Seat. Front Power Seat Control System (W/ Seat Position Memory System) One Or More Power Seat Motors Do Not Operate

Vehicle Interior. Land Cruiser. Urj200, 202 Grj200 Vdj200

Seat. Land Cruiser. Urj200, 202 Grj200 Vdj200

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK FRONT POWER SEAT OPERATION

READ VALUE USING INTELLIGENT TESTER (FRONT POWER SEAT SWITCH)

PERFORM ACTIVE TEST USING INTELLIGENT TESTER (FRONT POWER SEAT MOTOR)

INSPECT FRONT SEAT ASSEMBLY (FRONT POWER SEAT MOTOR)

CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU AND SWITCH - POWER SEAT MOTOR)

INSPECT LUMBAR SUPPORT SWITCH

INSPECT LUMBAR SUPPORT ADJUSTER ASSEMBLY

CHECK HARNESS AND CONNECTOR (LUMBAR SUPPORT SWITCH - BATTERY AND BODY GROUND)

FRONT POWER SEAT CONTROL SYSTEM (w/ Seat Position Memory System) - One or more Power Seat Motors do not Operate

DESCRIPTION

When the front power seat switch is operated, a command signal is sent to the position control ECU. The position control ECU then controls the appropriate seat motor as needed. The position control ECU is designed so that a malfunction of the seat memory system will not interfere with manual seat control.

WIRING DIAGRAM

Land Cruiser. Urj200, 202 Grj200 Vdj200.Seat.Front Power Seat Control System (W/ Seat Position Memory System).Front Power Seat Control System (W/ Seat Position Memory System) One Or More Power Seat Motors Do Not Operate

INSPECTION PROCEDURE

1.CHECK FRONT POWER SEAT OPERATION

Check that each function of the power seat operates normally by using the front power seat switches.

Result
Result
Proceed to
All front power seat switch operations are malfunctioning except lumbar support switch operation
A
Only lumbar support switch operation is malfunctioning
B

Go to step 6

A

2.READ VALUE USING INTELLIGENT TESTER (FRONT POWER SEAT SWITCH)

Using the intelligent tester, read the Data List.

Driver Seat
Item	Measurement Item/Display (Range)	Normal Condition	Diagnostic Note
Reclining Rear	Reclining switch signal (Rearward) / ON or OFF	ON: Reclining switch (Rearward) on OFF: Reclining switch (Rearward) off	-
Reclining Front	Reclining switch signal (Forward) / ON or OFF	ON: Reclining switch (Forward) on OFF: Reclining switch (Forward) off	-
Front Vertical Down	Front vertical switch signal (Downward) / ON or OFF	ON: Front vertical switch (Downward) on OFF: Front vertical switch (Downward) off	-
Front Vertical Up	Front vertical switch signal (Upward) / ON or OFF	ON: Front vertical switch (Upward) on OFF: Front vertical switch (Upward) off	-
Lifter Switch Down	Lifter switch signal (Downward) / ON or OFF	ON: Lifter switch (Downward) on OFF: Lifter switch (Downward) off	-
Lifter Switch Up	Lifter switch signal (Upward) / ON or OFF	ON: Lifter switch (Upward) on OFF: Lifter switch (Upward) off	-
Slide Rear	Sliding switch signal (Rearward) / ON or OFF	ON: Sliding switch (Rearward) on OFF: Sliding switch (Rearward) off	-
Slide Front	Sliding switch signal (Forward) / ON or OFF	ON: Sliding switch (Forward) on OFF: Sliding switch (Forward) off	-

OK:: On intelligent tester screen, each item changes between ON and OFF according to above chart.

REPLACE POSITION CONTROL ECU AND SWITCH (Click here)

OK

3.PERFORM ACTIVE TEST USING INTELLIGENT TESTER (FRONT POWER SEAT MOTOR)

Using the intelligent tester, perform the Active Test.

Driver Seat
Tester Display	Test Part	Control Range	Diagnostic Note
Seat Reclining	Seat reclining operation	Front / OFF / Rear	-
Front Vertical Operation	Seat front vertical operation	Up / OFF / Down	-
Lifter Operation	Seat lifter operation	Up / OFF / Down	-
Seat Slide Operation	Seat sliding operation	Front / OFF / Rear	-

OK:: The power seat motors operate normally.

Go to step 4

REPLACE POSITION CONTROL ECU AND SWITCH (Click here)

4.INSPECT FRONT SEAT ASSEMBLY (FRONT POWER SEAT MOTOR)

Remove the front seat assembly LH (for LHD) (Click here).

Remove the front seat assembly RH (for RHD) (Click here).

Check operation of the slide motor.
1. Check if the seat moves smoothly when the battery is connected to the slide motor connector terminals.
  
