1999 Mazda Capella
No faults were indicated by the scan tool, so faults were created by Lecturer Steve.
After faults were created; vehicle was scanned again.
New faults were found as follows:
Comparing the value data before and after the faults:
-IAT temperature was originally 24.21, now 19.85 degrees Celsius
-MAF voltage was originally 1.88v, now 0.00 volts
When inspecting the engine bay, the IAT and MAF sensors were found loose or unplugged.
Both sensors were reconnected.
Scan tool was used again after sensors were reconnected, and these are the results.
The readings returned to normal.
Without knowing these parameters, it is possible to not know if there were any faults at all since the scan tool doesnt always pick up the faults. But by comparing the data from the different parameters, it is possible to find a fault if the scan tool doesnt pick any up.
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