Toyota RAV4 manuals

Toyota RAV4 Service Manual: System description

  1. Brief description

  1. 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.
  2. By pairing the canh and canl bus lines, the can performs communication based on differential voltages.
  3. Many ecus (sensors) installed on the vehicle operate by sharing information and communicating with each other
  4. The can has 2 resistors of 120 ù which are necessary to communicate with the main wire.
  1. Definition of terms

  1. Main wire
  1. 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.
  1. Branch wire
  1. The branch wire is a wire harness which diverges from the main wire to an ecu or sensor.
  1. Terminus circuit
  1. 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.
  1. Can j/c

The can j/c is a junction designed for can communication, which contains a terminus circuit.

  1. Ecu or sensor which communicate via can communication system

  1. Abs and traction actuator (skid control ecu)
  2. Power steering ecu
  3. Steering angle sensor
  4. Yaw rate sensor
  5. Ecm
  6. Center airbag sensor
  7. Air conditioning amplifier
  8. Combination meter ecu
  9. Main body ecu
  10. 4Wd control ecu*

Hint:

*: For 4wd

  1. Diagnostic codes for can communication system

  1. Dtcs for the can communication system are as follows: u0073, u0100, u0105, u0121, u0122, u0123, u0124, u0126, u0129, c1280, c1296, c1297, and b1499.
  1. Notes regarding troubleshooting

  1. 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.

  1. Dtcs regarding the can communication system can be checked using the intelligent tester.
  2. 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.
Parts location
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 ...

How to proceed with troubleshooting
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:

Problem symptoms table
Hint: Use the table below to help determine the cause of the problem symptom. The potential causes of the symptoms are listed in order of probability in the "suspected area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Re ...

Mil circuit
Description The mil (malfunction indicator lamp) is used to indicate vehicle malfunction detections by the ecm. When the ignition switch is turned on, power is supplied to the mil circuit, and the ecm provides the circuit ground which illuminates the mil. The mil operation can be checked ...

Outer rear view mirror
Components Removal Hint: Use the same procedures for the lh side and rh side. The procedures listed below are for the lh side. Remove front door lower frame bracket garnish lh (see page ed-19) Remove front armrest upper base panel lh (see page ed-19) Remove front door t ...

В© 2011-2019 Copyright www.trav4.net