  OK:
  for LHD
  Measurement Condition
  Specified Condition
  Battery positive (+) → 1
  Battery negative (-) → 2
  Forward
  Battery positive (+) → 2
  Battery negative (-) → 1
  Rearward
  for RHD
  Measurement Condition
  Specified Condition
  Battery positive (+) → 2
  Battery negative (-) → 1
  Forward
  Battery positive (+) → 1
  Battery negative (-) → 2
  Rearward

for LHD
Measurement Condition	Specified Condition
Battery positive (+) → 1 Battery negative (-) → 2	Forward
Battery positive (+) → 2 Battery negative (-) → 1	Rearward

for RHD
Measurement Condition	Specified Condition
Battery positive (+) → 2 Battery negative (-) → 1	Forward
Battery positive (+) → 1 Battery negative (-) → 2	Rearward

Check operation of the front vertical motor.
1. Check if the seat moves smoothly when the battery is connected to the front vertical motor connector terminals.
  
  OK:
  for LHD
  Measurement Condition
  Specified Condition
  Battery positive (+) → 1
  Battery negative (-) → 2
  Upward
  Battery positive (+) → 2
  Battery negative (-) → 1
  Downward
  for RHD
  Measurement Condition
  Specified Condition
  Battery positive (+) → 2
  Battery negative (-) → 1
  Upward
  Battery positive (+) → 1
  Battery negative (-) → 2
  Downward

for LHD
Measurement Condition	Specified Condition
Battery positive (+) → 1 Battery negative (-) → 2	Upward
Battery positive (+) → 2 Battery negative (-) → 1	Downward

for RHD
Measurement Condition	Specified Condition
Battery positive (+) → 2 Battery negative (-) → 1	Upward
Battery positive (+) → 1 Battery negative (-) → 2	Downward

Check operation of the lifter motor.
1. Check if the seat moves smoothly when the battery is connected to the lifter motor connector terminals.
  
  OK:
  for LHD
  Measurement Condition
  Specified Condition
  Battery positive (+) → 2
  Battery negative (-) → 1
  Upward
  Battery positive (+) → 1
  Battery negative (-) → 2
  Downward
  for RHD
  Measurement Condition
  Specified Condition
  Battery positive (+) → 1
  Battery negative (-) → 2
  Upward
  Battery positive (+) → 2
  Battery negative (-) → 1
  Downward

for LHD
Measurement Condition	Specified Condition
Battery positive (+) → 2 Battery negative (-) → 1	Upward
Battery positive (+) → 1 Battery negative (-) → 2	Downward

for RHD
Measurement Condition	Specified Condition
Battery positive (+) → 1 Battery negative (-) → 2	Upward
Battery positive (+) → 2 Battery negative (-) → 1	Downward

Check operation of the reclining motor.
1. Check if the seat moves smoothly when the battery is connected to the reclining motor connector terminals.
  OK:
  Measurement Condition
  Specified Condition
  Battery positive (+) → 2
  Battery negative (-) → 1
  Forward
  Battery positive (+) → 1
  Battery negative (-) → 2
  Rearward

Result
Result	Proceed to
OK	A
NG (for LHD)	B
NG (for RHD)	C

REPLACE FRONT SEAT ASSEMBLY LH (Click here)

REPLACE FRONT SEAT ASSEMBLY RH

A

5.CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU AND SWITCH - POWER SEAT MOTOR)

Disconnect the c14*1 or c26*2 switch connector.

Disconnect the c17*1, c18*1, c19*1, c20*1 or c3*2, c4*2, c5*2, c6*2 motor connectors.
HINT:
*1: for LHD
*2: for RHD

Measure the resistance according to the value(s) in the table below.

Standard Resistance:

for LHD
Tester Connection	Condition	Specified Condition
c14-3 (SLD-) - c17-2	Always	Below 1 Ω
c14-2 (SLD+) - c17-1	Always	Below 1 Ω
c14-4 (FRV-) - c19-2	Always	Below 1 Ω
c14-6 (FRV+) - c19-1	Always	Below 1 Ω
c14-9 (LFT-) - c18-1	Always	Below 1 Ω
c14-7 (LFT+) - c18-2	Always	Below 1 Ω
c14-10 (RCL-) - c20-1	Always	Below 1 Ω
c14-8 (RCL+) - c20-2	Always	Below 1 Ω
c14-1 (GND) - Body ground	Always	Below 1 Ω
c14-3 (SLD-) or c17-2 - Body ground	Always	10 kΩ or higher
c14-2 (SLD+) or c17-1 - Body ground	Always	10 kΩ or higher
c14-4 (FRV-) or c19-2 - Body ground	Always	10 kΩ or higher
c14-6 (FRV+) or c19-1 - Body ground	Always	10 kΩ or higher
c14-9 (LFT-) or c18-1 - Body ground	Always	10 kΩ or higher
c14-7 (LFT+) or c18-2 - Body ground	Always	10 kΩ or higher
c14-10 (RCL-) or c20-1 - Body ground	Always	10 kΩ or higher
c14-8 (RCL+) or c20-2 - Body ground	Always	10 kΩ or higher

