Toyota Corolla (E170): Automatic air conditioning system

Air outlets and fan speed are automatically adjusted according to the temperature setting.

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Monitor description
Dtc p0451, p0452 or p0453 is recorded by the ecm when the vapor pressure sensor malfunctions. P0451 The ecm senses pressure in the fuel tank using the vapor pressure sensor. The ecm supplies the sensor with a regulated 5 v reference–voltage and the sensor returns a signal voltage betwee ...

On–vehicle inspection
1. Connect hand–held tester:  connect the hand–held tester to the dlc3.  start the engine and run it at idle.  select the active test mode on the hand–held tester. Hint: please refer to the hand–held tester operator’s manual for further details. 2. Inspect actua ...

Sound quality is bad in all modes (volume is too low)
Wiring diagram Inspection procedure 1 Adjust sound quality Adjust the sound quality.  Operate the radio receiver assy to adjust the sound quality. Standard: malfunction disappear. 2 Compare it with another car of same model Compare it with another vehicle of the same mo ...