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.
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