WS2

After reading at the workshop manual, we turned the ignition on without starting the engine.Then we used a jumper wire to connect TE1 and E1 of TDCL to get the car into diagnostic mode ( or to use ECU), so we can find the faults from ECU.Then we recorded the warning light how time it' flashing. First, it was flashing three times and one time with alittle time interval between them, which means 31 for vacuum sensor circuit. Second one was 41 for throttle position senosr circuit and the last one was 24 for intake air temperature circuit.

Code number	System affected	Condition described
31	vacuum sensor	disconnected
41	Throttle position sensor	disconnected
24	Intake air temperature	disconnected

HTML Tables

After we did a visual inspection to find fault, i found the vacuum sensor was not connected properly and the wire were broken, Throttle position sensor was not connected properly and Intake air temperature sensor was unplug.

-We repair  all these faults by making sure they are connected or plugged properly.

Clear codes

To clear the codes, we disconnected to the battery and removed the wire in the diagnostic plug.

Recheck the codes and record the codes in the system.

After we reconnected the battery and switched the ignition on,then we found the  flash light on the dash board is working normal.

How could the faults found affect the engine performances?

The ECU will get wrong signals form sensors process badly which could effect engine performance.From vacuum sensor. it will cause the engine run poorly and to make the engine emission to rise because it won't be running at the optimum condition.

Discuss what other tests you should be doing once you have found the fault codes:

We can check the supply voltage, check the ground by voltage dropping the earth wire with a good ground and we can also do oscillation test on the sensor whether it's working properly or not.