Toyota Yaris: Air Conditioning System / Refrigerant Pressure Sensor Circuit Short to Battery or Open (P053015)

Toyota Yaris XP210 (2020-2024) Reapir and Service Manual / Vehicle Interior / Heating / Air Conditioning / Air Conditioning System / Refrigerant Pressure Sensor Circuit Short to Battery or Open (P053015)

DESCRIPTION

The air conditioner pressure sensor, which is installed to the high pressure side pipe to detect refrigerant pressure, sends a refrigerant pressure signal to the air conditioning amplifier assembly. The air conditioning amplifier assembly converts this signal to a pressure value according to the sensor characteristics and uses it to control the compressor.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

Memory

P053015

Refrigerant Pressure Sensor Circuit Short to Battery or Open

Diagnosis Condition:

  • Ignition switch ON

Malfunction Status:

  • Open or short in air conditioner pressure sensor circuit

Detection Time:

  • Continuously for 4 seconds or more
  • Air conditioner pressure sensor
  • Harness or connector
  • Air conditioning amplifier assembly

Memorized

DTC Detection Condition Combination Table
 

Vehicle Condition

Pattern 1

Pattern 2

Diagnosis Condition

Ignition switch ON

Malfunction

Open in air conditioner pressure sensor circuit

-

Short in air conditioner pressure sensor circuit

-

Detection Time

Continuously for 4 seconds or more

Continuously for 4 seconds or more

Trip Count

1 trip

1 trip

HINT:

If the conditions of either of these patterns are detected, a DTC will be stored

WIRING DIAGRAM

PROCEDURE

1.

CHECK REGULATOR PRESSURE SENSOR

(a) Install a manifold gauge set.

(b) Read the Data List according to the display on the GTS.

Body Electrical > Air Conditioner > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Regulator Pressure Sensor

Air conditioner pressure sensor

Min.: -32.768 MPaG

Max.: 32.767 MPaG

Actual refrigerant pressure displayed

  • Refrigerant line (gas leak etc.)
  • Air conditioner pressure sensor circuit malfunction
Body Electrical > Air Conditioner > Data List

Tester Display

Regulator Pressure Sensor

(c) Compare the values displayed in the Data List and on the manifold gauge set.

Result

Proceed to

The values displayed in the Data List and on the manifold gauge set does not match

A

The values displayed in the Data List and on the manifold gauge set match

B

B

INSPECT REFRIGERANT PRESSURE WITH MANIFOLD GAUGE SET

A

2.

CHECK HARNESS AND CONNECTOR (AIR CONDITIONER PRESSURE SENSOR - BODY GROUND)

(a) Disconnect the A51 air conditioner pressure sensor connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Switch Condition

Specified Condition

A51-1 (-) - Body ground

Always

Below 1 Ω

NG

GO TO STEP 8

OK

3.

CHECK TERMINAL VOLTAGE

(a) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

A51-2 (PR) - Body ground

Ignition switch ON

3.0 to 5.25 V

*a

Front view of wire harness connector

(to Air Conditioner Pressure Sensor)

Result

Proceed to

Higher than 5.25 V

A

3.0 to 5.25 V

B

Less than 3.0V

C

B

GO TO STEP 5

C

GO TO STEP 7

A

4.

CHECK HARNESS AND CONNECTOR (AIR CONDITIONER PRESSURE SENSOR - AIR CONDITIONING AMPLIFIER ASSEMBLY)

(a) Disconnect the H25 air conditioning amplifier assembly connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

A51-2 (PR) or H25-6 (PRE) - Other terminals and body ground

Always

10 kΩ or higher

OK

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

5.

CHECK INTERNAL CIRCUIT RESISTANCE (AIR CONDITIONING AMPLIFIER ASSEMBLY)

(a) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

A51-3 (+) - A51-2 (PR)

Ignition switch off

180 to 220 kΩ

HINT:

After turning the ignition switch off, wait at least 30 seconds before performing the measurement.

OK

REPLACE AIR CONDITIONER PRESSURE SENSOR

NG

6.

CHECK HARNESS AND CONNECTOR (AIR CONDITIONER PRESSURE SENSOR - AIR CONDITIONING AMPLIFIER ASSEMBLY)

(a) Disconnect the H25 air conditioning amplifier assembly connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

A51-2 (PR) or H25-6 (PRE) - A51-3 (+) or H25-11 (S5-3)

Always

10 kΩ or higher

OK

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

7.

CHECK HARNESS AND CONNECTOR (AIR CONDITIONER PRESSURE SENSOR - AIR CONDITIONING AMPLIFIER ASSEMBLY)

(a) Disconnect the H25 air conditioning amplifier assembly connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

A51-2 (PR) - H25-6 (PRE)

Always

Below 1 Ω

OK

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

8.

CHECK HARNESS AND CONNECTOR (AIR CONDITIONER PRESSURE SENSOR - AIR CONDITIONING AMPLIFIER ASSEMBLY)

(a) Disconnect the H25 air conditioning amplifier assembly connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

A51-1 (-) - H25-15 (SG-4)

Always

Below 1 Ω

OK

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

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