Crown Victoria - OBD CAN bus protocol

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Ragnerd

Member - Posts: 3

Joined: August 05, 2005

Posted: August 05, 2005 at 10:01 AM / IP Logged

Hello.

I was just wondering if anyone has any information about which protocol to use when communicating with the on-board diagnostics for a 2005 Crown Victoria.

Thanks!

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Satkunas

Copper - Posts: 97

Joined: April 04, 2005

Location: Canada

Posted: August 05, 2005 at 10:25 AM / IP Logged

It's probably J1850 PWM (44kHz).

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Ragnerd

Member - Posts: 3

Joined: August 05, 2005

Posted: August 05, 2005 at 2:25 PM / IP Logged

We have already tried using the J1850 protocol, and it works fine with the 2004 and earlier models. Do you have any other suggestions???

Thanks!

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Satkunas

Copper - Posts: 97

Joined: April 04, 2005

Location: Canada

Posted: August 05, 2005 at 3:37 PM / IP Logged

It's probably been changed to CAN. Google turrned up a mention on this vehicle <http://www.roadsafety.com/teen_techspecs.php#> that it's no longer OBD-II. If you can get me a photo of the data plug I can tell you for certain which protocol it uses.

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Ragnerd

Member - Posts: 3

Joined: August 05, 2005

Posted: August 11, 2005 at 11:20 AM / IP Logged

Correct. The hardware interface was switched to CAN. Do you have any ideas on the high-level protocol? I'm hoping that the 2005 models still use J1979.

Thanks!

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Crown Victoria - OBD CAN bus protocol

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