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

Vehicle Interior. Land Cruiser. Urj200, 202 Grj200 Vdj200
Seat. Land Cruiser. Urj200, 202 Grj200 Vdj200

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK FRONT POWER SEAT CONTROL FUNCTION

CHECK SEAT MEMORY SWITCH FUNCTION

CHECK COMBINATION METER FUNCTION

READ VALUE USING INTELLIGENT TESTER (SEAT MEMORY SWITCH)

INSPECT SEAT MEMORY SWITCH

CHECK HARNESS AND CONNECTOR (OUTER MIRROR CONTROL ECU - SEAT MEMORY SWITCH)

CHECK OUTER MIRROR CONTROL ECU (OPERATION)

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


DESCRIPTION

When the seat memory SET switch and a seat memory switch (seat memory switch 1, seat memory switch 2 or seat memory switch 3) are pressed simultaneously, the outer mirror control ECU commands the position control ECU and switch through CAN communication to record each position value.

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) 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 (Click here)
OK


2.CHECK SEAT MEMORY SWITCH FUNCTION

  1. Perform a memory operation properly. Check that the buzzer sounds to indicate the completion of the memory operation.

    NOTICE:
    1. The seat position will not be recorded if the seat memory SET switch and 2 or more of the seat memory switches (for example, seat memory switch 1 and seat memory switch 2) 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.
    OK:
    Seat memory switch function operates normally.


NG
Go to step 3
OK

END

3.CHECK COMBINATION METER FUNCTION

  1. When the engine switch is on (IG) and the shift lever is in P, check that the combination meter shows that the shift lever is in P.

    OK:
    Meter shows that shift lever is in P.


NG
GO TO METER / GAUGE SYSTEM (Click here)
OK


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

  1. Check the Data List for proper functioning of the seat memory switch.

    Driver Seat
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    SET Switch
    		Seat memory SET switch signal / ON or OFF
    		ON: Seat memory SET switch on
    OFF: Seat memory SET switch off
    		-
    M1 Switch
    		Seat memory switch 1 signal / ON or OFF
    		ON: Seat memory switch 1 on
    OFF: Seat memory switch 1 off
    		-
    M2 Switch
    		Seat memory switch 2 signal / ON or OFF
    		ON: Seat memory switch 2 on
    OFF: Seat memory switch 2 off
    		-
    M3 Switch
    		Seat memory switch 3 signal / ON or OFF
    		ON: Seat memory switch 3 on
    OFF: Seat memory switch 3 off
    		-
OK:
On intelligent tester screen, each item changes between ON and OFF according to above chart.


NG
Go to step 5
OK

REPLACE POSITION CONTROL ECU AND SWITCH (Click here)

5.INSPECT SEAT MEMORY SWITCH
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) Power Seat Position Is Not Memorized

  1. Remove the seat memory switch (Click here).

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

    Standard Resistance:
    Tester Connection
    		Switch Condition
    		Specified Condition
    4 (M1) - 6 (E)
    		Seat memory switch 1 pressed
    		Below 1 Ω
    3 (M2) - 6 (E)
    		Seat memory switch 2 pressed
    		Below 1 Ω
    2 (M3) - 6 (E)
    		Seat memory switch 3 pressed
    		Below 1 Ω
    5 (MRY) - 6 (E)
    		Seat memory SET switch pressed
    		Below 1 Ω


NG
REPLACE SEAT MEMORY SWITCH (Click here)
OK


6.CHECK HARNESS AND CONNECTOR (OUTER MIRROR CONTROL ECU - SEAT MEMORY SWITCH)
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) Power Seat Position Is Not Memorized

  1. Disconnect the I18*1 or I24*2 ECU connector.

  1. Disconnect the X1*1 or X2*2 switch connector.

    HINT:
    *1: for LHD
    *2: for RHD

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

    Standard Resistance:
    for LHD
    Tester Connection
    		Condition
    		Specified Condition
    I18-8 (M1) - X1-4 (M1)
    		Always
    		Below 1 Ω
    I18-7 (M2) - X1-3 (M2)
    		Always
    		Below 1 Ω
    I18-6 (M3) - X1-2 (M3)
    		Always
    		Below 1 Ω
    I18-9 (MM) - X1-5 (MRY)
    		Always
    		Below 1 Ω
    I18-10 (MSWE) - X1-6 (E)
    		Always
    		Below 1 Ω
    I18-8 (M1) - Body ground
    		Always
    		10 kΩ or higher
    I18-7 (M2) - Body ground
    		Always
    		10 kΩ or higher
    I18-6 (M3) - Body ground
    		Always
    		10 kΩ or higher
    I18-9 (MM) - Body ground
    		Always
    		10 kΩ or higher
    I18-10 (MSWE) - Body ground
    		Always
    		10 kΩ or higher
    for RHD
    Tester Connection
    		Condition
    		Specified Condition
    I24-8 (M1) - X2-4 (M1)
    		Always
    		Below 1 Ω
    I24-7 (M2) - X2-3 (M2)
    		Always
    		Below 1 Ω
    I24-6 (M3) - X2-2 (M3)
    		Always
    		Below 1 Ω
    I24-9 (MM) - X2-5 (MRY)
    		Always
    		Below 1 Ω
    I24-10 (MSWE) - X2-6 (E)
    		Always
    		Below 1 Ω
    I24-8 (M1) - Body ground
    		Always
    		10 kΩ or higher
    I24-7 (M2) - Body ground
    		Always
    		10 kΩ or higher
    I24-6 (M3) - Body ground
    		Always
    		10 kΩ or higher
    I24-9 (MM) - Body ground
    		Always
    		10 kΩ or higher
    I24-10 (MSWE) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


7.CHECK OUTER MIRROR CONTROL ECU (OPERATION)

  1. After replacing the outer mirror control ECU, check that the front power seat control functions operate normally using the front seat switches and seat memory switch.

    OK:
    Front power seat control functions operate normally.


NG
REPLACE POSITION CONTROL ECU AND SWITCH (Click here)
OK

END (REPLACE OUTER MIRROR CONTROL ECU) (Click here)