Not really Pro-Touring, but car related, Bonneville help..

[Samckitt]

I have a 94 bonneville that the SES light is on & I can't figure out how to get the code. I was told to put a jumper between 2 terminal in the ALDL connector, however it has what looks like the OBD2 ALDL connector. So the terminals in the connector are different. I thought some 95 models had the OBD1 system with an OBD2 style connector. But this car is a 94.

I'm confused....

Can I get the error code without taking to a dealer? Autozone says they can only pull the code if it is a 95 or newer.

[Goatman]

AutoZone does it for free...............

[shep]

Our local O'Reilly loans out a scanner that can do pre OBDII cars. You might try another chain or even another AutoZone.

[Samckitt]

Ok what part of "Autozone says they can only pull the code if it is a 95 or newer." did you miss? I have tried them & they say they won't/can't do it. Only other chain around here told me they can't do it either.

[Norm Peterson]

The '94 Bonneville (3.8L SFI, L27, VIN L) uses the OBD II connector but is not OBD II compliant (it uses the OBD I application software).

I've got an Actron CP9145 scanner, and I can follow through the menus to get to VIN "L" for a 1994 Bonneville. I presume that means that it can read the codes, else why would anyone bother to clutter up the menu structure with stuff that doesn't work. But I haven't yet tried to use it for what Actron calls "historic" diagnostics (pre-OBD II), so I'm not completely sure.

Some ALDL's can be jumped so you can use the "Check Engine" light to display the codes. These are supposed to have a wire coming out of pin "B", which you short to pin "A". But if there is no pin "B" wire, it is already factory-shorted to pin "A", uses somewhat different logic, and you wouldn't be able to extract the codes through the "Check Engine" light.

Did the Autozone tech/service writer know which connector you've got? Or were you just told 'no' without anybody checking?

Norm

[Samckitt]

I went back to Autozone Friday at lunch & they tried to read it, all they got was an error message. And said there was some sort of problem with the link circuit. But then later at work I borrowed a tech 2 scan tool & found out there is a problem with the EGR system. I haven't looked into it any more than that yet. So I don't know what I am getting into.

Sorry I forgot to update this.
Thanks

[Norm Peterson]

If it's at all similar to what's on one of my cars (non-GM), there are a couple of solenoids that control the vacuum applied to the EGR diaphragm. And there's a position sensor on the valve (it's a variable resistor that tells the ECU how far open the valve actually is). So it could be an electrical problem with any of those things or the wiring to them, the valve itself could be stuck, or there could be a vacuum leak in that system.

Norm