Front Power Seat Control System (W/ Memory) Front Power Seat Does Not Operate With Front Power Seat Switch


DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

READ VALUE USING INTELLIGENT TESTER (FRONT POWER SEAT SWITCH)

CHECK HARNESS AND CONNECTOR (FRONT POWER SEAT SWITCH - BATTERY AND BODY GROUND)

FRONT POWER SEAT CONTROL SYSTEM (w/ Memory) - Front Power Seat does not Operate with Front Power Seat Switch


DESCRIPTION

When a signal is input into the front power seat switch (seat ECU), the ECU manages the signals received from the front power seat switch and operates each motor. When 2 or more signals are input, the motors only operate when the signals are from the slide switch and reclining switch.

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) Front Power Seat Does Not Operate With Front Power Seat Switch


INSPECTION PROCEDURE

HINT:
Inspect the fuses for circuits related to this system before performing the following inspection procedure.
1.READ VALUE USING INTELLIGENT TESTER (FRONT POWER SEAT SWITCH)

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

    Driver Seat
    Tester Display
    		Measurement Item/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.


NG
Go to step 2
OK

USE SIMULATION METHOD TO CHECK (LandCruiser RM000003YMJ00XX.html)

2.CHECK HARNESS AND CONNECTOR (FRONT POWER SEAT SWITCH - BATTERY AND BODY GROUND)


    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) Front Power Seat Does Not Operate With Front Power Seat Switch

  1. for LHD:
    Disconnect the b4 and b5 switch connectors.

  1. for RHD:
    Disconnect the a4 and a5 switch connectors.

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

    Standard Voltage:
    for LHD
    Tester Connection
    		Condition
    		Specified Condition
    b4-7 (+B) - Body ground
    		Always
    		11 to 14 V
    b5-12 (SYSB) - Body ground
    		Always
    		11 to 14 V
    for RHD
    Tester Connection
    		Condition
    		Specified Condition
    a4-7 (+B) - Body ground
    		Always
    		11 to 14 V
    a5-12 (SYSB) - Body ground
    		Always
    		11 to 14 V

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

    Standard Resistance:
    for LHD
    Tester Connection
    		Condition
    		Specified Condition
    b4-2 (GND) - Body ground
    		Always
    		Below 1 Ω
    for RHD
    Tester Connection
    		Condition
    		Specified Condition
    a4-2 (GND) - Body ground
    		Always
    		Below 1 Ω
Text in Illustration
*A
for LHD
*B
for RHD
*a
Front view of wire harness connector
(to Front Power Seat Switch)


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE FRONT POWER SEAT SWITCH (LandCruiser RM000004673017X.html)