丰田普锐斯培训资料can (for prius) rev

Exit Utility
Steering Angle Sensor
Skid Control ECU
CAN Communication

Bus Check • Both ECU’s and sensors on CAN have selfdiagnosis and communication function
• High Speed Communication of large volume data • Reduce amount of wire harness • Reliable Transmission
CAN Communication

Feature • Communication Speed – High-speed communication (ISO 11898)
Control Protocol*1
Driving Control System CAN (ISO Standard)
Body Electrical Control System BEAN (TOYOTA Original) Max. 10 kbps AV signal Drive Single Wire Voltage Drive 1-11 Byte (Variable) AVC-LAN (TOYOTA Original) Max. 17.8 kbps Twist Pair Wire Differential Voltage Drive 0-32 Byte (Variable)
0V
Time
CAN Communication

Terminal Circuit • With faulty resistor
Yaw Rate Sensor Deceleration Sensor Engine ECU (ECM)
3.5 V
2.5 V
Skid Control ECU
0V
Time
CAN Communication
Communication 500 kbps* (Max. 1 Mbps) Speed Communication wire Drive Type Data Length Twist Pair Wire Differential Voltage Drive 1-8 Byte (Variable)
*1: Rule for data communications *2: bit (bit per second)
c
Powertrain Engine and ECT Laser Cruise CCS
Bus Check * : See Help
Touch!
*
DTC
Data List
View
Active Test
Utility
CAN Communication

Bus Check • Bus Check Procedure (Communication Malfunction DTC)
CAN Communication

Communication Frequency • Both nodes have two type of communication procedures (Regularly / Event)
Control
Engine ECU (ECM) Control ECT ECU Control Sensors Data Sending / Command (switch operation)
Enter DTC Data List View Active Test
Exit Utility
CAN Communication

Bus Check • Check communication with ECU’s and sensors
Engine ECU (ECM)
Yaw Rate Sensor Deceleration Sensor
1. Bus Check 2. CAN Bus Line Check
Function
Bus Check System
View
System
Bar
ห้องสมุดไป่ตู้Help
Current OK OK 1 OK OK OK
Engine and ECT Air Suspension ABS/VSC Laser Cruise Air Conditioner Immobiliser SRS Airbag Gateway Body No.2 Body No.4 Body No.5 < Back DTC Data List Details Next > View Active Test
: : : :
CAN CAN CAN CAN
Main Bus Line (High) Sub Bus Line (High) Main Bus Line (Low) Sub Bus Line (Low)
Engine ECU (ECM)
EPS ECU
DLC3
Skid Control ECU
Steering Angle Sensor
Lo
Lo
Twisted-pair Wire
AV Single Wire
CAN Communication

Feature • Communication signal
[CAN HI]
3.5 V
2.5 V
0V
Time
[Output Voltage]
[CAN LO]
2.5 V 1.5 V Time CAN HI
Communication System
— CAN —
Multiplex
CAN Communication

General • What is CAN ? – CAN is an acronym that stands for Controller Area Network. – CAN is a serial communication protocol developed by BOSCH in 1986 and standardized by (International Standards Organization) Advantage of CAN
Exit Utility
CAN Communication

Bus Check • Bus Check Procedure (Communication Bus Check)
Function
View
System
Bar
Help
System Select The following vehicle profile was found. LS430 /UCF / 03MY / 3UZ-FE
CAN Communication

Feature • Communication Frame – Same as BEAN communication, all CAN nodes (ECUs, sensors) communicate with bit signal
Address for Receiver ECU Data Type End Message Response of Receive ECU
DLC3
Function
Bus Check System
View
System
Bar
Help
Current OK OK 1 OK OK OK
Engine and ECT Air Suspension ABS/VSC Laser Cruise Air Conditioner Immobiliser SRS Airbag Gateway Body No.2 Body No.4 Body No.5 < Back DTC Data List Details Next > View Active Test
CAN Communication

Feature • Communication Wire – CAN uses twisted-pair wire
CAN [Differential Voltage Drive] BEAN [Single Wire Voltage Drive]
Hi
ECU
Hi
ECU ECU ECU

Location
Gateway ECU HV ECU Engine ECU J/C No. 2
EPS ECU J/C No. 1
Yaw Rate and Deceleration Sensor
Skid Control ECU
Steering Angle Sensor DLC3 Battery ECU
Header Data Length
Data
Priority
Error Detection Code Communication Frame
CAN Communication

Feature • Communication Type – Bus Style
Yaw Rate Sensor Deceleration Sensor
Sub Bus Line Sub Bus Line
CAN Communication

Terminal Circuit
: : : : CAN CAN CAN CAN Main Bus Line (High) Sub Bus Line (High) Main Bus Line (Low) Sub Bus Line (Low)
CAN Communication

Terminal Circuit • Normal condition
Yaw Rate Sensor Deceleration Sensor Engine ECU (ECM)
3.5 V
2.5 V
Absorb the Skid Control Signal ECU
EPS ECU Battery ECU
Yaw Rate Sensor Deceleration Sensor
Engine ECU (ECM)
Junction Connector
Terminal Circuit
Terminal Circuit
DLC3
Skid Control ECU
Steering Angle Sensor
Regular (ms)
24 – 32 32 – 64 12 – 24
Event
None
Approx. 500 – 5000
with
NOTE: BEAN: 50 – 1000 ms (250, 500, 1000)
CAN Communication

Inspection Procedure • Two methods to check bus communication 1. IT-II Tester 2. DVOM
DLC3
Skid Control ECU EPS ECU
Steering Angle Sensor
Battery ECU
Terminal Circuit (120 )
CAN Communication

Junction Connector
Junction Connector
Main Bus Line
0V
[CAN Combine]
3.5 V
2.5 V 1.5 V 0V
CAN LO
Time
CAN Communication

Communication • System Diagram – Case of PRIUS (NHW20)
SIL CAN-H CAN-L Junction Connector No. 1
: : : : :
CAN Main Bus Line (High) CAN Sub Bus Line (High) CAN Main Bus Line (Low) CAN Sub Bus Line (Low) Serial Communication Line
Junction Connector No. 2 HV ECU Gateway ECU Yaw Rate Sensor Deceleration Sensor Engine ECU (ECM)
Function
Bus Check
View
System
Bar
Help
Communication Bus Check Detect all ECUs which are connected to the communication Bus.
Touch!
Communication Malfunction DTC Diagnose DTCs which relate to the communication.