Toyota Sequoia (2005). Manual — part 515
DID9H–01
I18655
BACK DOOR ECU:
B11
B10
–
DIAGNOSTICS
BACK DOOR CONTROL SYSTEM
DI–1855
2049
TERMINALS OF ECU
Symbols (Terminal No.)
Wiring Color
Terminal De-
scription
Condition
Specified Condition
BDR
↔
GND
(B11–4
↔
B11–3)
L–W
↔
W–B
Battery
Always
10 to 14 V
BECU
↔
GND
(B11–5
↔
B11–3)
W–R
↔
W–B
Battery
Always
10 to 14 V
SIG
↔
GND
(B11–6
↔
B11–3)
B–R
↔
W–B
Ignition switch
Ignition switch OFF
Below 1.0 V
SIG
↔
GND
(B11–6
↔
B11–3)
B–R
↔
W–B
Ignition switch
Ignition switch ON
10 to 14 V
LGLP
↔
GND
(B11–7
↔
B11–3)
R–L
↔
W–B
Luggage room
light
Luggage room light switch OFF or ON
Below 1.0 V
LGLP
↔
GND
(B11–7
↔
B11–3)
R–L
↔
W–B
Luggage room
light
Luggage room light switch DOOR, any door open
10 to 14 V
BDCY
↔
CTYE
(B10–7
↔
B10–20)
R
↔
W–B
Back door cour-
tesy light switch
Back door courtesy ON (Back door Open)
Below 1.0 V
BDCY
↔
CTYE
(B10–7
↔
B10–20)
R
↔
W–B
Back door cour-
tesy light switch
OFF (Back door Close)
10 to 14 V
BKUL
↔
KEYE
(B10–4
↔
B10–19)
G
↔
R–W
Back door key
lock and unlock
switch (UN-
LOCK)
Back door key lock and unlock switch UNLOCK
Below 1.0 V
BKUL
↔
KEYE
(B10–4
↔
B10–19)
G
↔
R–W
Back door key
lock and unlock
switch (UN-
LOCK)
Back door key lock and unlock switch OFF or LOCK
10 to 14 V
BKL
↔
KEYE
(B10–5
↔
B10–19)
L
↔
R–W
Back door key
lock and unlock
switch (LOCK)
Back door key lock and unlock switch LOCK
Below 1.0 V
BKL
↔
KEYE
(B10–5
↔
B10–19)
L
↔
R–W
Back door key
lock and unlock
switch (LOCK)
Back door key lock and unlock switch OFF or UNLOCK
10 to 14 V
BDUP
↔
BDDN
(B10–13
↔
B10–25)
P
↔
W
Back door pow-
er window motor
(UP)
Back door power window not operating
Below 1.0 V
DI–1856
–
DIAGNOSTICS
BACK DOOR CONTROL SYSTEM
2050
BDUP
↔
BDDN
(B10–13
↔
B10–25)
P
↔
W
Back door pow-
er window motor
(UP)
Back door power window operating upward
10 to 14 V
BDDN
↔
BDUP
(B10–25
↔
B10–13)
W
↔
P
Back door pow-
er window motor
(DOWN)
Back door power window not operating
Below 1.0 V
BDDN
↔
BDUP
(B10–25
↔
B10–13)
W
↔
P
Back door pow-
er window motor
(DOWN)
Back door power window operating downward
10 to 14 V
LSWB
↔
LSWE
(B10–6
↔
B10–22)
R–L
↔
R–Y
Back door un-
lock detection
switch
Back door unlock detection switch ON (Back door lock
unlocked)
Below 1.0 V
LSWB
↔
LSWE
(B10–6
↔
B10–22)
R–L
↔
R–Y
Back door un-
lock detection
switch
Back door unlock detection switch OFF (Back door lock
locked)
10 to 14 V
P
↔
SGND
(B10–12
↔
B10–18)
L–W
↔
L–R
Rear wiper posi-
tion switch
Rear wiper arm not in store position
10 to 14 V
P
↔
SGND
(B10–12
↔
B10–18)
L–W
↔
L–R
Rear wiper posi-
tion switch
Rear wiper arm in store position
Below 1.0 V
SGND
↔
Body ground
(B10–18
↔
Body ground)
L–R
↔
Body
ground
Ground
Always
Below 1.0 V
W
↔
SGND
(B10–3
↔
B10–18)
L–B
↔
L–R
Rear wiper re-
verse switch
Rear wiper arm not in stopping and reversing position
Below 1.0 V
W
↔
SGND
(B10–3
↔
B10–18)
L–B
↔
L–R
Rear wiper re-
verse switch
Rear wiper arm between stopping and reversing position
10 to 14 V
WIP–
↔
SGND
(B10–1
↔
B10–18)
L–O
↔
L–R
Rear wiper mo-
tor
Rear wiper motor not operating
Below 1.0 V
WIP–
↔
SGND
(B10–1
↔
B10–18)
L–O
↔
L–R
Rear wiper mo-
tor
Rear wiper motor rotates reversely
10 to 14 V
WIP+
↔
SGND
(B10–2
↔
B10–18)
L–Y
↔
L–R
Rear wiper mo-
tor
Rear wiper motor not operating
Below 1.0 V
WIP+
↔
SGND
(B10–2
↔
B10–18)
L–Y
↔
L–R
Rear wiper mo-
tor
Rear wiper motor rotates
10 to 14 V
GND
↔
Body ground
(B11–3
↔
Body ground)
W–B
↔
Body
ground
Ground
Always
Below 1.0 V
MPX1
↔
–
(B11–2
↔
– )
LG–R
↔
–
Multiplex com-
munication line
Multiplex communication circuit
–
MPX2
↔
–
(B11–1
↔
– )
B
↔
–
Multiplex com-
munication line
Multiplex communication circuit
–
ILE
↔
GND
(B11–8
↔
B11–3)
W
↔
W–B
Illumination sig-
nal
Rear room light switch OFF
Below 1.0 V
ILE
↔
GND
(B11–8
↔
B11–3)
W
↔
W–B
Illumination sig-
nal
Rear room light switch ON or DOOR
10 to 14 V
ACT–
↔
ACT+
(B10–14
↔
B10–15)
L–R
↔
L–B
Back door lock