for RHD
Tester Connection	Condition	Specified Condition
c26-3 (SLD-) - c3-1	Always	Below 1 Ω
c26-2 (SLD+) - c3-2	Always	Below 1 Ω
c26-4 (FRV-) - c5-1	Always	Below 1 Ω
c26-6 (FRV+) - c5-2	Always	Below 1 Ω
c26-9 (LFT-) - c4-2	Always	Below 1 Ω
c26-7 (LFT+) - c4-1	Always	Below 1 Ω
c26-10 (RCL-) - c6-1	Always	Below 1 Ω
c26-8 (RCL+) - c6-2	Always	Below 1 Ω
c26-1 (GND) - Body ground	Always	Below 1 Ω
c26-3 (SLD-) or c3-1 - Body ground	Always	10 kΩ or higher
c26-2 (SLD+) or c3-2 - Body ground	Always	10 kΩ or higher
c26-4 (FRV-) or c5-1 - Body ground	Always	10 kΩ or higher
c26-6 (FRV+) or c5-2 - Body ground	Always	10 kΩ or higher
c26-9 (LFT-) or c4-2 - Body ground	Always	10 kΩ or higher
c26-7 (LFT+) or c4-1 - Body ground	Always	10 kΩ or higher
c26-10 (RCL-) or c6-1 - Body ground	Always	10 kΩ or higher
c26-8 (RCL+) or c6-2 - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

REPLACE POSITION CONTROL ECU AND SWITCH (Click here)

6.INSPECT LUMBAR SUPPORT SWITCH

Remove the lumbar support switch (Click here).

Measure the resistance according to the value(s) in the table below.

Standard Resistance:
for LHD
Tester Connection
Switch Condition
Specified Condition
3 (B) - 4 (H)
Hold
Below 1 Ω
1 (R) - 2 (E2)
4 (H) - 5 (E2)
Off
1 (R) - 2 (E2)
4 (H) - 5 (E2)
Release
1 (R) - 3 (B)
for RHD
Tester Connection
Switch Condition
Specified Condition
3 (B) - 4 (H)
Hold
Below 1 Ω
1 (R) - 2 (E)
4 (H) - 5 (E)
Off
1 (R) - 2 (E)
4 (H) - 5 (E)
Release
1 (R) - 3 (B)

REPLACE LUMBAR SUPPORT SWITCH (Click here)

OK

7.INSPECT LUMBAR SUPPORT ADJUSTER ASSEMBLY

Remove the lumbar support adjuster (Click here).

Check operation of the lumbar support adjuster.
1. Check that the lumbar support adjuster moves smoothly when the battery is connected to the lumbar support adjuster motor connector terminals.
  
  OK:
  for LHD
  Measurement Condition
  Specified Condition
  Battery positive (+) → 1
  Battery negative (-) → 2
  Clockwise
  Battery positive (+) → 2
  Battery negative (-) → 1
  Counterclockwise
  for RHD
  Measurement Condition
  Specified Condition
  Battery positive (+) → 2
  Battery negative (-) → 1
  Clockwise
  Battery positive (+) → 1
  Battery negative (-) → 2
  Counterclockwise

REPLACE LUMBAR SUPPORT ADJUSTER ASSEMBLY (Click here)

OK

8.CHECK HARNESS AND CONNECTOR (LUMBAR SUPPORT SWITCH - BATTERY AND BODY GROUND)

Disconnect the c16*1 or c28*2 switch connector.
HINT:
*1: for LHD
*2: for RHD

Measure the voltage according to the value(s) in the table below.

Standard Voltage:
for LHD
Tester Connection
Condition
Specified Condition
c16-3 (B) - Body ground
Always
11 to 14 V
for RHD
Tester Connection
Condition
Specified Condition
c28-3 (B) - Body ground
Always
11 to 14 V

Measure the resistance according to the value(s) in the table below.

Standard Resistance:
for LHD
Tester Connection
Condition
Specified Condition
c16-5 (E2) - Body ground
Always
Below 1 Ω
c16-2 (E2) - Body ground
for RHD
Tester Connection
Condition
Specified Condition
c28-5 (E) - Body ground
Always
Below 1 Ω
c28-2 (E) - Body ground

REPAIR OR REPLACE HARNESS OR CONNECTOR

REPAIR OR REPLACE HARNESS OR CONNECTOR (LUMBAR SUPPORT SWITCH - LUMBAR SUPPORT ADJUSTER ASSEMBLY)

Result	Proceed to
All front power seat switch operations are malfunctioning except lumbar support switch operation	A
Only lumbar support switch operation is malfunctioning	B

Tester Connection	Switch Condition	Specified Condition
3 (B) - 4 (H)	Hold	Below 1 Ω
1 (R) - 2 (E2)
4 (H) - 5 (E2)	Off
1 (R) - 2 (E2)
4 (H) - 5 (E2)	Release
1 (R) - 3 (B)