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Thread: PWM on HONDA

  1. 12-16-2008, 01:59 PM #1
    DGutierrez
    DGutierrez is offline
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    Post PWM on HONDA

    Hi, I need some help, I have to do a OBDII reader as a project in collegue and I found that the vehicule I could use for test (HONDA CRV) has the SaE-J1850 protocol PWM.
    So my teacher ask me if the OBDII conecctor really has a PWM? I mean, is it really a PWM or the frame has a static Width for each byte?
    I don't know how to measure (if I can), can i see it with a osciloscope?
    Can anyone please help me?
    Thanks
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  2. 12-17-2008, 06:45 AM #2
    michbound
    michbound is offline
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    It would be helpful if you have access to the SAE J1850 spec in your school library, the Byte frame on J1850 PWM is a fixed width, the PWM part is due to the the widths of the pulse conveying the info...

    I would have thought that the Honda would be ISO rather than PWM though, are you sure its PWM?

    Paul
    www.obdpros.com
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