RM38N0EC _58 Vehicle Interior _111841 HEATING / AIR CONDITIONING _0499788 AIR CONDITIONING SYSTEM(for Gasoline Model) C

HEATING / AIR CONDITIONING  AIR CONDITIONING SYSTEM(for Gasoline Model)  P05347A  Refrigerant Gas Fluid Leak or Seal Failure  


DESCRIPTION

This DTC is stored if the amount of refrigerant in the air conditioning system is insufficient.

The air conditioning amplifier assembly receives the ambient temperature signal, refrigerant pressure signal, etc. from various sensors.

Based on these signals, the air conditioning amplifier assembly detects the amount of refrigerant.

The A/C switch indicator is turned off and the air conditioning system is stopped if the amount of refrigerant is insufficient.

DTC No. Detection Item DTC Detection Condition Trouble Area Memory DTC Output from Priority
P05347A Refrigerant Gas Fluid Leak or Seal Failure Diagnosis Condition:

Normal operation refrigerant amount check conditions are met.

The following condition is detected in the normal operation refrigerant shortage check


Malfunction:

Amount of refrigerant is judged to be insufficient by normal operation refrigerant amount check.

Amount of refrigerant is insufficient


Detection Time:

Air conditioning system operating time: 15 minutes or more


·

Refrigerant volume

·

Air conditioner pressure sensor

·

Harness or connector

·

Air conditioning amplifier assembly


Memorized Air Conditioner A

WIRING DIAGRAM

E432279E02
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 - 0.344,1.99 0.698,2.188 0.354,0.198 10 false A22 0.344,2.156 2.51,2.375 2.167,0.219 10 false Air Conditioner Pressure Sensor 4.813,1.99 7.021,2.229 2.208,0.24 10 false Air Conditioning Amplifier Assembly 4.667,0.313 4.917,0.542 0.25,0.229 10 false 11 4.698,0.792 4.917,0.99 0.219,0.198 10 false 6 4.656,1.26 4.917,1.469 0.26,0.208 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 4.604,0.51 4.938,0.74 0.333,0.229 10 false E45 4.604,0.99 4.958,1.198 0.354,0.208 10 false E45 4.604,1.469 4.948,1.677 0.344,0.208 10 false E45

PROCEDURE

1.CHECK REFRIGERANT PRESSURE

Pre-procedure1

a.

Install a manifold gauge set.


b.

Prepare the vehicle according to the table below.

Measurement Condition:
Item Condition
Doors Fully open
A/C Switch On
Recirculation/fresh Control Switch Recirculation
Set Temperature MAX COLD
Blower Speed HI
Air Conditioning Air Inlet Temperature 25 to 35°C (77 to 95°F)


Procedure1

c.

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

d.

None



A

2.CHECK HARNESS AND CONNECTOR (AIR CONDITIONER PRESSURE SENSOR - POWER SOURCE)

B

INSPECT REFRIGERANT PRESSURE WITH MANIFOLD GAUGE SET

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


2.CHECK HARNESS AND CONNECTOR (AIR CONDITIONER PRESSURE SENSOR - POWER SOURCE)

Pre-procedure1

a.

Disconnect the A22 air conditioner pressure sensor connector.


Procedure1

b.

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

Standard Voltage:
Tester Connection Condition Specified Condition

Click Location & Routing(A22)Location & Routing

Click Connector(A22)Engine Compartment>Engine Room Main Wire / Transmission Wire>Air Conditioning Pressure Sensor

A22-3 (+) - Body ground Ignition switch ON 4.75 to 5.25 V


Result:
Proceed to
OK
NG



Post-procedure1

c.

None



OK

3.CHECK HARNESS AND CONNECTOR (AIR CONDITIONER PRESSURE SENSOR - BODY GROUND)

NG

7.CHECK HARNESS AND CONNECTOR (AIR CONDITIONER PRESSURE SENSOR - AIR CONDITIONING AMPLIFIER ASSEMBLY)
3.CHECK HARNESS AND CONNECTOR (AIR CONDITIONER PRESSURE SENSOR - BODY GROUND)

Pre-procedure1

a.

Disconnect the A22 air conditioner pressure sensor connector.


Procedure1

b.

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

Standard Resistance:
Tester Connection Condition Specified Condition

Click Location & Routing(A22)Location & Routing

Click Connector(A22)Engine Compartment>Engine Room Main Wire / Transmission Wire>Air Conditioning Pressure Sensor

A22-1 (-) - Body ground Always Below 1 Ω


Result:
Proceed to
OK
NG



Post-procedure1

c.

None



OK

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

NG

6.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)

Pre-procedure1

a.

Disconnect the A22 air conditioner pressure sensor connector.


b.

Disconnect the E45 air conditioning amplifier assembly connector.


Procedure1

c.

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 & Routing

Click Connector(A22)Engine Compartment>Engine Room Main Wire / Transmission Wire>Air Conditioning Pressure Sensor

Click Connector(E45)Instrument Panel>Instrument Panel Wire / Radio Wiring Sub-Assy / Telephone Computer Wire>Air Conditioning Amplifier Assembly

A22-2 (PR) - E45-6 (PRE) Always Below 1 Ω
A22-2 (PR) or E45-6 (PRE) - Other terminals and body ground Always 10 kΩ or higher


Result:
Proceed to
OK
NG



Post-procedure1

d.

None



OK

5.INSPECT AIR CONDITIONING AMPLIFIER ASSEMBLY (SENSOR SIGNAL CIRCUIT)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

5.INSPECT AIR CONDITIONING AMPLIFIER ASSEMBLY (SENSOR SIGNAL CIRCUIT)
NOTICE:
·

If refrigerant pressure on the high pressure side becomes extremely high, the fail-safe function stops compressor operation.

·

It is necessary to measure the voltage for a certain amount of time (approximately 10 minutes) because the malfunction may recur after a while.



HINT:

When the outside air temperature is low (below -1.5°C (29.3°F)), the compressor stops due to operation of the ambient temp. sensor (thermistor assembly) and the evaporator temp. sensor (No. 1 cooler thermistor) to prevent the evaporator from freezing. In this case, perform the inspection in a warm indoor environment.


Pre-procedure1

a.

Connect the E45 air conditioning amplifier assembly connector.


b.

Connect the A22 air conditioner pressure sensor connector.


c.

Prepare the vehicle according to the table below.

Measurement Condition:
Item Condition
Doors Fully open
A/C Switch On
Recirculation/fresh Control Switch Recirculation
Set Temperature MAX COLD
Blower Speed HI
Air Conditioning Air Inlet Temperature 25 to 35°C (77 to 95°F)


Procedure1

d.

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

w/o Seat Heater System:
E445155C02
2.302,0.313 2.708,0.563 0.406,0.25 2.677,1.281 2.948,1.969 true 1.917,0.208 2.229,0.365 0.313,0.156 10 false *a 2.396,0.375 2.854,0.573 0.458,0.198 10 false E45 2.865,2.01 3.479,2.208 0.615,0.198 10 false PRE
*a Component with harness connected
(Air Conditioning Amplifier Assembly) 		- -


w/ Seat Heater System:
E445156C02
3.708,0.271 4.135,0.521 0.427,0.25 4.375,1.948 4.094,1.281 true 3.333,0.156 3.646,0.313 0.313,0.156 10 false *a 3.813,0.333 4.271,0.531 0.458,0.198 10 false E45 4.323,1.99 4.938,2.188 0.615,0.198 10 false PRE
*a Component with harness connected
(Air Conditioning Amplifier Assembly) 		- -


Standard Voltage:
Tester Connection Condition Specified Condition

Click Location & Routing(E45)Location & Routing

Click Connector(E45)Instrument Panel>Instrument Panel Wire / Radio Wiring Sub-Assy / Telephone Computer Wire>Air Conditioning Amplifier Assembly

E45-6 (PRE) - Body ground A/C Switch ON (When compressor assembly with pulley running) 0.74 to 4.61 V



e.

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:

The voltage and value displayed in the Data List change.


Result:
Result Proceed to
OK A
NG (The voltage changes but the value displayed in the Data List does not change.) B
NG (The voltage does not change.) C



Post-procedure1

f.

None



A

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY

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


B

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY

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


C

REPLACE AIR CONDITIONER PRESSURE SENSOR

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


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

Pre-procedure1

a.

Disconnect the A22 air conditioner pressure sensor connector.


b.

Disconnect the E45 air conditioning amplifier assembly connector.


Procedure1

c.

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 & Routing

Click Connector(A22)Engine Compartment>Engine Room Main Wire / Transmission Wire>Air Conditioning Pressure Sensor

Click Connector(E45)Instrument Panel>Instrument Panel Wire / Radio Wiring Sub-Assy / Telephone Computer Wire>Air Conditioning Amplifier Assembly

A22-1 (-) - E45-15 (SG-4) Always Below 1 Ω
A22-1 (-) or E45-15 (SG-4) - Other terminals and body ground Always 10 kΩ or higher


Result:
Proceed to
OK
NG



Post-procedure1

d.

None



OK

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY

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


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

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

Pre-procedure1

a.

Disconnect the A22 air conditioner pressure sensor connector.


b.

Disconnect the E45 air conditioning amplifier assembly connector.


Procedure1

c.

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 & Routing

Click Connector(A22)Engine Compartment>Engine Room Main Wire / Transmission Wire>Air Conditioning Pressure Sensor

Click Connector(E45)Instrument Panel>Instrument Panel Wire / Radio Wiring Sub-Assy / Telephone Computer Wire>Air Conditioning Amplifier Assembly

A22-3 (+) - E45-11 (S5-3) Always Below 1 Ω
A22-3 (+) or E45-11 (S5-3) - Other terminals and body ground Always 10 kΩ or higher


Result:
Proceed to
OK
NG



Post-procedure1

d.

None



OK

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY

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


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR