RM38T0EC _58 Vehicle Interior _104612 HEATING / AIR CONDITIONING _0601796 AIR CONDITIONING SYSTEM(for HEV Model) C

HEATING / AIR CONDITIONING  AIR CONDITIONING SYSTEM(for HEV 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.

DTC No. Detection Item DTC Detection Condition Trouble Area Memory
P053011 Refrigerant Pressure Sensor Circuit Short to Ground Diagnosis Condition:

Ignition switch ON


Malfunction Status:

Short in air conditioner pressure sensor circuit


Detection Time:

Continuously for 4 seconds or more


·

Air conditioner pressure sensor

·

Harness or connector

·

Air conditioning amplifier assembly


Memorized

WIRING DIAGRAM

E370470E48
2.146,0.396 2.302,0.594 0.156,0.198 10 false 3 2.156,0.865 2.313,1.063 0.156,0.198 10 false 2 2.156,1.344 2.313,1.542 0.156,0.198 10 false 1 1.948,0.396 2.104,0.594 0.156,0.198 10 false + 1.854,0.865 2.125,1.063 0.271,0.198 10 false PR 1.958,1.323 2.115,1.521 0.156,0.198 10 false - 0.375,1.99 0.646,2.188 0.271,0.198 10 false A61 0.365,2.167 2.531,2.385 2.167,0.219 10 false Air Conditioner Pressure Sensor 4.896,2 5.167,2.198 0.271,0.198 10 false I48 4.885,2.177 7.156,2.375 2.271,0.198 10 false Air Conditioning Amplifier Assembly 4.75,0.385 5.042,0.583 0.292,0.198 10 false 11 4.833,0.865 5.052,1.063 0.219,0.198 10 false 6 4.75,1.354 4.969,1.552 0.219,0.198 10 false 15 5.01,0.875 5.385,1.063 0.375,0.188 10 false PRE 5.01,0.396 5.385,0.583 0.375,0.188 10 false S5-3 5.01,1.344 5.385,1.531 0.375,0.188 10 false SG-4 5.729,0.313 6.104,0.5 0.375,0.188 10 false 5 V 6.469,0.979 6.844,1.167 0.375,0.188 10 false AD

PROCEDURE

1.CHECK REFRIGERANT PRESSURE
a.

Install a manifold gauge set.


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 Min.: -32.768 MPaG
Max.: 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

c.

Compare the values displayed in the Data List and on the manifold gauge set.


Result:
Result Proceed to
The values displayed in the Data List and on the manifold gauge set does not match A
The values displayed in the Data List and on the manifold gauge set match B



A

2.READ VALUE USING GTS

B

INSPECT REFRIGERANT PRESSURE WITH MANIFOLD GAUGE SET

Click hereVehicle Interior>HEATING / AIR CONDITIONING>REFRIGERANT>ON-VEHICLE INSPECTION


2.READ VALUE USING GTS
a.

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 Min.: -32.768 MPaG
Max.: 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 A61 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

3.CHECK TERMINAL VOLTAGE (AIR CONDITIONER PRESSURE SENSOR)

B

5.CHECK TERMINAL VOLTAGE (AIR CONDITIONING AMPLIFIER ASSEMBLY)
3.CHECK TERMINAL VOLTAGE (AIR CONDITIONER PRESSURE SENSOR)
a.
E419312C89
1.438,0.198 1.938,0.448 0.5,0.25 1.865,1.156 2.375,1.604 true 0.094,0.073 0.406,0.271 0.313,0.198 10 false *a 2.448,1.531 2.76,1.729 0.313,0.198 10 false + 1.573,0.25 1.885,0.448 0.313,0.198 10 false A61
*a Front view of wire harness connector
(to Air Conditioner Pressure Sensor)


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

Standard Voltage:
Tester Connection Switch Condition Specified Condition
A61-3 (+) - Body ground Ignition switch ON 4.75 to 5.25 V



Result:
Proceed to
OK
NG



OK

REPLACE AIR CONDITIONER PRESSURE SENSOR

Click hereVehicle Interior>HEATING / AIR CONDITIONING>AIR CONDITIONING PRESSURE SENSOR>REMOVAL


NG

4.CHECK HARNESS AND CONNECTOR (AIR CONDITIONER PRESSURE SENSOR - AIR CONDITIONING AMPLIFIER ASSEMBLY)
4.CHECK HARNESS AND CONNECTOR (AIR CONDITIONER PRESSURE SENSOR - AIR CONDITIONING AMPLIFIER ASSEMBLY)
a.

Disconnect the I48 air conditioning amplifier assembly connector.


b.

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

Standard Resistance:
Tester Connection Condition Specified Condition
A61-3 (+) - I48-11 (S5-3) Always Below 1 Ω



Result:
Proceed to
OK
NG



OK

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY

Click hereVehicle Interior>HEATING / AIR CONDITIONING>AIR CONDITIONING AMPLIFIER>REMOVAL


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

5.CHECK TERMINAL VOLTAGE (AIR CONDITIONING AMPLIFIER ASSEMBLY)
a.
E419312C90
1.438,0.198 1.938,0.448 0.5,0.25 1.698,1.156 2.188,1.688 true 0.094,0.073 0.406,0.271 0.313,0.198 10 false *a 2.25,1.615 2.563,1.813 0.313,0.198 10 false PR 1.573,0.25 1.885,0.448 0.313,0.198 10 false A61
*a Front view of wire harness connector
(to Air Conditioner Pressure Sensor)


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

Standard Voltage:
Tester Connection Switch Condition Specified Condition
A61-2 (PR) - Body ground Ignition switch ON 3.0 to 5.25 V



Result:
Proceed to
OK
NG



OK

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY

Click hereVehicle Interior>HEATING / AIR CONDITIONING>AIR CONDITIONING AMPLIFIER>REMOVAL


NG

6.CHECK HARNESS AND CONNECTOR (AIR CONDITIONER PRESSURE SENSOR - AIR CONDITIONING AMPLIFIER ASSEMBLY)
6.CHECK HARNESS AND CONNECTOR (AIR CONDITIONER PRESSURE SENSOR - AIR CONDITIONING AMPLIFIER ASSEMBLY)
a.

Disconnect the I48 air conditioning amplifier assembly connector.


b.

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



Result:
Proceed to
OK
NG



OK

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY

Click hereVehicle Interior>HEATING / AIR CONDITIONING>AIR CONDITIONING AMPLIFIER>REMOVAL


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR