2001 TOYOTA SEQUOIA terminal TC

I28698
Position Control ECU & Switch Assy
Wire Harness Side
Connector Front View:
M7
M6
GND
+BIG
SYSB
± DIAGNOSTICSPOWER SEAT CONTROL SYSTEM (w/ Driving Position
Memory)DI±1517
1711 Author: Date:
2005 SEQUOIA (RM1146U)
2 Inspect position control ECU & switch assy.
PREPARATION:
Disconnect the M6 and M7 ECU connectors.
CHECK:
(a) Measure the voltage of each terminal of the wire harness side connectors.
OK:
Tester Connection (Symbol)ConditionSpecified Condition
M7±5 (+B) ± Body groundAlways10 to 14 V
M6±8 (SYSB) ± Body groundAlways10 to 14 V
M6±4 (IG) ± Body groundIgnition switch OFF " ONBelow 1 V " 10 to 14 V
(b) Measure the resistance between the M7 ECU wire harness side connector and body ground.
OK:
Tester Connection (Symbol)Specified Condition
M7±1 (GND) ± Body groundBelow 1 W
NG Repair or replace harness or connector.
OK
Proceed to next circuit inspection shown in
problem symptoms table (See page
DI±1508).

I27717
± DIAGNOSTICSPOWER SEAT CONTROL SYSTEM (w/ Driving Position
Memory)DI±1519
1713 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION PROCEDURE
1 Inspect seat memory switch.
PREPARATION:
Disconnect the seat memory switch connector.
CHECK:
Measure the resistance of each terminal, as shown in the il-
lustration and table.
OK:
Tester ConnectionSwitch PositionSpecified Condition
1 ± 4SET switch OFF " ON10 kW or higher"
Below 1 W
2 ± 4Memory switch 1 OFF "
ON10 kW or higher"
Below 1 W
3 ± 4Memory switch 2 OFF "
ON10 kW or higher"
Below 1 W
NG Replace seat memory switch.
OK

I27700
B6
Body ECU Wire Harness View:
MM
M1M2
DI±1520± DIAGNOSTICSPOWER SEAT CONTROL SYSTEM (w/ Driving Position
Memory)
1714 Author: Date:
2005 SEQUOIA (RM1146U)
2 Check harness and connector (Body ECU & seat memory switch ± body ground).
PREPARATION:
(a) Reconnect the seat memory switch connector.
(b) Disconnect the B6 body ECU connector.
CHECK:
Measure the resistance of each terminal, as shown in the il-
lustration and table.
OK:
Tester Connection
(Symbol)Switch PositionSpecified Condition
B6±23 (M1) ±
Body groundMemory switch 1 OFF "
ON10 kW or higher"
Below 1 W
B6±24 (MM) ±
Body groundSET switch OFF " ON10 kW or higher"
Below 1 W
B6±22 (M2) ±
Body groundMemory switch 2 OFF "
ON10 kW or higher"
Below 1 W
NG Repair or replace harness or connector.
OK
Proceed to next circuit inspection shown in
problem symptoms table (See page
DI±1508).

I28700
HOLD (Front)RELEASE (Rear)
DI±1522± DIAGNOSTICSPOWER SEAT CONTROL SYSTEM (w/ Driving Position
Memory)
1716 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION PROCEDURE
1 Check fuse (PWR SEAT).
PREPARATION:
Remove the PWR SEAT fuse from the instrument panel J/B.
CHECK:
Measure the resistance.
OK:
Below 1 W
NG Replace fuse.
OK
2 Inspect lumbar support control switch.
PREPARATION:
Disconnect the lumbar support control switch connector.
CHECK:
Measure the resistance of each terminal, as shown in the il-
lustration and table.
OK:
Tester ConnectionSwitch PositionSpecified Condition
1 ± 2HOLD (Front)Below 1 W
3 ± 4HOLD (Front)Below 1 W
1 ± 2OFFBelow 1 W
4 ± 5OFFBelow 1 W
1 ± 3RELEASE (Rear)Below 1 W
4 ± 5RELEASE (Rear)Below 1 W
NG Replace lumbar support control switch assy
(See page BO±112).
OK

