Ignition "ON"
Using the scan tool.
Check the output voltage of AQS between terminals 2 and 3.
Condition | Output signal | Fresh/recirculation |
Heating Condition (IG "ON") | 2.5 ± 0.5V | Prevlous |
Normal Condition | 4.3 ± 0.5V | Fresh |
Hazardous gas detection | 0.9 ± 0.5V | Recirculation |
AQS diagnosis and fail safe
Detect the signal without choosing the AQS switch.
If 2.5V or more is detected for 3.5 seconds or more among 7 seconds, be judged the open of AQS signal.
Operate as below fail safe function, while choosing AQS.
Fail safe: Release the AQS (AQS cannot be selected), Fresh/recirculation maintains previous situation of AQS selection.
When IG is turned ON, AQS heats for 34±5 seconds, it will output below 2.5 voltage during this time.
