DTC B1546
Precautions: Precautions for Diagnosing Trouble · General safety (00)
DTC Detecting Condition and Trouble Area
| DTC detecting condition | Trouble area |
|---|---|
|
B1546: A/C Refrigerant Pressure Malfunction A/C refrigerant pressure is less than specified value, though outside air temperature is more than specified value. |
•A/C refrigerant pressure sensor
•Outside air temperature sensor •Insufficient of refrigerant •HVAC control module |
DTC Confirmation Procedure
1)Start engine and operate A/C system.
DTC Troubleshooting
| Step | Action | Yes | No |
|---|---|---|---|
| 1 |
A/C refrigerant pressure check
1)Turn on A/C switch and operate compressor.
2)Check “Refrigerant Pressure” using “Data list” mode on SUZUKI scan tool.
Is pressure over 0.34 MPa?
|
Go to Step 2.
|
Charge refrigerant and recheck DTC.
|
| 2 |
A/C refrigerant pressure sensor check
1)Check A/C refrigerant pressure sensor.
Is sensor in good condition?
|
Go to Step 3.
|
Replace A/C refrigerant pressure sensor.
|
| 3 |
Outside air temperature sensor check
1)Check outside air temperature sensor.
Is sensor in good condition?
|
Go to Step 4.
|
Replace outside air temperature sensor.
|
| 4 |
A/C system check
1)Check A/C system.
Is system in good condition?
|
Replace HVAC control module and recheck DTC.
|
Perform Trouble Diagnosis for Abnormal Pressure:Automatic Type and recheck DTC.
|