I28701
Wire Harness Side:
Lumbar Support Control Switch
L4
I28702
Lumbar Support Control Motor
Clockwise
Counter-
clockwise
Driving AxisL3
± DIAGNOSTICSPOWER SEAT CONTROL SYSTEM (w/ Driving Position
Memory)DI±1523
1717 Author: Date:
2005 SEQUOIA (RM1146U)
3 Check harness and connector (Power source).
CHECK:
Measure the voltage of each terminal of the wire harness side
connectors.
OK:
Tester ConnectionConditionSpecified Condition
L4±3 ± Body groundAlways10 to 14 V
CHECK:
Measure the resistance of each terminal, as shown in the il-
lustration and table.
OK:
Tester ConnectionConditionSpecified Condition
L4±2 ± Body groundAlwaysBelow 1 W
L4±5 ± Body groundAlwaysBelow 1 W
NG Repair or replace harness or connector.
OK
4 Inspect lumbar support control motor.
PREPARATION:
Remove the lumbar support control motor (See page BO±112).
CHECK:
Check that the motor rotates smoothly when the battery is con-
nected to the lumbar support control motor connector terminals.
OK:
Measurement ConditionOperational Direction
Battery positive (+) "1
Battery negative (±) " 2Clockwise
Battery positive (+) " 2
Battery negative (±) " 1Counterclockwise
NG Replace lumbar support control motor
(See page BO±112).
OK

I28701
Wire Harness Side:
Lumbar Support Control Switch
L4
I28555
Wire Harness Side:
Lumbar Support
Control MotorL3
DI±1524± DIAGNOSTICSPOWER SEAT CONTROL SYSTEM (w/ Driving Position
Memory)
1718 Author: Date:
2005 SEQUOIA (RM1146U)
5 Check harness and connector (Lumbar support control switch ± lumbar support
control motor).
CHECK:
Measure the resistance of each terminal, as shown in the il-
lustration and table.
OK:
Tester ConnectionConditionSpecified Condition
L4±1 ± L3±2AlwaysBelow 1 W
L4±4 ± L3±1AlwaysBelow 1 W
L4±1 ± Body groundAlways10 kW or higher
L4±4 ± Body groundAlways10 kW or higher
NG Repair or replace harness or connector.
OK
Proceed to next circuit inspection shown in
problem symptoms table (See page
DI±1508).

I07253
1 21 2
DI±1526± DIAGNOSTICSPOWER SEAT CONTROL SYSTEM (w/ Driving Position
Memory)
1720 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION PROCEDURE
1 Inspect power seat motor assy.
PREPARATION:
Remove the power seat motor (See page BO±112).
CHECK:
Check that the motor rotates smoothly when the battery is con-
nected to the connector terminal.
OK:
Tester ConnectionSpecified Condition
Battery positive voltage ± 1
Battery negative voltage ± 2Counterclockwise
Battery positive voltage ± 2
Battery negative voltage ± 1Clockwise
NG Replace power seat motor (See page BO±112).
OK

I27704
Combination Meter Wire Harness View:
C5±34C5
± DIAGNOSTICSPOWER SEAT CONTROL SYSTEM (w/ Driving Position
Memory)DI±1529
1723 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION PROCEDURE
1 Check combination meter operation.
CHECK:
Check that the ºPº indicator light in the combination meter comes on when the shift lever is moved to the
P position.
OK:
The ºPº indicator light comes on.
NG Go to combination meter system (See page
DI±1610).
OK
2 Check harness and connector (Combination meter).
PREPARATION:
Disconnect the C5 combination meter connector.
CHECK:
Measure the voltage of each terminal of the wire harness side connectors.
OK:
Tester ConnectionConditionSpecified Condition
C5±34 ± Body groundIgnition switch is in ON position and shift lever is
in P position10 to 14 V
OK Proceed to next circuit inspection shown in
problem symptom table (See page DI±1508).
NG