Lexus LS400 (2000 year). Manual — part 23
Z14969
2
1
–
+
2
1
–
+
(a)
(b)
Z14970
2
1
Z07887
N07798
2
1
–
+
BE–174
–
BODY ELECTRICAL
POWER SEAT CONTROL SYSTEM (w/o Driving
Position Memory)
2037
7.
INSPECT FRONT VERTICAL MOTOR OPERATION
(a)
Connect the positive (+) lead from the battery to terminal
2 and the negative (–) lead to terminal 1 and check that
the motor turns clockwise.
(b)
Reverse the polarity and check that the motor turns coun-
terclockwise.
If operation is not as specified, replace the motor.
8.
Driver’s Seat:
INSPECT FRONT VERTICAL MOTOR PTC THERM-
ISTOR OPERATION
(a)
Connect the positive (+) lead from the battery to terminal
1, the positive (+) lead from the ammeter to terminal 2 and
the negative (–) lead to battery negative (–) terminal, then
move the front edge of seat cushion to the highest posi-
tion.
(b)
Continue to apply voltage, and check the current changes
to less than 1 ampere with 4 to 90 seconds.
(c)
Disconnect the leads from terminals.
(d)
Approximately 60 seconds later, connect the positive (+)
lead from battery to terminal 2 and the negative (–) lead
to terminal 1, and check that the seat cushion begins to
descend.
If operation is not as specified, replace the motor.
9.
INSPECT REAR VERTICAL MOTOR OPERATION
(a)
Connect the positive (+) lead from the battery to terminal
2 and the negative (–) lead to terminal 1, and check that
the motor turns clockwise.
(b)
Reverse the polarity, and check that the motor turns coun-
terclockwise.
If operation is not as specified, replace the motor.
Z14971
2
1
–
+
Z07469
2
1
–
+
Z14969
2
1
–
+
2
1
–
+
(a)
(b)
Z14973
2
1
–
+
–
+
–
BODY ELECTRICAL
POWER SEAT CONTROL SYSTEM (w/o Driving
Position Memory)
BE–175
2038
10.
Driver’s seat:
INSPECT REAR VERTICAL MOTOR PTC THERM-
ISTOR OPERATION
(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 battery negative (–) terminal, then
move the rear edge of seat cushion to the highest posi-
tion.
(b)
Continue to apply voltage, and check that the current
changes to less than 1 ampere with 4 to 90 seconds.
(c)
Disconnect the leads from terminals.
(d)
Approximately 60 seconds later, connect the positive (+)
lead from battery to terminal 1 and the negative (–) lead
to terminal 2, and check that the seat cushion begins to
descend.
If operation is not as specified, replace the motor.
11.
Driver’s Seat:
INSPECT RECLINING MOTOR OPERATION
(a)
Connect the positive (+) lead from the battery to terminal
2 and the negative (–) lead to terminal 1, and check that
the motor turns counterclockwise.
(b)
Reverse the polarity, and check that the motor turns
clockwise.
If operation is not as specified, replace the motor.
12.
Driver’s Seat:
INSPECT RECLINING MOTOR PTC THERMISTOR OP-
ERATION
(a)
Connect the positive (+) lead from the battery to terminal
1, the positive (+) lead from the ammeter to terminal 2 and
the negative (–) lead to battery negative (–) terminal, then
recline the seat back to the most forward position.
(b)
Continue to apply voltage, and check that the current
change to less than 1 ampere with 4 to 90 seconds.
Z07474
2
1
–
+
N21675
2
1
N21676
2
1
N13487
2
1
N13488
2
1
BE–176
–
BODY ELECTRICAL
POWER SEAT CONTROL SYSTEM (w/o Driving
Position Memory)
2039
(c)
Disconnect the lead from terminals.
(d)
Approximately 60 seconds later, connect the positive (+)
lead from battery to terminal 2 and the negative (–) lead
to terminal 1, check that the seat back starts to fall back-
wards.
If operation is not as specified, replace the motor.
13.
INSPECT LUMBAR SUPPORT MOTOR OPERATION
(a)
Connect the positive (+) lead from the battery to terminal
1 and the negative (–) lead to terminal 2, and check that
the lumbar support moves release side.
(b)
Reverse the polarity, and check that the lumbar support
moves forward.
If operation is not as specified, replace the motor.
14.
Driver’s Seat:
INSPECT LUMBAR SUPPORT MOTOR PTC THERM-
ISTOR OPERATION
(a)
Connect the positive (+) lead from the battery to terminal
1, the positive (+) lead from the ammeter to terminal 2 and
the negative (–) lead to battery negative (–) terminal, then
move the front edge of seat cushion to the highest posi-
tion.
(b)
Continue to apply voltage, and check that the current
changes to less than 1 ampere with 4 to 90 seconds.
(c)
Disconnect the leads from terminals.
(d)
Approximately 60 seconds later, connect the positive (+)
lead from battery to terminal 2 and the negative (–) lead
to terminal 1, and check that the seat cushion begins to
descend.
If operation is not as specified, replace the motor.
I09308
UP
FRONT
REAR
DOWN
REAR
FRONT
Connector ”A”
Connector ”B”
–
BODY ELECTRICAL
POWER SEAT CONTROL SYSTEM (w/o Driving
Position Memory)
BE–177
2040
15.
Taiwan Models Only:
INSPECT REAR POWER SEAT SWITCH CONTINUITY
Slide switch LH:
Switch position
Tester connection
Specified condition
FRONT
B1 – B5
B5 – B7
Continuity
OFF
B1 – B7
B5 – B7
Continuity
REAR
B1 – B7
B5 – B6
Continuity
Slide switch RH:
Switch position
Tester connection
Specified condition
FRONT
B4 – B6
B9 – B7
Continuity
OFF
B4 – B7
B7 – B10
Continuity
REAR
B4 – B7
B7 – B10
Continuity
Headrest switch LH (for vertical):
Switch position
Tester connection
Specified condition
UP
B2 – B6
B7 – B8
Continuity
OFF
B2 – B7
B7 – B8
Continuity
DOWN
B2 – B7
B6 – B8
Continuity
Headrest switch RH (for vertical):
Switch position
Tester connection
Specified condition
UP
B3 – B6
B7 – B9
Continuity
OFF
B3 – B7
B7 – B9
Continuity
DOWN
B3 – B7
B6 – B9
Continuity
Headrest switch LH (for turning)
Switch position
Tester connection
Specified condition
FRONT
A4 –B7
Continuity
OFF
–
No continuity
REAR
A5 –B7
Continuity
Headrest switch RH (for turning)
Switch position
Tester connection
Specified condition
FRONT
A4 –B7
Continuity
OFF
–
No continuity
REAR
A5 –B7
Continuity
If continuity is not as specified, replace the switch.
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