code 31...check resistance
- Thread starter 2543arvin
- Start date
Well, in one technician training manual, it does list a Hz spec. I assume you should do this while in neutral, with out a load.
30 Hz at 700 RPM
90 Hz at 2500 RPM
170 Hz at 4000 RPM
The frequency should get faster with engine speed. I don't know where the voltage is supposed to be. But in the EFI section of the repair manual, I know it shows voltages and the pin connectors. So check there.
30 Hz at 700 RPM
90 Hz at 2500 RPM
170 Hz at 4000 RPM
The frequency should get faster with engine speed. I don't know where the voltage is supposed to be. But in the EFI section of the repair manual, I know it shows voltages and the pin connectors. So check there.
After precisely tuning it my Lex runs around 20 hz at 48% duty cycle @ 650 rpm. There's no way anything near that will be 4.8 vdc. He needs to either use a scope or just go ahead and replace the AFM.
I can tell you from running the engine off a frequency generator in place of the AFM (while monitoring Vf and the raw O2 signal) just how narrow the control window is, especially at idle. It's a very delicate balance. No wonder many people have troubles getting the engine to run right after messing with the system.
I can tell you from running the engine off a frequency generator in place of the AFM (while monitoring Vf and the raw O2 signal) just how narrow the control window is, especially at idle. It's a very delicate balance. No wonder many people have troubles getting the engine to run right after messing with the system.
jetjock said:
Since I dont have anything to measure frequency, I think Im gonna go ahead and replace the afm....:3d_frown:
Thanks a lot for your help JJ and Nick
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