DTC P0530-15: Refrigerant Pressure Sensor Circuit Short to Battery or Open [08/2023 - ]: Procedure

Pre-procedure1

• Install a manifold gauge set.

  HINT: 

  Refer to ON-VEHICLE INSPECTION [10/2022 - ]

• 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	-32768 to 32767 kPa(gauge) (-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

  Result	Proceed to
  Data List value and manifold gauge set value do not match	A
  Data List value matches manifold gauge set value	B

Post-procedure1

• None

Result: 

B 

INSPECT REFRIGERANT PRESSURE WITH MANIFOLD GAUGE SET. Refer to  ON-VEHICLE INSPECTION [10/2022 - ] 

Result: 

A 

See step  2

Pre-procedure1

• Disconnect the A17 air conditioning pressure sensor connector.

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

  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

  *a	Front view of wire harness connector (to Air Conditioning Pressure Sensor)

  Standard Resistance

  Tester Connection	Condition	Specified Condition	Result
  A17-1 (-) - Body ground	Always	Below 1 Ω	Ω

  Result

  Proceed to
  OK
  NG

Post-procedure1

• None

Result: 

NG 

See step  8

Result: 

OK 

See step  3

Pre-procedure1

• Disconnect the A17 air conditioning pressure sensor connector.

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

  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

  *a	Front view of wire harness connector (to Air Conditioning Pressure Sensor)

  Standard Voltage

  Tester Connection	Condition	Specified Condition	Result
  A17-2 (PR) - Body ground	Ignition switch ON	3.0 to 5.25 V	V

  Result

  Result	Proceed to
  A17-2 (PR) - Body ground is more than 5.25 V	A
  A17-2 (PR) - Body ground is more than or equal to 3.0 and less than or equal to 5.25 V	B
  A17-2 (PR) - Body ground is less than 3.0 V	C

Post-procedure1

• None

Result: 

B 

See step  5

Result: 

C 

See step  7

Result: 

A 

See step  4

Pre-procedure1

• Disconnect the A17 air conditioning pressure sensor connector.
• Disconnect the C48 air conditioning amplifier assembly connector.

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

  Standard Resistance

  Tester Connection	Condition	Specified Condition	Result
  A17-2 (PR) or C48-6 (PRE) - Other terminals and body ground	Always	10 kΩ or higher	kΩ

  Result

  Proceed to
  OK
  NG

Post-procedure1

• None

Result: 

OK 

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY. Refer to  REMOVAL [10/2022 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Pre-procedure1

• Disconnect the A17 air conditioning pressure sensor connector.

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

  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

  *a	Front view of wire harness connector (to Air Conditioning Pressure Sensor)

  Standard Resistance

  Tester Connection	Condition	Specified Condition	Result
  A17-3 (+) - A17-2 (PR)	Ignition switch off	180 to 220 kΩ	kΩ

  HINT: 

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

  Result

  Proceed to
  OK
  NG

Post-procedure1

• None

Result: 

OK 

REPLACE AIR CONDITIONING PRESSURE SENSOR. Refer to  REMOVAL [08/2023 - ] 

Result: 

NG 

See step  6

Pre-procedure1

• Disconnect the A17 air conditioning pressure sensor connector.
• Disconnect the C48 air conditioning amplifier assembly connector.

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

  Standard Resistance

  Tester Connection	Condition	Specified Condition	Result
  A17-2 (PR) - A17-3 (+)	Always	10 kΩ or higher	kΩ
  C48-6 (PRE) - C48-11 (S5-3)	Always	10 kΩ or higher	kΩ

  Result

  Proceed to
  OK
  NG

Post-procedure1

• None

Result: 

OK 

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY. Refer to  REMOVAL [10/2022 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Pre-procedure1

• Disconnect the A17 air conditioning pressure sensor connector.
• Disconnect the C48 air conditioning amplifier assembly connector.

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

  Standard Resistance

  Tester Connection	Condition	Specified Condition	Result
  A17-2 (PR) - C48-6 (PRE)	Always	Below 1 Ω	Ω

  Result

  Proceed to
  OK
  NG

Post-procedure1

• None

Result: 

OK 

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY. Refer to  REMOVAL [10/2022 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Pre-procedure1

• Disconnect the A17 air conditioning pressure sensor connector.
• Disconnect the C48 air conditioning amplifier assembly connector.

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

  Standard Resistance

  Tester Connection	Condition	Specified Condition	Result
  A17-1 (-) - C48-15 (SG-4)	Always	Below 1 Ω	Ω

  Result

  Proceed to
  OK
  NG

Post-procedure1

• None

Result: 

OK 

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY. Refer to  REMOVAL [10/2022 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR