HEATING / AIR CONDITIONING AIR CONDITIONING SYSTEM(for HEV 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.
If the amount of refrigerant is insufficient, the A/C switch indicator will turn off and the air conditioning system will stop operating.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | Memory |
|---|---|---|---|---|
| P05347A | Refrigerant Gas Fluid Leak or Seal Failure | Diagnosis Condition:
Refrigerant shortage check is satisfied in normal operation Malfunction Status: Amount of refrigerant is insufficient Detection Time: Air conditioning system operating 15 minutes or more |
·
Refrigerant line ·
Cooler expansion valve ·
Air conditioner pressure sensor ·
Harness or connector ·
Air conditioning amplifier assembly |
Memorized |
WIRING DIAGRAM
PROCEDURE
Install a manifold gauge set.
Read the manifold gauge set with the following conditions met.
| Item | Condition |
|---|---|
| Vehicle doors | Fully open |
| Temperature setting | MAX COLD |
| Blower speed | HI |
| A/C switch | On |
| Recirculation/fresh switch | RECIRCULATION |
| Interior temperature | 25 to 35°C (77 to 95°F) |
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 MPaGActual 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
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 match A The values displayed in the Data List and on the manifold gauge set does not match B
A
B
| *a | Front view of wire harness connector
(to Air Conditioner Pressure Sensor) |
Disconnect the A61 air conditioner pressure sensor connector.
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
NG
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition A61-1 (-) - Body ground Always Below 1 Ω
- Result:
Proceed to OK NG
OK
NG
Disconnect the I48 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) - I48-6 (PRE) Always Below 1 Ω A61-2 (PR) or I48-6 (PRE) - Other terminals and body ground Always 10 kΩ or higher
- Result:
Proceed to OK NG
OK
NG
- NOTICE:
- ·
If refrigerant pressure on the high pressure side becomes extremely high during the inspection (if the voltage exceeds 4.61 V), a fail-safe function will stop compressor operation. In this case, make sure to measure the voltage before the fail-safe function operates.
·It is necessary to measure the voltage for a certain amount of time (approximately 10 minutes) because the malfunction may recur after a while.
Connect the air conditioning amplifier assembly connector.
Measure the voltage with the following conditions met.
| Item | Condition |
|---|---|
| Vehicle doors | Fully open |
| Temperature setting | MAX COLD |
| Blower speed | HI |
| A/C switch | On |
| Recirculation/fresh switch | RECIRCULATION |
| Interior temperature | 25 to 35°C (77 to 95°F) |
| *a | Component with harness connected
(Air Conditioning Amplifier Assembly) |
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
Tester Connection Condition Specified Condition I48-6 (PRE) - Body ground ·A/C switch on
(Compressor operating)
·Sensor voltage is 5 V
0.62 to 4.73 V
- HINT:
-
When the ambient air temperature is low (below -1.5°C (29.3°F)), the compressor with pulley assembly will be stopped, due to inputs of the thermistor assembly and No. 1 cooler thermistor, to prevent the evaporator from freezing. In this case, perform the inspection in a warm indoor environment.
- OK:
The voltage value changes.
- Result:
Proceed to OK NG
OK
NG
- NOTICE:
- ·
If refrigerant pressure on the high pressure side becomes extremely high during the inspection (if the voltage exceeds 4.61 V), a fail-safe function will stop compressor operation. In this case, make sure to measure the voltage before the fail-safe function operates.
·It is necessary to measure the voltage for a certain amount of time (approximately 10 minutes) because the malfunction may recur after a while.
Measure the voltage with the following conditions met.
| Item | Condition |
|---|---|
| Vehicle doors | Fully open |
| Temperature setting | MAX COLD |
| Blower speed | HI |
| A/C switch | On |
| Recirculation/fresh switch | RECIRCULATION |
| Interior temperature | 25 to 35°C (77 to 95°F) |
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 MPaGActual 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
- HINT:
-
When the ambient air temperature is low (below -1.5°C (29.3°F)), the compressor with pulley assembly will be stopped, due to inputs of the thermistor assembly and No. 1 cooler thermistor, to prevent the evaporator from freezing. In this case, perform the inspection in a warm indoor environment.
- OK:
The value displayed in the Data List changes.
- Result:
Proceed to OK NG
OK
NG
Disconnect the I48 air conditioning amplifier assembly connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition A61-1 (-) - I48-15 (SG-4) Always Below 1 Ω A61-1 (-) or I48-15 (SG-4) - Other terminals and body ground Always 10 kΩ or higher
- Result:
Proceed to OK NG
OK
NG
Disconnect the I48 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 (+) - I48-11 (S5-3) Always Below 1 Ω A61-3 (+) or I48-11 (S5-3) - Other terminals and body ground Always 10 kΩ or higher
- Result:
Proceed to OK NG
OK
NG