2013-2017 Toyota Avalon 3.5 Liter Engine

2012-2017 Toyota Camry all Engine

2011-2013 Toyota Corolla 1.8 Liter engine

2011-2013 Toyota Highlander 3.5 Liter Non-Hybrid Engine

2011-2013 Toyota Corolla 1.8 Liter engine

2011-2016 Toyota Sienna 3.5 Liter Engine

2013-2018 Lexus ES350 3.5 Liter Engine

2013-2015 Lexus GS350 3.5 Liter Engine

2010-2015 Lexus RX350 3.5 Liter Engine

2011-2016 Scion TC

Diagnose and fix Toyota, Lexus, Scion  no AC

Late model Toyota Lexus Scion vehicles use a refrigerant flow sensor in addition to the normal low and high pressure switches. The flow sensor is located in the AC compressor. The ECM uses information from the flow sensor to vary engine idle speed to prevent stalling. If the sensor is bad, the AC amplifier won’t send the proper digital signal to the ECM and the ECM won’t engage the AC compressor clutch. You wind up with a Toyota no AC condition.
Toyota Lexus Scion no AC symptoms

The AC in your car blows warm. You check the AC compressor and discover the compressor won’t engage when you turn on the AC. Start diagnosis with scan tool. You’ll need a high end scan tool to see a body “B” code. A bad flow sensor will usually show as B1479 open or short in AC flow sensor circuit trouble code.
How the AC flow sensor works

The Toyota AC flow sensor in the compressor receives a 5-volt reference voltage from the AC amplifier located to the right of the accelerator pedal. It varies the output voltage back to the AC amplifier based on refrigerant flow.

Use your scan tool to see if the ECM is receiving an AC ON request from the AC amplifier. If you don’t see that request, perform these tests.
Test the AC flow sensor
1. Check for 5-volt reference signal on the white wire
2. Check for flow sensor voltage on the red wire.
With the AC OFF and blower switch OFF the voltage on the red wire should be 3.8 to 4.2-volts.
With the AC ON and Blower on HIGH, the voltage on the red wire should be 0.7 to 3.8-volts.
If voltage is less than 0.7 or higher than 4.2, sensor is bad
If no signal on red wire but you see 5-volt reference on white wire, sensor is bad

This brand new FLOW SENSOR will only fit into your original Denso Models: TSE14C/TSE17C/TSB19C compressor for the vehicles listed above. Please send us a message if you have any questions.

-----Please make sure your vehicle is listed in the compatibility chart for proper fitment----

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