HEATING / AIR CONDITIONING AIR CONDITIONING SYSTEM(for Gasoline Model) P053011 Refrigerant Pressure Sensor Circuit Short to Ground
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.
This DTC is stored if refrigerant pressure on the high pressure side is extremely low.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | Memory | DTC Output from | Priority |
|---|---|---|---|---|---|---|
| P053011 | Refrigerant Pressure Sensor Circuit Short to Ground | Diagnosis Condition:
Ignition switch ON Malfunction: Short (GND) in air conditioner pressure sensor circuit Detection Time: Continuously for 4 seconds or more |
·
Refrigerant volume ·
Air conditioner pressure sensor ·
Harness or connector ·
Air conditioning amplifier assembly |
Memorized | Air Conditioner | A |
WIRING DIAGRAM
PROCEDURE
Pre-procedure1
Install a manifold gauge set.
Procedure1
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 conditioner pressure sensor -32.768 to 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 - 50003 450 106
- 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
A
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 -32.768 to 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 - 50003 450 106
- OK:
Disconnecting the A22 connector of the air conditioner 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
A
B
Pre-procedure1
Disconnect the A22 air conditioner pressure sensor connector.
Procedure1
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
Tester Connection Condition Specified Condition Click Location & Routing(A22)Location & Routingewd_type=routing;type=c;code=A22
Click Connector(A22)Engine Compartment>Engine Room Main Wire / Transmission Wire>Air Conditioning Pressure Sensorewd_type=component;type=c;code=A22;pinno=3
A22-3 (+) - Body ground Ignition switch ON 4.75 to 5.25 V
- Result:
Proceed to OK NG
Post-procedure1
None
OK
NG
Pre-procedure1
Disconnect the A22 air conditioner pressure sensor connector.
Disconnect the E45 air conditioning amplifier assembly connector.
Procedure1
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition Click Location & Routing(A22,E45)Location & Routingewd_type=routing;type=c,c;code=A22,E45
Click Connector(A22)Engine Compartment>Engine Room Main Wire / Transmission Wire>Air Conditioning Pressure Sensorewd_type=component;type=c;code=A22;pinno=3
Click Connector(E45)Instrument Panel>Instrument Panel Wire / Radio Wiring Sub-Assy / Telephone Computer Wire>Air Conditioning Amplifier Assemblyewd_type=component;type=c;code=E45;pinno=11
A22-3 (+) - E45-11 (S5-3) Always Below 1 Ω
- Result:
Proceed to OK NG
Post-procedure1
None
OK
NG
Pre-procedure1
Disconnect the A22 air conditioner pressure sensor connector.
Procedure1
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
Tester Connection Condition Specified Condition Click Location & Routing(A22)Location & Routingewd_type=routing;type=c;code=A22
Click Connector(A22)Engine Compartment>Engine Room Main Wire / Transmission Wire>Air Conditioning Pressure Sensorewd_type=component;type=c;code=A22;pinno=2
A22-2 (PR) - Body ground Ignition switch ON 3.0 to 5.25 V
- Result:
Proceed to OK NG
Post-procedure1
None
OK
NG
Pre-procedure1
Disconnect the A22 air conditioner pressure sensor connector.
Disconnect the E45 air conditioning amplifier assembly connector.
Procedure1
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition Click Location & Routing(A22,E45)Location & Routingewd_type=routing;type=c,c;code=A22,E45
Click Connector(A22)Engine Compartment>Engine Room Main Wire / Transmission Wire>Air Conditioning Pressure Sensorewd_type=component;type=c;code=A22;pinno=2
Click Connector(E45)Instrument Panel>Instrument Panel Wire / Radio Wiring Sub-Assy / Telephone Computer Wire>Air Conditioning Amplifier Assemblyewd_type=component;type=c;code=E45;pinno=6
A22-2 (PR) or E45-6 (PRE) - Other terminals and body ground Always 10 kΩ or higher
- Result:
Proceed to OK NG
Post-procedure1
None
OK
NG