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
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