Last Modified: 04-05-2023 6.11:8.1.0 Doc ID: RM1000000018DKH
Model Year Start: 2018 Model: Sienna Prod Date Range: [11/2017 -           ]
Title: NETWORKING: CAN COMMUNICATION SYSTEM: SYSTEM DIAGRAM; 2018 - 2020 MY Sienna [11/2017 -        ]

SYSTEM DIAGRAM

1. OVERALL CAN BUS DIAGRAM

(a) The CAN communication system is composed of 5 buses.

CAN Main Bus Line

Terminating Resistor

CAN Branch Line

*

Gateway Function Equipped ECU

Bus Monitoring Direction

-

-

Bus

Code

ECU/Sensor Name

CAN DTC Storage

Note

-

CGW

Central Gateway ECU (Network Gateway ECU)

-

-

V Bus

DLC3

DLC3

-

-

Bus 2

ENG

ECM

Available

-

MET

Combination Meter Assembly

Available

-

EPS

Steering Column Assembly (Power Steering ECU)

Available

-

A/C

Air Conditioning Amplifier Assembly

Available

-

SMT

Certification ECU (Smart Key ECU Assembly)

Available
  • The certification ECU (smart key ECU assembly) is also connected to the LIN communication system.
  • w/ Smart Key System

MB

Main Body ECU (Multiplex Network Body ECU)

Available
  • The main body ECU (multiplex network body ECU) acts as a gateway between the bus 2 and sub bus 1.
  • The main body ECU (multiplex network body ECU) is also connected to the LIN communication system.

BRK

Brake Actuator Assembly (Skid Control ECU)

Available

-

SRS

Airbag Sensor Assembly

-

-

STR

Steering Angle Sensor (Spiral Cable with Sensor Sub-assembly)

-

-

PMN

Power Management Control ECU

Available

w/ Smart Key System

AWD

4WD ECU Assembly

Available

for AWD

J/C NO. 5

No. 5 Junction Connector

-

-

J/C NO. 6

No. 6 Junction Connector

-

-

Bus 3

AV

Radio and Display Receiver Assembly

Available

-

DCM

DCM (Telematics Transceiver)

Available

w/ Telematics Transceiver

J/C NO. 4

No. 4 Junction Connector

-

-

Bus 5

DS

Driving Support ECU Assembly

Available

w/ Toyota Safety Sense P

CS

Clearance Warning ECU Assembly

Available

w/ Intuitive Parking Assist System

PAC

Parking Assist ECU

Available

w/ Panoramic View Monitor System

F-CAM

Forward Recognition Camera

Available

w/ Toyota Safety Sense P

BSM

Blind Spot Monitor Sensor RH

Available

w/ Blind Spot Monitor System

F-MR

Millimeter Wave Radar Sensor Assembly

-

w/ Toyota Safety Sense P

R-CA

Rear Television Camera Assembly

Available

w/ Panoramic View Monitor System

ST2

No. 2 CAN Junction Terminal

-

-

CAN J/C NO. 2

No. 2 CAN Junction Connector

-

-

CAN J/C NO. 3

No. 3 CAN Junction Connector

-

-

Sub Bus 1

MB

Main Body ECU (Multiplex Network Body ECU)

Available
  • The main body ECU (multiplex network body ECU) acts as a gateway between the bus 2 and sub bus 1.
  • The main body ECU (multiplex network body ECU) is also connected to the LIN communication system.

F-DRR

Outer Mirror Control ECU Assembly LH

Available

w/ Seat Position Memory System

F-DRL

Outer Mirror Control ECU Assembly RH

Available

w/ Seat Position Memory System

PSD-R

Slide Door Motor Unit LH

-

w/ Power Slide Door

PSD-L

Slide Door Motor Unit RH

-

w/ Power Slide Door

DST

Front Power Seat Switch LH

-

w/ Seat Position Memory System

BKD

Power Back Door Unit (Back Door ECU)

-

w/ Power Back Door

ST1

No. 1 Junction Terminal

-

-

CAN J/C NO. 1

No. 1 CAN Junction Connector

-

-