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Component Location

General Description

A/C pressure transducer consists of piezoelectric element and it detects A/C refrigerant pressure. Piezoelectric type is more advantageous to obtain linear data of pressure than existing switch type. Thus, optimum control of A/C compressor and fan is realized and improved fuel efficiency follows with it.

DTC Description

P0532 is set when the voltage below 0.18V - minimum voltage of A/C pressure transducer signal - is detected for more than 0.6 sec.. This code is due to open in power circuit or short to ground in signal circuit of A/C pressure transducer.

DTC Detecting Condition

Item	Detecting Condition			Possible Cause
DTC Strategy	• Voltage monitoring			• A/C pressure transducer circuit • A/C pressure transducer component
Enable Conditions	• IG key ON
Threshold Value	• When output voltage is below the minimum value (below 0.18V).
Diagnostic Time	• 0.6 sec.
Fail Safe	Fuel cut	NO	• -
	EGR Off	NO
	Fuel Limit	NO
	Check Lamp	ON

Specification

Diagnostic Circuit Diagram

note

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Signal Waveform & Data

Fig.1) Waveform of A/C pressure transducer in accordance with A/C operation. (A/C compressor operation)

☞ Output signal(voltage) changes in accordance with the amount of refrigerant and the change of weather occurs.

Check if normal pressure change in accordance with A/C compressor operation at normal pressure range shown in "Specification".