Toyota Sequoia (2005). Manual - part 452

I28425

Brake Master Cylinder

 Brake Fluid Level Warning Switch

Engine Room R/B

 ECU–B Fuse

Light Control Rheostat

Combination Meter Assembly

Instrument Panel J/B

 IGN 2 Fuse

 GAUGE Fuse

Parking Brake Switch

Ignition Switch

Passenger Seat 
Belt Warning

Skid Control ECU

–

DIAGNOSTICS

COMBINATION METER SYSTEM

DI–1603

1797

I28825

Engine Coolant Temperature Sender Gauge

Oil Pressure Sender

DI–1604

–

DIAGNOSTICS

COMBINATION METER SYSTEM

1798

DID8P–01

I28566

Seat Position 
Control ECU

A/C ECU (Integration 
Control Panel)

BEAN

Body ECU

Back Door ECU

ECM

Light Control 
Rheostat

Vehicle Speed 
Sensor

Oil Pressure 
Sender Gauge

Fuel Sender Gauge

Seat Inner 
Belt Switch

Park/neutral 
Position Switch

Turn Signal 
Flasher Relay

Washer Level Sensor

Key Unlock 
Warning Switch

Door Courtesy 
Lamp Switch

Parking Brake Switch

Transponder 
Key ECU

4WD Control ECU

Airbag Sensor 
Center ECU

Combination 
Meter

Skid Control ECU

Suspension 
Control ECU

Translate ECU

Overhead Module 
(Garage Door 
Opener)

BEAN

BEAN

BEAN

BEAN

BEAN

BEAN

–

DIAGNOSTICS

COMBINATION METER SYSTEM

DI–1605

1799

SYSTEM DIAGRAM

DI–1606

–

DIAGNOSTICS

COMBINATION METER SYSTEM

1800

Input and output signals of each ECU

Transmitting ECU 

(transmitter)

Receiving ECU

Signals

Communication 

method

A/C ECU

Combination meter

Driver door control ECU

Passenger door control ECU

Temperature data

BEAN

A/C ECU

Combination meter

Engine coolant temperature data

BEAN

Combination meter

A/C ECU

Body ECU

Driver door control ECU

Passenger door control ECU

Back door ECU

Vehicle speed signal

BEAN

Combination meter

Body ECU

Seat control ECU

Shift position signal

BEAN

Combination meter

A/C ECU

Body ECU

Driver door control ECU

Passenger door control ECU

Back door ECU

Meter activation signal

BEAN

Combination meter

A/C ECU

Display unit demand signal

BEAN

Combination meter

Body ECU

Engine system signal

BEAN

Body ECU

A/C ECU

Combination meter

Driver door control ECU

Passenger door control ECU

Seat control ECU

Sliding roof control ECU

Back door ECU

Diagnosis tool demand signal

BEAN

Body ECU

A/C ECU

Combination meter

Body control system signal

 

(HEAD

signal, TAIL signal)

BEAN

Body ECU

Combination meter

Driver door control ECU

Passenger door control ECU

Seat control ECU

Sliding roof control ECU

Back door ECU

Body control system signal

 

(IG

signal, ACC signal, All door cour-

tesy lamp signal, Door lock signal,

Door unlock signal)

BEAN

Body ECU

Combination meter

Driver door control ECU

Passenger door control ECU

Seat control ECU

Sliding roof control ECU

Back door ECU

Body ECU activation signal

BEAN

Body ECU

Combination meter

Driver door control ECU

Seat control ECU

Body control system signal (KSW

signal)

BEAN

Body ECU

Combination meter

Driver door control ECU

Passenger door control ECU

Seat control ECU

Door condition signal

 

(Driver side

door courtesy lamp signal, Pas-

senger side door courtesy signal)

BEAN