Toyota RAV4 manuals

Toyota RAV4 Service Manual: Bus ic communication malfunction

Toyota RAV4. Bus ic communication malfunction


Description

The air conditioning harness connects the air conditioning amplifier and the servos. The air conditioning amplifier supplies power and sends operation instructions to each servo through the air conditioning harness. Each servo sends damper position information to the air conditioning amplifier.

Toyota RAV4. Bus ic communication malfunction


Wiring diagram

Toyota RAV4. Bus ic communication malfunction


Inspection procedure

  1. Check air conditioning amplifier

Toyota RAV4. Check air conditioning amplifier


  1. Remove the air conditioning amplifier with its connectors still connected.
  2. Measure the resistance of the wire harness side connector.

Standard resistance




  1. Check air conditioning amplifier

Toyota RAV4. Check air conditioning amplifier


  1. Remove the air conditioning amplifier with its connectors still connected.
  2. Measure the voltage of the wire harness side connector.

Standard voltage




Replace air conditioning harness assembly

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Multiplex communication circuit
Description The air conditioning amplifier communicates data with the ecm and combination meter through the can communication system. Wiring diagram Inspection procedure Check dt ...

Other materials:

Cold start
Description The electronic throttle control system (etcs) controls the engine idling speed. The etcs operates the throttle actuator to open and close the throttle valve, and adjusts the intake air amount to achieve the target idling speed. In addition, the ecm retards the ignition timi ...

Diagnostic trouble code chart
Hint: If any dtcs are displayed during the dtc check, inspect the circuit listed for these dtcs. For details of each dtc, refer to the page indicated in the dtc chart. Hint: : Warning light comes on X: warning light turns off (normal reset) ...

Precaution
Notice: Take extra care to replace each part properly. Improper installation or repair could affect the performance of the brake system and cause a driving hazard. It is very important to keep the brake system parts and the work area clean when repairing the brake system. If the vehicl ...

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