Toyota Sequoia (2005). Manual - part 509

–

DIAGNOSTICS

PASSENGER DOOR CONTROL SYSTEM

DI–1831

2025

3

Check wire harness and connector between door unlock detection switch and
passenger door ECU (See page 

IN–35

).

NG

Repair or replace wire harness or connector.

OK

Proceed to next circuit inspection shown in
problem symptoms table
(See page 

DI–1818

).

I28438

D21
Door Key Lock and
Unlock SW Front RH

LSWE

PKUL

PKL

13

2

3

W–B

LG–R

LG–B

4

1

2

Front Passenger 
Door ECU

F18 F18

*1: w/ Driving Position Memory
*2: w/o Driving Position Memory

(*1) (*2)

F18 F18

F18 F18

9

10

22

(*1) (*2)

(*1) (*2)

DI–1832

–

DIAGNOSTICS

PASSENGER DOOR CONTROL SYSTEM

2026

Door key lock and unlock switch circuit

CIRCUIT DESCRIPTION

The door key lock and unlock switch is built in the door lock motor. When the key is turned to the lock side,
terminal 2 of the switch is grounded and when the key is turned to the unlock side, terminal 1 of the switch
is grounded.
The door key lock and unlock switch can be checked using the DTC check (refer to 

DI–1904

).

WIRING DIAGRAM

DI1Q9–09

–

DIAGNOSTICS

PASSENGER DOOR CONTROL SYSTEM

DI–1833

2027

INSPECTION PROCEDURE

1

Check the door key lock and unlock switch (See page 

BE–79

).

NG

Replace the door key lock and unlock switch.

OK

2

Check wire harness and connector between door key lock and unlock switch
and passenger door ECU (See page 

IN–35

).

NG

Repair or replace wire harness or connector.

OK

Proceed to next circuit inspection shown in
problem symptoms table
(See page 

DI–1818

).

I28439

D11
Door Courtesy
Light Front RH

CTYB

PCYL

6

5

R

R–W

1

2

Front Passenger Door
ECU

*1: w/ Driving Position Memory
*2: w/o Driving Position Memory

(*1) (*2)

5

5

6

F18 F18

F18 F18
(*1) (*2)

DI–1834

–

DIAGNOSTICS

PASSENGER DOOR CONTROL SYSTEM

2028

Door courtesy light circuit

CIRCUIT DESCRIPTION

The door courtesy light comes on when the door is opened and goes off when the door is closed.

WIRING DIAGRAM

DI1QA–09