Front Power Seat Control System (W/ Memory) Power Seat Position Is Not Memorized


DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK FRONT POWER SEAT CONTROL FUNCTION

READ VALUE USING INTELLIGENT TESTER (SEAT POSITION MEMORY)

READ VALUE USING INTELLIGENT TESTER (SEAT MEMORY SWITCH)

CHECK FRONT POWER SEAT SWITCH (OPERATION)

INSPECT SEAT MEMORY SWITCH

CHECK HARNESS AND CONNECTOR (SEAT MEMORY SWITCH - MAIN BODY ECU AND BODY GROUND)

FRONT POWER SEAT CONTROL SYSTEM (w/ Memory) - Power Seat Position is not Memorized


DESCRIPTION

When the seat memory SET switch and a memory switch (M1 or M2) are pressed simultaneously, the main body ECU commands the position control ECU through CAN communication to record the value of each position sensor.

WIRING DIAGRAM


Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Seat.Front Power Seat Control System (W/ Memory).Front Power Seat Control System (W/ Memory) Power Seat Position Is Not Memorized


INSPECTION PROCEDURE

NOTICE:
First perform the communication function inspections in How to Proceed with Troubleshooting to confirm that there are no CAN communication malfunctions before troubleshooting this symptom.
1.CHECK FRONT POWER SEAT CONTROL FUNCTION

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

    OK:
    Each function of power seat operates normally by using seat switches.


NG
GO TO PROBLEM SYMPTOMS TABLE (LandCruiser RM0000039RM056X.html)
OK


2.READ VALUE USING INTELLIGENT TESTER (SEAT POSITION MEMORY)

  1. Use the seat memory switch to record the seat position (LandCruiser RM000003S3I01LX.html).

    NOTICE:
    1. The seat position will not be recorded if the SET switch and both memory switches are pressed simultaneously.
    2. If a memorizing operation has failed, release all switches. The seat memory function does not operate unless the switches are released.

  1. Using the intelligent tester, read the Data List (LandCruiser RM0000039RN030X.html).

    Driver Seat
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    Seat Memory No1
    		Seat position memorized with M1 switch / Mem or Not Mem
    		Mem: Memorized
    Not Mem: Not memorized
    		-
    Seat Memory No2
    		Seat position memorized with M2 switch / Mem or Not Mem
    		Mem: Memorized
    Not Mem: Not memorized
    		-
    OK:
    "Mem" is displayed on the tester.


NG
Go to step 3
OK

END

3.READ VALUE USING INTELLIGENT TESTER (SEAT MEMORY SWITCH)

  1. Using the intelligent tester, read the Data List (LandCruiser RM0000039RN030X.html).

    Main Body
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    M1 Switch
    		Seat memory switch M1 signal / ON or OFF
    		ON: Seat memory switch M1 on
    OFF: Seat memory switch M1 off
    		-
    M2 Switch
    		Seat memory switch M2 signal / ON or OFF
    		ON: Seat memory switch M2 on
    OFF: Seat memory switch M2 off
    		-
    SET Switch
    		Seat memory switch SET signal / ON or OFF
    		ON: Seat memory switch SET on
    OFF: Seat memory switch SET off
    		-
    OK:
    On intelligent tester screen, each item changes between ON and OFF according to above chart.


NG
Go to step 5
OK


4.CHECK FRONT POWER SEAT SWITCH (OPERATION)

  1. Replace the front power seat switch with a new one or normally operating one.

  1. Use the seat memory switch to record the seat position (LandCruiser RM000003S3I01LX.html).

  1. Refer to the Data List for the driver seat and check that the memory operation is completed normally.

    OK:
    Seat position is recorded normally.


NG
REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) (LandCruiser RM000003WBO05FX.html)
OK

END (FRONT POWER SEAT SWITCH WAS DEFECTIVE)

5.INSPECT SEAT MEMORY SWITCH


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Seat.Front Power Seat Control System (W/ Memory).Front Power Seat Control System (W/ Memory) Power Seat Position Is Not Memorized

  1. Remove the seat memory switch (LandCruiser RM00000472N00HX.html).

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

    Standard Resistance:
    Tester Connection
    		Switch Condition
    		Specified Condition
    3 (M1) - 1 (E)
    		Seat memory switch M1 pressed
    		Below 1 Ω
    4 (M2) - 1 (E)
    		Seat memory switch M2 pressed
    		Below 1 Ω
    2 (MRY) - 1 (E)
    		Seat memory switch SET pressed
    		Below 1 Ω


NG
REPLACE SEAT MEMORY SWITCH (LandCruiser RM00000472P00QX.html)
OK


6.CHECK HARNESS AND CONNECTOR (SEAT MEMORY SWITCH - MAIN BODY ECU AND BODY GROUND)

  1. Disconnect the K9*1 or J10*2 switch connector.

    1. *1: for LHD
    2. *2: for RHD

  1. Disconnect the G63 ECU connector.

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

    Standard Resistance:
    for LHD
    Tester Connection
    		Condition
    		Specified Condition
    G63-25 (M1) - K9-3 (M1)
    		Always
    		Below 1 Ω
    G63-27 (M2) - K9-4 (M2)
    		Always
    		Below 1 Ω
    G63-26 (MM) - K9-2 (MRY)
    		Always
    		Below 1 Ω
    K9-1 (E) - Body ground
    		Always
    		Below 1 Ω
    G63-25 (M1) - Body ground
    		Always
    		10 kΩ or higher
    G63-27 (M2) - Body ground
    		Always
    		10 kΩ or higher
    G63-26 (MM) - Body ground
    		Always
    		10 kΩ or higher
    for RHD
    Tester Connection
    		Condition
    		Specified Condition
    G63-25 (M1) - J10-3 (M1)
    		Always
    		Below 1 Ω
    G63-27 (M2) - J10-4 (M2)
    		Always
    		Below 1 Ω
    G63-26 (MM) - J10-2 (MRY)
    		Always
    		Below 1 Ω
    J10-1 (E) - Body ground
    		Always
    		Below 1 Ω
    G63-25 (M1) - Body ground
    		Always
    		10 kΩ or higher
    G63-27 (M2) - Body ground
    		Always
    		10 kΩ or higher
    G63-26 (MM) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) (LandCruiser RM000003WBO05FX.html)