blog 2 on car flash codes

I did this exersice on the 4a-fe engine could b in a 1992 toyota corolla.This is used to find faults with jus ur check engine light and a jumper wire.I used a jumper wire with a fuse on it to make sure i dont blow anything.To do this you need the workshop manual to get fault codes if there is not a manual avalibale it is posible to find them on internet by puting in the engine name in google for example for this we would say 4a-fe fault codes.I used the jumper wire to jump from E1 to TE1.This may be differint for differint manufacturers.
I got my tutor to create a fault in the engine after i hooked up my jumper wire.I turned ignition on and the check egine light came on,it flashed twice then after a while flashed four times this makes the code 24.Checked the workshop manual I found that the code was for the IAT.Next code was 31 wich is for vacum.I did a visual inspection and found that the plugs were unpluged.The visual inspection was realy easy because after getting the fault codes i knew exactly were to look.I repaired the fault by pluging it back in and starting car to make sure all is well.after repairin fault I had to clear codes I did this by turning kill switch on and of in normal car just remove battery terminal for a few seconds.The faults i found would efect the engine in a big way by having a bad idle,car would be lean and could also have a constant flatspot.When finding a fault like this it is important to check the wires and the cause for the problem and also wat can be done to prevent this from happening again.
This is a realy quick and effective way of checking faults in a car and can also be done on side of the road if neccesary.