Seat. Rear Power Seat Control System Folding Motor Circuit

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

INSPECT SEAT LEG ASSEMBLY

CHECK HARNESS AND CONNECTOR (FOLD SEAT CONTROL ECU - NO. 3 SEAT LEG)

CHECK FOLD SEAT CONTROL ECU LH

CHECK HARNESS AND CONNECTOR (FOLD SEAT CONTROL ECU - NO. 2 SEAT LEG)

CHECK FOLD SEAT CONTROL ECU RH

REAR POWER SEAT CONTROL SYSTEM - Folding Motor Circuit

DESCRIPTION

The fold seat control ECU receives switch operation signals from the No. 1 and No. 2 fold seat switches and activates the power seat motors. At this time, the Hall IC detects the actuation of the seat cushion and sends a seat cushion actuation signal to the fold seat control ECU. The fold seat control ECU uses signals from the Hall IC to detect if an object is caught or if any other abnormal condition has occurred.

WIRING DIAGRAM

Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Seat.Front Power Seat Control System (W/ Memory).Rear Power Seat Control System Folding Motor Circuit

INSPECTION PROCEDURE

1.INSPECT SEAT LEG ASSEMBLY

for LH Side:
1. Remove the No. 3 seat leg assembly LH (LandCruiser RM0000045DH00EX.html).
2. Check if the No. 3 seat leg moves smoothly when the battery is connected to the cushion motor connector terminals.

for RH Side:
1. Remove the rear No. 2 seat assembly (LandCruiser RM0000045DH00EX.html).
2. Check if the No. 2 seat leg moves smoothly when the battery is connected to the cushion motor connector terminals.
  OK:
  Measurement Condition
  Specified Condition
  Battery positive (+) → 3 (FWD)
  Battery negative (-) → 4 (BACK)
  Forward
  Battery positive (+) → 4 (BACK)
  Battery negative (-) → 3 (FWD)
  Backward
  Result
  Result
  Proceed to
  OK (for LH Side)
  A
  OK (for RH Side)
  B
  NG (for LH Side)
  C
  NG (for RH Side)
  D

Result
Result	Proceed to
OK (for LH Side)	A
OK (for RH Side)	B
NG (for LH Side)	C
NG (for RH Side)	D

Go to step 4

REPLACE NO. 3 SEAT LEG ASSEMBLY LH (LandCruiser RM0000045DH00EX.html)

REPLACE NO. 2 SEAT LEG ASSEMBLY (LandCruiser RM0000045DH00EX.html)

A

2.CHECK HARNESS AND CONNECTOR (FOLD SEAT CONTROL ECU - NO. 3 SEAT LEG)

Disconnect the d2 and d1 ECU connectors.

Disconnect the d4 No. 3 seat leg connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
d1-17 (SV1) - d4-5 (HLV)	Always	Below 1 Ω
d1-17 (SV1) - Body ground	Always	10 kΩ or higher
d1-18 (SFLD) - d4-2 (HLS)	Always	Below 1 Ω
d1-18 (SFLD) - Body ground	Always	10 kΩ or higher
d1-25 (SG1) - d4-6 (HLG)	Always	Below 1 Ω
d1-25 (SG1) - Body ground	Always	10 kΩ or higher
d2-8 (FLD+) - d4-3 (FWD)	Always	Below 1 Ω
d2-8 (FLD+) - Body ground	Always	10 kΩ or higher
d2-7 (FLD-) - d4-4 (BACK)	Always	Below 1 Ω
d2-7 (FLD-) - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

3.CHECK FOLD SEAT CONTROL ECU LH

Remove the fold seat control ECU LH with its connectors still connected (LandCruiser RM0000045DH00EX.html).

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

Standard Voltage:

Tester Connection	Condition	Specified Condition
d1-17 (SV1) - d1-25 (SG1)	Ignition switch off	Below 1 V
d1-17 (SV1) - d1-25 (SG1)	Ignition switch ON	5.5 to 8 V
d1-18 (SFLD) - d1-25 (SG1)	Motor is operating	Pulse generation
d2-8 (FLD+) - Body ground	No. 1 or No. 2 fold seat switch LH fold	11 to 14 V
d2-7 (FLD-) - Body ground	No. 1 or No. 2 fold seat switch LH return	11 to 14 V

Text in Illustration
*a	Component with harness connected (Fold Seat Control ECU LH)