Last Modified: 05-13-2024 |
6.11:8.1.0 |
Doc ID: RM1000000026Z8L |
Model Year Start: 2023 |
Model: GR Corolla |
Prod Date Range: [09/2022 - 11/2022] |
Title: HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for TMC Made, and Gasoline Model, with Automatic Air Conditioning System): P05347A; Refrigerant Gas Fluid Leak or Seal Failure; 2023 MY Corolla Corolla Hatchback GR Corolla [09/2022 - 11/2022] |
DTC
|
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
|
P05347A
|
Refrigerant Gas Fluid Leak or Seal Failure
|
Diagnosis Condition:
Malfunction:
Detection Time:
-
Air conditioning system operating time: 15 minutes or more
|
-
Refrigerant volume
-
Air conditioning pressure sensor
-
Harness or connector
-
Air conditioning amplifier assembly
|
Memorized
|
WIRING DIAGRAM
PROCEDURE
1.
|
CHECK REFRIGERANT PRESSURE
|
(a) Install a manifold gauge set.
Click here
(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)
|
(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 conditioning pressure sensor
|
-32768 to 32767 kPa(gauge)
|
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
|
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
|
|
|
2.
|
CHECK HARNESS AND CONNECTOR (AIR CONDITIONING PRESSURE SENSOR - POWER SOURCE)
|
(a) Disconnect the A61 air conditioning pressure sensor connector.
|
|
*a
|
Front view of wire harness connector
(to Air Conditioner Pressure Sensor)
|
|
|
(b) 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
|
OK
|
|
|
3.
|
CHECK HARNESS AND CONNECTOR (AIR CONDITIONING PRESSURE SENSOR - BODY GROUND)
|
(a) Disconnect the A61 air conditioning pressure sensor connector.
(b) 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
|
|
|
*a
|
Front view of wire harness connector
(to Air Conditioner Pressure Sensor)
|
|
|
OK
|
|
|
4.
|
CHECK HARNESS AND CONNECTOR (AIR CONDITIONING PRESSURE SENSOR - AIR CONDITIONING AMPLIFIER ASSEMBLY)
|
(a) Disconnect the A61 air conditioning pressure sensor connector.
(b) Disconnect the I48 air conditioning amplifier assembly connector.
(c) 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
|
NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR
|
OK
|
|
|
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.
(a) Connect the I48 air conditioning amplifier assembly connector.
(b) Connect the A61 air conditioning 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)
|
(d) Measure the voltage according to the value(s) in the table below.
*a
|
Component with harness connected
(Air Conditioning Amplifier Assembly)
|
-
|
-
|
Standard Voltage:
Tester Connection
|
Condition
|
Specified Condition
|
I48-6 (PRE) - Body ground
|
A/C Switch ON (When compressor with pulley assembly 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 conditioning pressure sensor
|
-32768 to 32767 kPa(gauge)
|
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
|
OK:
The voltage and value displayed in the Data List change.
Result
|
Proceed to
|
OK
|
A
|
NG (The voltage changes but the value displayed in the Data List does not change.)
|
NG (The voltage does not change.)
|
B
|
6.
|
CHECK HARNESS AND CONNECTOR (AIR CONDITIONING PRESSURE SENSOR - AIR CONDITIONING AMPLIFIER ASSEMBLY)
|
(a) Disconnect the A61 air conditioning pressure sensor connector.
(b) Disconnect the I48 air conditioning amplifier assembly connector.
(c) 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
|
NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR
|
7.
|
CHECK HARNESS AND CONNECTOR (AIR CONDITIONING PRESSURE SENSOR - AIR CONDITIONING AMPLIFIER ASSEMBLY)
|
(a) Disconnect the A61 air conditioning pressure sensor connector.
(b) Disconnect the I48 air conditioning amplifier assembly connector.
(c) 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
|
NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR
|
|