Toyota Sequoia (2005). Manual - part 429

DIDGG–01

–

DIAGNOSTICS

POWER SEAT CONTROL SYSTEM (w/ Driving Position 
Memory)

DI–1511

1705

DATA LIST / ACTIVE TEST

1.

DATA LIST

HINT:
Using the DATA LIST displayed on the hand–held tester, you can read the value of the switch, sensor, etc.
without parts removal. Reading the DATA LIST as the first step of troubleshooting is one way to shorten the
labor time.
(a)

Connect the hand–held tester to the DLC3.

(b)

Turn the ignition switch ON.

(c)

Read the DATA LIST according to the display on the tester.
D–SEAT:

Item

Measurement Item/

Display (Range)

Normal Condition

RECLIN SW REAR

Reclining switch signal (Rearward)/

ON or OFF

ON: Reclining switch (Rearward) is ON

OFF: Reclining switch (Rearward) is OFF

RECLIN SW FRONT

Reclining switch signal (Forward)/

ON or OFF

ON: Reclining switch (Forward) is ON

OFF: Reclining switch (Forward) is OFF

F VTCL SW DOWN

Front vertical switch signal (Downward)/

ON or OFF

ON: Front vertical switch (Downward) is ON

OFF: Front vertical switch (Downward) is OFF

F VTCL SW UP

Front vertical switch signal (Upward)/

ON or OFF

ON: Front vertical switch (Upward) is ON

OFF: Front vertical switch (Upward) is OFF

LIFTER SW DOWN

Lifter switch signal (Downward)/

ON or OFF

ON: Lifter switch (Downward) is ON

OFF: Lifter switch (Downward) is OFF

LIFTER SW UP

Lifter switch signal (Upward)/

ON or OFF

ON: Lifter switch (Upward) is ON

OFF: Lifter switch (Upward) is OFF

SLIDE SW REAR

Sliding switch signal (Rearward)/

ON or OFF

ON: Sliding switch (Rearward) is ON

OFF: Sliding switch (Rearward) is OFF

SLIDE SW FRONT

Sliding switch signal (Forward)/

ON or OFF

ON: Sliding switch (Forward)  is ON

OFF: Sliding switch (Forward) is OFF

POWER VOLTAGE

Power supply for position control ECU & switch/

MIN: 0 V, MAX: 19.89 V

Within range from 11 V to 14 V

IG SW

Ignition switch status/

ON or OFF

ON Ignition switch is ON

OFF: Ignition switch is OFF

KEY UNLOCK SW

Key unlock warning switch signal/

ON or OFF

ON: Key is in ignition key cylinder

OFF: Key is not in ignition key cylinder

D–DOOR WARN SW

Door courtesy switch signal/

ON or OFF

ON: Driver side door is open

OFF: Driver side door is closed

PNP SW

Park/neutral position switch signal/

ON or OFF

ON: Shift lever in neutral position

OFF: Shift lever in any position except neutral

M2 SW

Seat memory switch M2 signal/

ON or OFF

ON: Seat memory switch M2 is ON

OFF: Seat memory switch M2 is OFF

M1 SW

Seat memory switch M1 signal/

ON or OFF

ON: Seat memory switch M1 is ON

OFF: Seat memory switch M1 is OFF

SET SW

Seat memory set switch signal/

ON or OFF

ON: Memory set switch is ON

OFF: Memory set switch is OFF

SLIDE POS

Seat sliding position/

MIN: –4096, MAX: 4096

Within range from –4096 to 4096

RECLN POS

Seatback position/

MIN: –4096, MAX: 4096

Within range from –4096 to 4096

F VTCL POS

Seat front vertical position/

MIN: –4096 MAX: 4096

Within range from –4096 to 4096

LIFTER POS

Seat lifter position/

MIN: –4096 MAX: 4096

Within range from –4096 to 4096

MEM M1 SW

Driving position memorized with seat memory

switch M1/

MEM or NOT MEM

MEM: Memorized

NOT MEM: Not memorized

DI–1512

–

DIAGNOSTICS

POWER SEAT CONTROL SYSTEM (w/ Driving Position 
Memory)

