Toyota Sequoia (2005). Manual - part 514

DID9G–01

I28586

From
Battery

From
Battery

From
Battery

From
DOME
Fuse

Back Door ECU

PWR No. 5

IG Switch

Luggage Room Light

BODY ECU

ECU–B

ECU–IG

Back Door Key Lock and Unlock Switch

Back Door Lock Assy

Back Door Unlock
Detection Switch

Back Door Courtesy
Light Switch

Back Door
Lock Motor

DOOR

ON

BRD

BECU

SIG

LGLP

ILE

BKUL

BKL

KEYE

LSWB

LSWE

BDCY

CTYE

ACT+

ACT–

WIP+

WIP–

W

P

SGND

BDDN

BDUP

DSV

DS1

DS2

DSG

BEAN

Driver Door
ECU

Rear Wiper Motor

Wiper
Motor

Reverse Position SW

String Position SW

Back Door Power Window Motor

Window
Motor

*1: Pulse Sensor

*1

*1

A/C ECU

BEAN

BEAN

BEAN

–

DIAGNOSTICS

BACK DOOR CONTROL SYSTEM

DI–1851

2045

SYSTEM DIAGRAM

DI57D–06

Customer Problem Analysis

Vehicle Brought to Workshop

Problem Symptom Confirmation

Symptom Simulation

Symptom does not
occur

Circuit Inspection

Identification of Problem

Repair or replace

Confirmation Test

End

Titles inside

are titles of pages in this

manual, with the page number indicated in
the bottom portion. See the indicated pages
for detailed explanations.

1

2

3

5

8

P. 

IN–24

P. 

DI–1853

P. 

DI–1861

 – 

DI–1885

Symptom
occurs

Step 4, 6, 8: Diagnostic steps permitting use of the hand–held tester.

7

Problem Symptoms Table

P. 

DI–1854

P. 

DI–1904

Multiplex communication system inspection *

4

*: Confirm that there is no trouble by
    DTC check.

6

DI–1852

–

DIAGNOSTICS

BACK DOOR CONTROL SYSTEM

2046

HOW TO PROCEED WITH TROUBLESHOOTING

HINT:
This ECU is connected to the multiplex communication system. Therefore, be sure to check that there is no
trouble in the multiplex communication system before performing the troubleshooting.

DI57E–04

BACK DOOR CONTROL SYSTEM Check Sheet

Inspector’s name:

Customer’s Name

VIN

Licence Plate No.

Production Date

Odometer Reading

             /               /

km
mile

Weather Conditions
When Problem
Occurred

Frequency Problem Occurs

Weather

                              /                                /

 Once only

Brought in

Malfunction
System

Outdoor Temperature

 Fine   

   

 Cloudy     

 

Rainy     

 

Snowy

 Various/Others

 Hot       

 

Warm         Cool

 Cold (Approx.     

°

F (     

°

C))

 Constant          Sometimes (    times per     day, month)

 Power Door Lock Control System

 Theft Deterrent System

 Rear Wiper and Washer System

 Back Door Power Window System

 Luggage Room Light

 Jam Protection System

 Other

–

DIAGNOSTICS

BACK DOOR CONTROL SYSTEM

DI–1853

2047

CUSTOMER PROBLEM ANALYSIS CHECK

DI57H–07

DI–1854

–

DIAGNOSTICS

BACK DOOR CONTROL SYSTEM

2048

PROBLEM SYMPTOMS TABLE

REAR WIPER AND WASHER

Symptom

Suspected Area

See page

Rear wiper does not operate.

1. Wiper switch circuit

2. Rear wiper motor circuit

3. Rear wiper limit switch circuit

4. Back door power window pulse sensor circuit

5. Body ECU

6. Back door ECU

DI–1704

DI–1880

DI–1885

DI–1877

IN–35

IN–35

Rear washer does not operate.

1. Washer switch and washer motor circuit

2. Body ECU

DI–1704

IN–35

Wiper does not operate when washer switch is ON.

1. Wiper switch and washer motor circuit

2. Body ECU

DI–1704

IN–35

OTHERS

Symptom

Suspected Area

See page

Back door power window does not operate.

1. Back door power window switch circuit

2. Back door power window pulse sensor circuit

3. Back door power window motor circuit

4. Body ECU

5. Back door ECU

DI–1718

DI–1877

DI–1874

IN–35

IN–35

Back door lock does not operate.

1. Back door key lock and unlock switch circuit

2. Back door lock motor circuit

3. Back door unlock detection switch circuit

4. Back door courtesy light switch circuit

5. Back door key lock and unlock switch circuit

6. Back door ECU

DI–1882

DI–1872

DI–1869

DI–1864

DI–1882

IN–35

Luggage room light does not come on.

1. Luggage room light circuit

2. Back door courtesy light switch circuit

3. Body door ECU

DI–1867

DI–1864

IN–35

Whole functions of the back door control system do not operate.

1. Power source circuit

2. Back door ECU

DI–1861

IN–35