Toyota RAV4 (XA40) 2013-2018 Service Manual: 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 dtc
- Clear the dtc (see page ac-127).
- Read the dtc (see page ac-127).
Result 
Go to can communication system
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
ref ...
Blower motor circuit
Description
When the heater control (blower switch) is set to position 1 or higher, the
contact of the htr relay is
closed, current flows to the blower motor, and the blower motor operates. The
...
Other materials:
Fog light relay
On-vehicle inspection
Inspect front fog light relay
Remove the front fog relay from the no. 6 Relay
block.
Measure the resistance of the relay.
Standard resistance
If the result is not as specified, replace the relay. ...
Brake pedal load sensing switch
Description
The brake pedal load sensing switch is turned on when the brake pedal is
depressed with force exceeding
a predetermined level.
The skid control ecu detects if the brake pedal is depressed or not via this
circuit.
Wiring diagram
Inspection procedure
Notice:
When repla ...
Inspection
Inspect water pump assembly
Visually check the drain hole for coolant leakage.
If leakage is found, replace the water pump
assembly.
Turn the pulley, and then check that the water pump
bearing moves smoothly without making a "click"
noise.
If it does not move s ...
