Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM1000000026Z48
Model Year Start: 2023 Model: Corolla Prod Date Range: [09/2022 -           ]
Title: HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for HV Model): P053015; Refrigerant Pressure Sensor Circuit Short to Battery or Open; 2023 - 2025 MY Corolla Corolla HV [09/2022 -        ]

DTC

P053015

Refrigerant Pressure Sensor Circuit Short to Battery or Open

DESCRIPTION

The air conditioning 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:

  • Open or short (+B) in air conditioning pressure sensor circuit

Detection Time:

  • Continuously for 4 seconds or more
  • Air conditioning 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 conditioning pressure sensor circuit

○

-

Short (+B) in air conditioning 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

CAUTION / NOTICE / HINT

NOTICE:

If DTC P05347A is output at the same time, perform troubleshooting for DTC P05347A first.

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HINT:

If a connector is disconnected or not installed correctly, securely connect it and check for DTCs.

PROCEDURE

1.

CHECK COMPARE REFRIGERANT GAS PRESSURE VALUES SHOWN ON GTS AND MANIFOLD GAUGE SET

(a) Install a manifold gauge set.

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

Body Electrical > Air Conditioner > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Regulator Pressure Sensor

Air conditioning pressure sensor

-32.768 to 32.767 MPaG

Actual refrigerant pressure displayed
  • Refrigerant line (gas leak etc.)
  • Air conditioning pressure sensor circuit malfunction

Body Electrical > Air Conditioner > Data List

Tester Display

Regulator Pressure Sensor

Result

Proceed to

Data List value and manifold gauge set value do not match

A

Data List value matches manifold gauge set value

B
B

INSPECT REFRIGERANT PRESSURE WITH MANIFOLD GAUGE SET

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for HFO-1234yf(R1234yf): Click here 2020 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 -        ]; HEATING / AIR CONDITIONING: REFRIGERANT (for HFO-1234yf(R1234yf)): ON-VEHICLE INSPECTION

A

2.

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

(a) Disconnect the A61 air conditioning pressure sensor connector.

*a

Front view of wire harness connector

(to Air Conditioning Pressure Sensor)

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

A61-1 (-) - Body ground

Always

Below 1 Ω
NG

GO TO STEP 8

OK

3.

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

(a) Disconnect the A61 air conditioning pressure sensor connector.

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

A61-2 (PR) - Body ground

Ignition switch ON

3.0 to 5.25 V

*a

Front view of wire harness connector

(to Air Conditioning Pressure Sensor)

Result

Proceed to

5.25 V or higher

A

3.0 to 5.25 V

B

Below 3.0 V

C
B

GO TO STEP 5

C

GO TO STEP 7

A

4.

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

(a) Disconnect the A61 air conditioning pressure sensor connector.

(b) Disconnect the I48 air conditioning amplifier assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

A61-2 (PR) or I48-6 (PRE) - Other terminals and body ground

Always

10 kΩ or higher
OK

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NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

5.

CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY (INTERNAL CIRCUIT RESISTANCE)

(a) Disconnect the A61 air conditioning pressure sensor connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

A61-3 (+) - A61-2 (PR)

Ignition switch off

180 to 220 kΩ

HINT:

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

*a

Front view of wire harness connector

(to Air Conditioning Pressure Sensor)
OK

REPLACE AIR CONDITIONING PRESSURE SENSOR

NG

6.

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

(a) Disconnect the A61 air conditioning pressure sensor connector.

(b) Disconnect the I48 air conditioning amplifier assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

A61-2 (PR) - A61-3 (+)

Always

10 kΩ or higher

I48-6 (PRE) - I48-11 (S5-3)

Always

10 kΩ or higher
OK

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NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

7.

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

(a) Disconnect the A61 air conditioning pressure sensor connector.

(b) Disconnect the I48 air conditioning amplifier assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

A61-2 (PR) - I48-6 (PRE)

Always

Below 1 Ω
OK

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NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

8.

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

(a) Disconnect the A61 air conditioning pressure sensor connector.

(b) Disconnect the I48 air conditioning amplifier assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

A61-1 (-) - I48-15 (SG-4)

Always

Below 1 Ω
OK

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NG

REPAIR OR REPLACE HARNESS OR CONNECTOR