OBD2 not working
Thread Starter
Staging Lane
Joined: Aug 2008
Posts: 76
Likes: 0
OBD2 not working RED/BLUE pcm lq4 into a Grand Wagoneer.
Blue pin 58 to OBD2 pin 2 showing ~0.4v fluctuating
OBD2 4 & 5 grounded
OBD2 16 is hot at all times (run through silverado fusebox)
Engine starts up and appears to run fine. However, when I hook my ELM 327 up it says failure to detect protocol. I'm confused why it doesn't work.
Any ideas?
-Nick
Blue pin 58 to OBD2 pin 2 showing ~0.4v fluctuating
OBD2 4 & 5 grounded
OBD2 16 is hot at all times (run through silverado fusebox)
Engine starts up and appears to run fine. However, when I hook my ELM 327 up it says failure to detect protocol. I'm confused why it doesn't work.
Any ideas?
-Nick
Nick
Is that ELM 327 a Bluetooth device ?... I heard that some of the eBay ones may or may not work all of the time.
Might try a cabled Scanner to verify if you are getting Serial data or not.
BC
Is that ELM 327 a Bluetooth device ?... I heard that some of the eBay ones may or may not work all of the time.
Might try a cabled Scanner to verify if you are getting Serial data or not.
BC
Thread Starter
Staging Lane
Joined: Aug 2008
Posts: 76
Likes: 0
I've also wired up an 02 silverado dash and that does not seem to function either. The idle is high (i'm guessing around 2k).
The pcm was tuned by wait4meperformance. I told them to remove VATS. Could that have caused the serial data issues? I saw in another thread that the serial data voltage should varry between 0-7v. I'm getting 0.05-0.4ish.
The pcm was tuned by wait4meperformance. I told them to remove VATS. Could that have caused the serial data issues? I saw in another thread that the serial data voltage should varry between 0-7v. I'm getting 0.05-0.4ish.
Here is a copy/paste from from another page I found. It looks like 0-7 volts is correct,
"The class 2 data was
at a resting level of 0 volts and was pulled high to around 7 volts to talk."
"The class 2 data was
at a resting level of 0 volts and was pulled high to around 7 volts to talk."
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Thread Starter
Staging Lane
Joined: Aug 2008
Posts: 76
Likes: 0
Went to AutoZone and got the cheapest scanner and it was able to read the computer. No error codes.
I guess my scanner doesn't like the pcm.
Thinking of ordering a PLX Kiwi bluetooth for the droid. My dad has one and likes it. However, I would like hptuners so I can play with things.
I guess my scanner doesn't like the pcm.
Thinking of ordering a PLX Kiwi bluetooth for the droid. My dad has one and likes it. However, I would like hptuners so I can play with things.
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I had picked up one of them ebay elm327 last month, using it with my Xoom and installed Torque... works pretty good. Still learning about is other Advanced functions. Fun to play with and monitoring while I driving down the road.
BC
BC
