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:

Rear wheel alignment
adjustment Inspect tire Inspect the tire (see page tw-1). Measure vehicle height Measure the vehicle height (see page sp-3). Inspect toe-in Standard toe-in If the toe-in is not within the specified range, inspect the suspension parts and replace them if necessar ...

Sruepsptrleaminetnstal restraint system center airbag sensor assembly
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Air inlet damper control servo motor circuit
Description The damper servo (air inlet control) sends pulse signals to indicate the damper position to the air conditioning amplifier. The air conditioning amplifier activates the motor (normal or reverse) based on these signals to move the air inlet control damper to the appropriate pos ...

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