DTC P0530-11: Refrigerant Pressure Sensor Circuit Short to Ground [11/2021 - ]: Procedure

1. Install a manifold gauge set.

   Refer to ON-VEHICLE INSPECTION [11/2021 - ]

2. 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

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

Result: 

B 

INSPECT REFRIGERANT PRESSURE WITH MANIFOLD GAUGE SET. Refer to  ON-VEHICLE INSPECTION [11/2021 - ] 

Result: 

A 

See step  2

1. 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 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

   OK

   Disconnecting the A17 connector of the air conditioning pressure sensor causes the Data List value to change.

   Result

   Result	Proceed to
   Regulator pressure sensor value changes	A
   Regulator pressure sensor value does not change	B

Result: 

B 

See step  5

Result: 

A 

See step  3

1. Disconnect the A17 air conditioning pressure sensor connector.
2. 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
   A17-3 (+) - Body ground	Ignition switch ON	4.75 to 5.25 V

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE AIR CONDITIONING PRESSURE SENSOR. Refer to  REMOVAL [11/2021 - ] 

Result: 

NG 

See step  4

1. Disconnect the A17 air conditioning pressure sensor connector.
2. Disconnect the D53 air conditioning amplifier assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A17-3 (+) - D53-11 (S5-3)	Always	Below 1 Ω

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY. Refer to  REMOVAL [11/2021 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

1. Disconnect the A17 air conditioning pressure sensor connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

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

   Standard Voltage

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

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY. Refer to  REMOVAL [11/2021 - ] 

Result: 

NG 

See step  6

1. Disconnect the A17 air conditioning pressure sensor connector.
2. Disconnect the D53 air conditioning amplifier assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A17-2 (PR) or D53-6 (PRE) - Other terminals and body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY. Refer to  REMOVAL [11/2021 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR