Scantool Diagnostics
Air Conditioner
B1257 AQS Sensor Open - Scantool Diagnostics
Monitor Scantool data
1. Connect scantool with diagnostic connector.
2. Warm up the engine to normal engine temperature after engine starts.
3. Select and monitor "AQS sensor" parameter on scantool.
Fig.1) The current data in normal state.
4. Is the AQS sensor abnormal?