COMPONENT PARTS
Component Parts Location
SYSTEM
CAN COMMUNICATION SYSTEM
CAN COMMUNICATION SYSTEM : System Description
SYSTEM DIAGRAM
DESCRIPTION
CAN Communication Signal Generation
NOTE: A signal with no current passage is called “Recessive” and one with current passage is called “Dominant”.
The Construction of CAN Communication Signal (Message)
No. |
Message name |
Description |
1 | Start of frame (1 bit) | Start of message. |
2 | Arbitration of field (11 bit) | Priorities of message-sending are shown when there is a possibility that multiple messages are sent at the same time. |
3 | Control field (6 bit) | Signal quantity in data field is shown. |
4 | Data field (0-64 bit) | Actual signal is shown. |
5 | CRC field (16 bit) |
|
6 | ACK field (2 bit) | The completion of normal reception is sent to the transmitting unit. |
7 | End of frame (7 bit) | End of message. |
CAN Communication Line
The CAN communication line is a twisted pair wire consisting of strands of CAN-H 1 and CAN-L 2 and has noise immunity.
NOTE: The CAN communication system has the characteristics of noise-resistant because this system produces digital signals by using the potential difference between the CAN-H line and the CAN-L line and has the twisted pair wire structure.
Since the CAN-H line and the CAN-L line are always adjacent to each other, the same degree of noise occurs, respectively, when a noise 1 occurs. Although the noise changes the voltage, the potential difference 2 between the CAN-H line and the CAN-L line is insensitive to noise. Therefore, noise-resistant signals can be obtained.
CAN Signal Communications
Each control unit of the CAN communication system transmits signals through the CAN communication control circuit included in the control unit and receives only necessary signals from each control unit to perform various kinds of control.
NOTE: The above signal names and signal communications are provided for reference purposes. For CAN communications signals of this vehicle, refer to LAN-32, "CAN COMMUNICATION SYSTEM : CAN Communication Signal Chart".
CAN COMMUNICATION SYSTEM : CAN Communication Control Circuit
CAN communication control circuit is incorporated into the control unit and transmits/receives CAN communication signals.
Component |
System description |
CAN controller | It controls CAN communication signal transmission and reception, error detection, etc. |
Transceiver IC | It converts digital signal into CAN communication signal, and CAN communication signal into digital signal. |
Noise filter | It eliminates noise of CAN communication signal. |
Termination circuit* (Resistance of approx. 120 Ω) | Generates a potential difference between CAN-H and CAN-L. |
*: These are the only control units wired with both ends of CAN communication system.
CAN COMMUNICATION SYSTEM : CAN System Specification Chart
Determine CAN system type from the following specification chart.
NOTE: Refer to LAN-17, "Trouble Diagnosis Procedure" for how to use CAN system specification chart.
×: Applicable
*1: With auto A/C
*2: Without auto A/C
VEHICLE EQUIPMENT IDENTIFICATION INFORMATION
NOTE: Check CAN system type from the vehicle shape and equipment.
CAN COMMUNICATION SYSTEM : CAN Communication Signal Chart
Refer to LAN-16, "How to Use CAN Communication Signal Chart" for how to use CAN communication signal chart.
NOTE: Refer to LAN-22, "Abbreviation List" for the abbreviations of the connecting units.
NOTE: CAN data of the air bag diagnosis sensor unit is not used by usual service work, thus it is omitted.
B0029 side curtain air bag module RH
DTC Logic
DTC DETECTION LOGIC
CONSULT name
DTC
DTC detecting condition
Repair order
CURTAIN AIRBAG MODULE RH CIRCUIT
[OPEN]
B0029
RH side curtain air bag module circuit
is open.
Refer to SRC-57, "Diagnosis Procedure".
CURTA ...
Automatic operation
Cooling and/or dehumidified heating
(AUTO)
This mode may be used all year round as the
system automatically works to keep a constant
temperature. Air flow distribution and fan speed
are also controlled automatically.
Press the AUTO button on. The indicator on
the button will illumin ...
Removal and installation
FRONT WHEEL HUB
Exploded View
Disc brake rotor
Nut retainer
Cotter pin
Wheel stud
Steering knuckle
Splash guard
Wheel hub and bearing
Wheel hub lock nut
Removal and Installation
REMOVAL
Remove front wheel and tire using power tool. Refe ...