WS5 Scan Tool Diagnositics

Scan Tool Diagnostics

Warning: Be careful working around engines and exercise caution to avoid injury.
1. Scan Tool Data
1.1 Find a vehicle which is appropriate for the scan tool.
1.2 Connect the scanner, power it on, follow the instructions andinput the correct vehicle information it asks for so you can view the data.
1.3 Find the data for the information listed on the next page.Turn engine on to idle. Fill in the letter used to label the information and the value of that data.Note: not all vehicles will support all information, just find as much as you can. If the engine won't run, input the information with the key on, engine off.

Type of information (PID = Parameter Identification)	Letters to describe it E.g. TPS	Value of data	Units for data E.g. volts
Engine Load (how much air comes in)	AS	1.30	V
Engine RPM	E.S	762	rpm
Throttle angle	TPS	0.48	V
Engine coolant temperature	ECT	69	C'
Intake air temperature	IAT	49	C'
Fuel Injection opening pulse	injection time	2.7	ms
Transmission select position
Vehicle Speed			KM
Oxygen sensor(s)	O2	0.27	V
Fuel Trim
Idle control	IACV	69	%
Power steering condition
Air conditioning condition	AC signal	off
Exhaust Gas Recirculation (EGR)
Fuel Evap or Purge condition
Malfunction Indicator Light (MIL)
Barometric Pressure
Battaery		14.1	V

2 Trouble Codes or Fault Codes
2.1 Find where the Codes are listed
2.2 Record any codes, and what system and condition they describe in the chart below (Example: might be code number 21, for Throttle Position Sensor, signal voltage too low) If
there are no codes listed, put “none”.
The car's system as normal and there is no faults and the car also run good. If the car has any problem it will come up with trouble code . 

3 Lecturer put in Fault
3.1 Find your lecturer and have him create a fault under the hood (don’t look)

Record New Codes
4.1 Look up the codes now in the scan tool
4.2 Record the codes in the chart below. Also record what system is affected, and what condition is described.
when I checked through the scan tool it show me 2 problems in scan tool data but when I check for the codes it's didn' come up,we checked the data we got from before and then compared it and we got the TPS senor and Air flow sensor, that voltage was very high for TPS and the engine was running rough.

Find What Data Has Changed
5.1 Look through the scan tool data to see what PIDs (Parameter Identification of system voltages) have changed.
Which readings don’t make sense or don’t read what you would expect. Concentrate on the PIDs related to the codes.
5.2 Record the PIDs that have changed below:
I checked the data sheet and notice that the throttle position sensor voltage was very high that was 5.10 V when its normal that should be around 0.48V. That's what I got when it was normal and also i notice that the engine was not idling well so we notice that air flow sensor wasn't connected so the engine was running rough.


6 Visual Inspection to find fault
6.1 Do a visual inspection under the hood to find where the problem is. Use information from the code to know where to look for the problem and what type of problem to look for.
Describe problem you found:

I've already knew what I have to looking for when I opened up the hood,I found that the Throttle position sensor and the Air flow sensor were disconnected so engine wasn't idling well and also engine was running rough.I just had to plug back in the sensors i turned off the engine but the ignition on then I use the scan tool to clear out the faults and check it if it was cleared it was and the system was back to normal.I also checked the data sheet, the voltage was back to normal. Other ways for fix the faults codes or other light on your dash board you can remove the battery terminals for 30 seconds also you can remove the main engine fuse to get ride of the fault codes.

The importance of live data fault finding is that its very easy to know what's the problem on your car.

Scan tool is very handy to use now it makes the work easy and very useful for workshop to have one be makes job easier faster and can be done very quickly.