WS2 Flash Codes

Flash Codes

We used for this expeirment Toyota 4A - FE engine

Using the workshop manual follow the procedure to extract the codes, explain briefly what is the procedure:

 



 We found the diagnostic plug on the engine and by using the workshop manual and with tutor advise, we turned the ignition on, without turning the engine on. With help of connector, having cinbuilt fuse, we connected TE1 and E1 of TDCL. Then we checked the warning light on the instrumental panel. It was indicating two fault codes after one another with a little time interval between them. The lowest code appeared first which was 22 for water temperature. The next one was 31 for MAP sensor and then 41 for TPS and 24 for IAT Sensor (according to workshop manual). After completing the check, we disconneted TE1 and E1and turned the ignition off

Code number	System affected	Condition described
31	MAP Sensor	disconnected
22	Water Temperature	disconnected
41	TPS (Throttle Position sensor)	disconnected
24	IAT (Intake Air Temperature sensor)	disconnected

 

Visual inspection to find fault:

Describe the problems you found;

We took the three sensor out of there connections and according to the manual instructions we connected the two connections in the diagnostic plug and then switched on the ignition. we found that the flash on dash board blinking in out of order. Then we calculated the number of blinks on dash board and saw there is a pause between two continuous blinks and after counting the number of blinks in order wise, we matched those with the manual faults code and found the problems.

 

 

Repair fault:

Plug back in the connector, or repair problem found

Describe what you did:

After turning the ignition off,  putting the every sensors back in their places and leveing the coniction in diagnostic plug as it is we switched on the ignition again . We found there are same codes coming up again even after repairing the problems.

 

Clear Codes:

Discribe what you did to clear the codes

 

I took the connection wire out from the dignostic plug . Then i disconnectecd the battery and reconnected it again to clear the codes.

Recheck the codes and record codes in the system.

After reconnecting the battery and switching the ignition on, we found that the flash light on dash board is working normal.

7. How could the faults found affect the engine performances?

The ECU will receive wrong signals from sensors and process wrongly which could effect engine performance.

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

we will do the oscillation test on the sensor whether it is working propeerly by bac probing.