w/ 4 way-vertical:
Front Vertical Motor
w/ Power seat control:
Seat Memory SwitchSeat Cushion
Shield
Power Seat
Switch Knob
Rear Vertical Motor
N´m (kgf´cm, ft´lbf): Specified torque

Non-reusable part
18 (185, 13)
43 (440, 32)
37 (375, 27)
37 (375, 27)
37 (375, 27)
41 (420, 30)
- BODYFRONT SEAT (Power Adjuster Type)
BO-103
1888 Author
: Date
:
2001 AVALON (RM808U)
FRONT SEAT (Power Adjuster Type)
COMPONENTS

BO2Q4-01
H12693A
H12203
H12204
BO-106
- BODYFRONT SEAT (Power Adjuster Type)
1891 Author
: Date
:
2001 AVALON (RM808U)
DISASSEMBLY
CAUTION:

When storing the seatback frame with the side airbag
assembly, do not face down the airbag deployment
side.

Never disassemble the side airbag assembly.
1. Bench type: Driver's seat
REMOVE CENTER ARMREST
2. REMOVE HEADREST
3. REMOVE SEATBACK BOARD
Remove the seatback board.
HINT:
Insert your hand between the upper part of the seatback board
and seat cushion, and press ºAº of the clips to remove the clips
from the frame wire.
4. REMOVE SEAT CUSHION SHIELD
(a) Using a screwdriver, remove the power seat switch
knobs.
HINT:
Tape the screwdriver tip before use.
(b) Remove the 5 screws.
(c) Remove the seat cushion shield as shown in the illustra-
tion, then disconnect the connectors.
(d) w/ Lumbar support:
Remove the 2 screws and lumbar support switch from the
seat cushion shield.
(e) w/ Power seat control:
Remove the 2 screws and seat memory switch from the
seat cushion shield.
5. REMOVE SEAT CUSHION LOWER SHIELD
Remove the screw and seat cushion lower shield as shown in
the illustration.

H12208
LH side:
RH side:
Lumber Support
Wire HarnessSide Airbag
Wire Harness
H12209
BO-108
- BODYFRONT SEAT (Power Adjuster Type)
1893 Author
: Date
:
2001 AVALON (RM808U)
14. REMOVE RECLINING ADJUSTER INSIDE COVERS
Remove the 4 screws and reclining adjuster inside covers.
15. REMOVE SEATBACK FRAME
Torque: 41 N´m (420 kgf´cm, 30 ft´lbf)
16. w/ Lumbar support:
REMOVE LUMBAR SUPPORT ASSEMBLY
17. REMOVE SLIDE MOTOR
(a) Remove the 2 screws, then disconnect the drive cable.
(b) Remove the slide motor from the power seat adjuster.
18. w/ 4 way-vertical:
REMOVE FRONT VERTICAL MOTOR
19. REMOVE REAR VERTICAL MOTOR
20. REMOVE RECLINING MOTOR

DI0FT-05
I12537Front Vertical MotorEngine Room Junction Block

ECU-B NO. 1 Fuse
Instrument Panel Junction Block

PWR SEAT M-Fuse
Reclining Motor
Power Seat Control ECU
Rear Vertical
Motor
Slide MotorLumbar Support Switch
Seat Memory Switch
Power Seat Control Switch DI-490
- DIAGNOSTICSPOWER SEAT CONTROL SYSTEM (w/ Driving Position
Memory)
646 Author
: Date
:
2001 AVALON (RM808U)
PARTS LOCATION