Hi
Does anyone know what is it mean error code number 124 (with FORD DIGITAL CODE READER, like -Star- tester)?
by Ford technical book: Throttle Position sensor voltage above
the normal.........but my TPS, wiring, Ecu(all system component), is Ok.

 

I've got error code 124 down as "TP voltage was higher than expected”

Looking at the source code this equates to 63360 A to D counts, which divided by 16384 = 3.8671875 volts. If this value is this more than the measured voltage when the throttle is fully open you shouldn’t get error 124.

Does this help?


Oops screw up...

63360 A to D counts should have been divided by 12800, which gives 4.95 volts.

 

Thanks
Could I get some more details?

 

Sure, I'll help if I can, what are you after?

 

If the TPS fully open the volts above 4v (with multimeter)
sorry what is it mean exactly "source code this equates to 63360 A to D counts..."?

 

I’m probably not too good at explaining this but here goes…

By source code I’m referring to the ecu calibration data and its program.

The eec-iv processor has an inbuilt analogue to digital converter that it uses to read sensor voltages and this raw data the ecu acquires is referred to as A to D counts, i.e. the voltage of the throttle sensor is converted to a value in A _D counts.

The ecu then constantly checks this value and against a maximum and minimum limit and if the value is outside of these limits then and error is recorded (only if the value stays outside of the limits for a set period of time). In the COSY ecu the values are:

;
TPS_AD_COUNT_MAX:
F780 in hexadecimal which equals 63360 in decimal
;
TPS_AD_COUNT_MIN:
0C80 in hexadecimal which equals 3200 in decimal
;

If you divide the value by a scaling number (which varies depending on the data being looked) you get the max and min voltage limits the ecu uses to raise an error.

So for the above values you divide by 12800 to get 4.95 volts and 0.25 volts respectively.

Ignoring my earlier screw up, if the measured voltage when the throttle is fully open is less than 4.95 volts you shouldn’t get error 124

Hope this helps.

 

Thanks