1706

MEM M2 SW

Driving position memorized with seat memory

switch M2/

MEM or NOT MEM

MEM: Memorized

NOT MEM: Not memorized

SEAT MEM M1

Seat position memorized with seat memory

switch M1/

MEM or NOT MEM

MEM: Memorized

NOT MEM: Not memorized

SEAT MEM M2

Seat position memorized with seat memory

switch M2/

MEM or NOT MEM

MEM: Memorized

NOT MEM: Not memorized

D–MIRR MEM1

Driver side mirror position memorized with seat

memory switch M1/

MEM or NOT MEM

MEM: Memorized

NOT MEM: Not memorized

D–MIRR MEM2

Driver side mirror position memorized with seat

memory switch M2/

MEM or NOT MEM

MEM: Memorized

NOT MEM: Not memorized

P–MIRR MEM M1

Passenger side mirror position memorized with

seat memory switch M1/

MEM or NOT MEM

MEM: Memorized

NOT MEM: Not memorized

P–MIRR MEM M2

Passenger side mirror position memorized with

seat memory switch M2/

MEM or NOT MEM

MEM: Memorized

NOT MEM: Not memorized

SLIDE MEM POS 1

Seat sliding position memorized with seat

memory switch M1/

MIN: –4096, MAX: 4096

Within range from –4096 to 4096

RECLIN MEM POS 1

Seat back position memorized with seat memory

switch M1/

MIN: –4096, MAX: 4096

Within range from –4096 to 4096

F VTCL MEM POS 1

Front vertical position memorized with seat

memory switch M1/

MIN: –4096, MAX: 4096

Within range from –4096 to 4096

LIFTER MEM POS 1

Lifter position memorized with seat memory

switch M1/

MIN: –4096, MAX: 4096

Within range from –4096 to 4096

SLIDE MEM POS 2

Seat sliding position memorized with seat

memory switch M2/

MIN: –4096, MAX: 4096

Within range from –4096 to 4096

RECLIN MEM POS 2

Seatback position memorized with seat memory

switch M2/

MIN: –4096, MAX: 4096

Within range from –4096 to 4096

F VTCL MEM POS 2

Front vertical position memorized with seat

memory switch M2/

MIN: –4096, MAX: 4096

Within range from –4096 to 4096

LIFTER MEM POS 2

Lifter position memorized with seat memory

switch M2/

MIN: –4096, MAX: 4096

Within range from –4096 to 4096

D–MIRR MEM POS 1

Driver side mirror position memorized with seat

memory switch M1/

MIN: 0, MAX: 65535

Within range from 0 to 65535

P–MIRR MEM POS 1

Passenger side mirror position memorized with

seat memory switch. M1/

MIN: 0, MAX: 65535

Within range from 0 to 65535

D–MIRR MEM POS 2

Driver side mirror position memorized with seat

memory switch M2/

MIN: 0, MAX: 65535

Within range from 0 to 65535

P–MIRR MEM POS 2

Passenger side mirror position memorized with

seat memory switch M2/

MIN: 0, MAX: 65535

Within range from 0 to 65535

–

DIAGNOSTICS

POWER SEAT CONTROL SYSTEM (w/ Driving Position 
Memory)

DI–1513

1707

2.

ACTIVE TEST

HINT:
Performing the ACTIVE TEST using the hand–held tester allows you to operate the seat motors without parts
removal. Performing the ACTIVE TEST as the first step of troubleshooting is one way to shorten the labor
time.
(a)

Connect the hand–held tester to the DLC3.

(b)

Turn the ignition switch ON.

(c)

Perform the ACTIVE TEST according to the display on the tester.
D–SEAT:

Item

Test Details

Diagnostic Note

RECLINING

Test Detail:
Reclining operation FRONT/REAR/OFF
Vehicle Condition:
Vehicle is stopped

–

F VERTICAL

Test Detail:
Front vertical operation UP/DOWN/OFF
Vehicle Condition:
Vehicle is stopped

–

LIFTER

Test Detail:
Lifter operation UP/DOWN/OFF
Vehicle Condition:
Vehicle is stopped

–

SLIDE

Test Detail:
Lifter operation UP/DOWN/OFF
Vehicle Condition:
Vehicle is stopped

–

DIDE6–01

DI–1514

–

DIAGNOSTICS

POWER SEAT CONTROL SYSTEM (w/ Driving Position 
Memory)

1708

CIRCUIT INSPECTION

ECU power source circuit

CIRCUIT DESCRIPTION

The position control ECU is contained in the switch assy.
During manual operation, only one switch signal is accepted. If signals are input from 2 or more switches
simultaneously, all of them are ignored. However, when signals are input from only the front vertical switch
and lifter switch simultaneously, the signal from the lifter switch is accepted.
During automatic operation, a manual switch input overrides any other operations, i.e. automatic operations
stop and the manual input operation is accepted. For example, if a manual switch input is activated, during
a seat store/restore operation, the previous operation will cease and manual operation will be performed.
After the manual operation is performed, the previous automatic operation will not resume. Power mirror
store/restore operation is unaffected by manual switch inputs.
The position control ECU & switch assy disallows the restore operation of the power seat when the system
detects that the voltage of terminal SYSB is less than 8 V for 0.3 seconds or is more than 10 V for 30 seconds.
This circuit is a power source circuit of the position control ECU & switch assy.
HINT:
Manual adjustment of the slide reclining lumbar can be performed even when the ECU is not functional if
current is allowed to flow into terminals +B and SYSB.
Lumbar operation can always be performed.