Category:
Common Issues
Note that for this verification we are using the default “New Lambda (10-18AFR)” type for AN1 / LAMBDA1 channel
Verifying the Heating Up phase
The controller will provide 2 different voltages / outputs for the heating-up and steady phases
- During the first seconds, the controller is in the heating-up phase and will output aprox 2.5V in the output, 14 AFR in the software.
- Once the lambda has reached its working temperature at free air, it will output 5V or 18 AFR (aprox). The sensor should be hot, be careful if touching it
Possible issues:
· The lambda is not physically hot: Check that the voltage provided by the small 12V power supply is stable at 12V with a multimeter (with the controller and the lambda connected).
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- If the voltage is low then the power supply could be faulty
- If the voltage is 12V normally means that the controller is faulty
- The lambda is hot, but the output stays at 2.5V / 14 AFR, normally this means that the controller is faulty, but check it with another lambda sensor if possible
Verifying the Operating phase
- Apply gas from a lighter (no flame) directly in the lambda sensor orifice, the output should go low fast: 0V / 10 AFR
- Remove the lighter and allow the gas to disipate (or blow the sensor to make it faster), the output should go back to 5V / 18 AFR
Note: if you are having issues with the connection to the DAQ and the software, the voltages can be directly verified in the 6 pin connector from the Lambda Controller at pin 4 (signal) vs pin 5 GND, or at the square plastic connector (check the wires colours in the controller)