Toyota RAV4 (XA40) 2013-2018 Service Manual: System description
- Brief description
- The can (controller area network) is a serial data
communication system for real time application. It is
a vehicle multiplex communication system which
has a high communication speed (500 kbps) and
the ability to detect malfunctions.
- By pairing the canh and canl bus lines, the can
performs communication based on differential
voltages.
- Many ecus (sensors) installed on the vehicle
operate by sharing information and communicating
with each other
- The can has 2 resistors of 120 ù which are
necessary to communicate with the main wire.
- Definition of terms
- Main wire
- The main wire is a wire harness between the 2
terminus circuits on the bus (communication
line). This is the main bus in the can
communication system.
- Branch wire
- The branch wire is a wire harness which
diverges from the main wire to an ecu or
sensor.
- Terminus circuit
- The terminus circuit is a circuit which converts
the communication current of the can
communication into the bus voltage. It consists
of a resistor and condenser. 2 Terminus circuits
are necessary on a bus.
- Can j/c
The can j/c is a junction designed for can
communication, which contains a terminus
circuit.
- Ecu or sensor which communicate via can communication system
- Abs and traction actuator (skid control ecu)
- Power steering ecu
- Steering angle sensor
- Yaw rate sensor
- Ecm
- Center airbag sensor
- Air conditioning amplifier
- Combination meter ecu
- Main body ecu
- 4Wd control ecu*
Hint:
*: For 4wd
- Diagnostic codes for can communication
system
- Dtcs for the can communication system are as
follows: u0073, u0100, u0105, u0121, u0122,
u0123, u0124, u0126, u0129, c1280, c1296,
c1297, and b1499.
- Notes regarding troubleshooting
- Trouble in the can bus (communication line) can be
checked through the dlc3 (except when there is a
wire break other than in the branch wire of the
dlc3).
Notice:
Do not connect the tester directly to the dlc3
connector. Be sure to use a service wire.
- Dtcs regarding the can communication system
can be checked using the intelligent tester.
- The can communication system cannot detect
trouble in the branch line of the dlc3 even though
the dlc3 is also connected to the can
communication system.
System diagram
Hint:
The abs and traction actuator (skid control ecu)
detects and stores steering sensor and yaw rate
sensor dtcs and performs dtc communication by
receiving ...
Notice:
Dtcs for the can communication system are as
follows: u0073, u0100, u0105, u0121, u0122, u0123,
u0124, u0126, u0129, c1280, c1296, c1297, and
b1499.
Refer to the troubleshooting pr ...
Other materials:
Registering a bluetooth®
phone for the first time
To use the hands-free system, it is necessary to register a
bluetooth® phone with the system.
Once the phone has been registered, it is possible to use the
hands-free system.
For details about registering a bluetooth® device
Turn the bluetooth® connection setting of your cellular phon ...
Rear differential carrier assembly
Components
...
Terminals of ecu
Check occupant classification ecu
Measure the voltage of the connector.
...