Toyota RAV4 Quiz
Air conditioning

Bus ic communication malfunction

In this manual: Air conditioning
Introduction — 37Interior — 12Exterior — 432Az-fe engine mechanical — 1552Az-fe ignition — 182Az-fe charging — 232Az-fe emission control — 82az-fe exhaust — 32Az-fe fuel — 72Az-fe lubrication — 4Brake — 17Brake control — 63U140f automatic transaxle — 59Instrument panel — 8Suspension — 18Drive shaft — 23Axle — 6Tire and wheel — 30Air conditioning — 93Lighting — 45Cruise control — 21Differential — 12Door lock — 31Engine immobiliser — 21Horn — 5Can communication — 27Mirror — 5Parking brake — 5Power steering — 27Propeller shaft — 3Seat — 29Seat belt — 27Sliding roof — 25Steering column — 6Wiper and washer — 11Supplemental restraint system — 95Other system — 5Maintenance — 14
4steps
~24min
2/5difficulty
Done 0 of 4
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

Test yourself

A quick Toyota RAV4 quiz: every answer comes with an explanation and a link to the manual page.