HEATING / AIR CONDITIONING AIR CONDITIONING SYSTEM(for HV Model (8ZR-FXE)) P053011 Refrigerant Pressure Sensor Circuit Short to Ground
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.
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 |
|---|---|---|---|---|
| P053011 | Refrigerant Pressure Sensor Circuit Short to Ground | Diagnosis Condition:
Ignition switch ON Malfunction: Short (GND) in air conditioning pressure sensor circuit Detection Time: Continuously for 4 seconds or more |
·
Refrigerant volume ·
Air conditioning pressure sensor ·
Harness or connector ·
Air conditioning amplifier assembly |
Memorized |
WIRING DIAGRAM
PROCEDURE
Install a manifold gauge set.
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 - 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
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 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 - 50003 450 106
- OK:
Disconnecting the A61 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
A
B
Disconnect the A61 air conditioning pressure sensor connector.
| *a | Front view of wire harness connector
(to Air Conditioning Pressure Sensor) |
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
Tester Connection Condition Specified Condition A61-3 (+) - Body ground Ignition switch ON 4.75 to 5.25 V
- Result:
Proceed to OK NG
OK
NG
Disconnect the A61 air conditioning pressure sensor connector.
Disconnect the I49 air conditioning amplifier assembly connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition A61-3 (+) - I49-15 (S5-3) Always Below 1 Ω
- Result:
Proceed to OK NG
OK
NG
| *a | Front view of wire harness connector
(to Air Conditioning Pressure Sensor) |
Disconnect the A61 air conditioning pressure sensor connector.
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
- Result:
Proceed to OK NG
OK
NG
Disconnect the A61 air conditioning pressure sensor connector.
Disconnect the I49 air conditioning amplifier assembly connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition A61-2 (PR) or I49-16 (PRE) - Other terminals and body ground Always 10 kΩ or higher
- Result:
Proceed to OK NG
OK
NG