RyanD06

FIXED! Got her working.

If anyone ends up googling how to do it here's your answer.
The instrument cluster wiring diagram above shows the solid state logic for the fuel economy gauge. While it was very basic it appears it required vehicle speed and rpm amongst others. So with the car up on jacks, running in 2nd gear, 1100 rpm and 25kp/h, i was able to start inputing the Duty Cycle as i originally wanted.
ECU output at 250hz

18.5% Duty Cycle= 4 on the gauge
20% = 10
22% = 15
23% = 16
24% = 20
25% = 23
26% = 24
27% = 26
Ill be honest and say i didn't test at other rev ranges or speeds. So there may be some more tinkering required in that regard but so far so good.

Thanks everyone for your help!
 

FIXED! Got her working.

If anyone ends up googling how to do it here's your answer.
The instrument cluster wiring diagram above shows the solid state logic for the fuel economy gauge. While it was very basic it appears it required vehicle speed and rpm amongst others. So with the car up on jacks, running in 2nd gear, 1100 rpm and 25kp/h, i was able to start inputing the Duty Cycle as i originally wanted.
ECU output at 250hz

18.5% Duty Cycle= 4 on the gauge
20% = 10
22% = 15
23% = 16
24% = 20
25% = 23
26% = 24
27% = 26
Ill be honest and say i didn't test at other rev ranges or speeds. So there may be some more tinkering required in that regard but so far so good.

Thanks everyone for your help!
 

FIXED! Got her working.

If anyone ends up googling how to do it here's your answer.
The instrument cluster wiring diagram above shows the solid state logic for the fuel economy gauge. While it was very basic it appears it required vehicle speed and rpm amongst others. So with the car up on jacks, running in 2nd gear, 1100 rpm and 25kp/h, i was able to start inputing the Duty Cycle as i originally wanted.
ECU output at 250hz

18.5% Duty Cycle= 4 on the gauge
20% = 10
22% = 15
23% = 16
24% = 20
25% = 23
26% = 24
27% = 26
Ill be honest and say i didn't test at other rev ranges or speeds. So there may be some more tinkering required in that regard but so far so good.

Thanks everyone for your help!
 

The activation conditions need to be true for the output to activate.  You have got the switch logic set to "Cond 1 ONLY", so to make it work for testing you need to set up Sw Parameter 1 and Sw Cond 1 to something that will return a true result.  Something like Batt voltage > 1V will do it.  
Later since you will only want the gauge to show a value when the engine is running you would change those conditions to something like RPM > 500.