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.

–