Toyota RAV4 (XA40) 2013-2018 Service Manual: 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.
Wiring diagram
Inspection procedure
- Check air conditioning amplifier
- Remove the air conditioning amplifier with its connectors still connected.
- Measure the resistance of the wire harness side connector.
Standard resistance
- Check air conditioning amplifier
- Remove the air conditioning amplifier with its connectors still connected.
- Measure the voltage of the wire harness side connector.
Standard voltage
Replace air conditioning harness assembly
Compressor solenoid circuit (2006/01- )
Description
In this circuit, the compressor receives a refrigerant compression demand
signal from the air conditioning
amplifier. Based on this signal, the compressor changes the degree of
r ...
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:
If you think
something is wrong
If you notice any of the following symptoms, your vehicle probably
needs adjustment or repair. Contact your toyota dealer as
soon as possible.
Visible symptoms
Fluid leaks under the vehicle
(water dripping from the air conditioning after use is normal.)
Flat-looking tires or uneven tire w ...
Catalyst system efficiency below threshold (bank 1)
Monitor description
The ecm uses sensors mounted in front of and behind the three-way catalytic
converter (twc) to
monitor its efficiency.
The first sensor, the air-fuel ratio (a/f) sensor, sends pre-catalyst
information to the ecm. The second
sensor, the heated oxygen (ho2) sensor, se ...
Disassembly
Caution:
Wear protective gloves. Sharp areas on the seatback
frame, seat cushion frame and reclining adjuster may
injure your hands.
Remove rear seat headrest assembly
Remove rear seat center headrest
assembly
Remove center armrest hinge cover rh
Return the seatback to the upr ...