motor
Back door lock motor not operating
Below 1.0 V
ACT–
↔
ACT+
(B10–14
↔
B10–15)
L–R
↔
L–B
Back door lock
motor
Back door lock motor rotates reversely
10 to 14 V
ACT+
↔
ACT–
(B10–15
↔
B10–14)
L–B
↔
L–R
Back door lock
motor
Back door lock motor not operating
Below 1.0 V
ACT+
↔
ACT–
(B10–15
↔
B10–14)
L–B
↔
L–R
Back door lock
motor
Back door lock motor rotates reversely
10 to 14 V
I28583
GND
–
DIAGNOSTICS
BACK DOOR CONTROL SYSTEM
DI–1857
2051
DSV
↔
DSG
(B10–11
↔
B10–23)
LG–B
↔
W–R
Back door pow-
er window pulse
sensor
Ignition switch ON
10 to 14 V
DS1
↔
GND
(B10–17
↔
B11–3)
LG–R
↔
W–B
Back door pow-
er window pulse
sensor
Back door power window operating
Pulse generation
(See waveform 1)
DS2
↔
GND
(B10–16
↔
B11–3)
P
↔
W–B
Back door pow-
er window pulse
sensor
Back door power window operating
Pulse generation
(See waveform 1)
DSG
↔
Body ground
(B10–23
↔
Body ground)
W–R
↔
Body
ground
Back door pow-
er window pulse
sensor ground
Always
Below 1 V
Waveform 1
Item
Condition
Tool setting
5 V/DIV, 10 ms/DIV
Vehicle condition
Back door power window operating
DID9I–01
DI–1858
–
DIAGNOSTICS
BACK DOOR CONTROL SYSTEM
2052
DATA LIST / ACTIVE TEST
1.
DATA LIST
HINT:
According to the DATA LIST displayed by the hand–held tester, you can read the value of the switch, sensor,
actuator and so on without parts removal. Reading the DATA LIST as the first step of troubleshooting is one
of the methods to shorten labor time.
(a)
Connect the hand–held tester to the DLC3.
(b)
Turn the ignition switch ON.
(c)
According to the display on the tester, read the DATA LIST.
BACK–DOOR:
Item
Measurement Item/
Display (Range)
Normal Condition
Diagnostic Note
COURTSY SW
Back door courtesy
light SW signal/ON or
OFF
ON: Back door is open
OFF: Back door is closed
–
LOCK POS SW
Lock position SW sig-
nal/ON or OFF
ON: Door lock is in unlock position
OFF: Door lock is in lock position
–
WIPER TURN SW
Rear wiper reversing
position switch/ON or
OFF
ON: Rear wiper reverse position
OFF: Rear wiper non–reverse position
–
WIPER RTRCT SW
Rear wiper position
switch/ON or OFF
ON: Rear wiper arm in store position
OFF: Rear wiper arm not in store position
–
KEY SW (UNLOCK)
Unlock SW linked with
the key/ON or OFF
ON: Back door lock is in unlock position
OFF: Back door lock is in lock position
–
KEY SW (LOCK)
Unlock SW linked with
the key/ON or OFF
ON: Back door lock is in lock position
OFF: Back door lock is in unlock position
–
UP/DOOR KEY
Back door key lock
and unlock switch
linked window open
and close/AVAIL or
NOT AVL
AVAIL: Key–linked open and close SET
NOT AVL: Key–linked open and close UNSET
*1
DOWN/DOOR KEY
Back door key lock
and unlock switch
linked window open
and close/AVAIL or
NOT AVL
AVAIL: Key–linked open and close SET
NOT AVL: Key–linked open and close UNSET
*1
P/W POSITION
Back door power win-
dow position/CLOSE
or OPEN
CLOSE: Back door power window is fully closed
OPEN: Back door power window is opened
–
GLASS POS–1/4
Back door power win-
dow glass position
(Fully closed – 1/4
open): OK or CAU-
TION
OK: Power window is going UP by manual operation
CAUTION: CAUTION may be displayed even when no resis-
tance is applied in each position. In this case there is a for-
eign object stuck in that position.
–
GLASS POS–2/4
Back door power win-
dow glass position
(Fully closed – 2/4
open): OK or CAU-
TION
OK: Power window is going UP by manual operation
CAUTION: CAUTION may be displayed even when no resis-
tance is applied in each position. In this case there is a for-
eign object stuck in that position.
–
GLASS POS–3/4
Back door power win-
dow glass position
(Fully closed – 3/4
open): OK or CAU-
TION
OK: Power window is going UP by manual operation
CAUTION: CAUTION may be displayed even when no resis-
tance is applied in each position. In this case there is a for-
eign object stuck in that position.
–
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