Toyota RAV4 manuals

Toyota RAV4 Service Manual: Control module communication bus off

Toyota RAV4. Control module communication bus off


Description

Toyota RAV4. Control module communication bus off


Toyota RAV4. Control module communication bus off


Inspection procedure

The skid control ecu inputs the signals from the ecm, steering angle sensor, and yaw rate and acceleration sensor via can communication system.

  1. Check harness and connector (momentary interruption)

  1. Using the data list of the intelligent tester, check for any momentary interruption in the wire harness and connector corresponding to a dtc (see page bc-23).

Toyota RAV4. Check harness and connector (momentary interruption)


Result


Hint:

Perform the above inspection before removing the sensor and connector.



  1. Check if each sensor and ecm connector is securely connected

  1. Check if each sensor or ecm connector is securely connected.

Ok: the connector should be securely connected.



  1. Reconfirm dtc

  1. Record the output dtcs (for abs, vsc and can communication) (see page bc-47).

Hint:

If the can communication system dtc and the relevant sensor dtcs are output simultaneously, troubleshoot the relevant sensor dtcs (for abs and vsc) after the can communication system returns to normal.

Result




Inspect can communication system

  1. Repair or replace harness and connector

  1. Repair or replace the harness or connector.
  2. Check for any momentary interruption between the skid control ecu and each sensor or ecm (see page bc-23).
  3. Check that there is no momentary interruption.


  1. Reconfirm dtc

  1. Clear the dtc (see page bc-47).
  2. Turn the ignition switch on.
  3. Drive the vehicle and turn the steering wheel to the right and left at a speed of 15 km/h (9 mph) or more.
  4. Check that no can communication system dtc is output (see page bc-47).
  5. If abs and/or vsc dtcs are output, record them.

Result


Hint:

The can communication system must be normal when repairing the sensor dtcs (for abs and vsc).



Inspect can communication system

Downhill assist control operation switch (test mode dtc)
Description The downhill assist control switch is connected to the skid control ecu in the abs and traction actuator. Dtc c1379/74 can be detected when the downhill assist control switch se ...

Abs warning light remains on
Description If any of the following conditions are detected, the abs warning light remains on: The ecu connectors are disconnected from the skid control ecu. There is a malfunction in the ski ...

Other materials:

Compressor circuit
Description When the a/c switch is turned on, the magnetic clutch on signal is sent from the air conditioning amplifier. Then the mg clt relay turns on to operate the magnetic clutch. Wiring diagram Inspection procedure Inspection procedure Perform active test by intelligent tester (a ...

Fail-safe chart
Fail-safe function When communication fails in any of the main wires (communication lines) due to a short circuit or other causes, the fail-safe function, which is specified for each system, operates to prevent the system from malfunctioning. The table below shows the effects on e ...

Camshaft position correlation (bank 1 sensor a)
Dtc P0016 P0016 crankshaft position - camshaft position correlation (bank 1 sensor a) Description In the vvt (variable valve timing) system, the appropriate intake valve open and close timing is controlled by the ecm. The ecm performs intake valve control by performing the following: 1) cont ...

В© 2011-2023 Copyright www.trav4.net