Model: Lumina Van
Engine: 3.8 Liter
When I try to start the van in the morning, I get a check engine light and
it sputters for a few seconds and then quits running. Sometimes it takes up
to four or five times and then it starts with no check engine light.
I want to see what the codes are by shorting terminal A and B together on
the Data Link Connector. I have a Chilton book for 1990 to 1999. It has a
diagram for the 12 pin DLC showing where A and B are supposed to be, but
when I look at my Van there is not a wire going to where B is supposed to
be. There are only three wires going to the DLC on my van. I have two wires
on the last two rows of the DLC and one wire two positions from the bottom
right. This connector is in clear view under the dash on the drivers side of
the steering column. Does anyone know what two wires I should short
together? Can anyone help me?
This be one of them. This vehicle uses ALDL8192 communications. Easiest
solution is to take it somewhere and have the codes read. I suggest a garage
with a mechanic and not your local part store.
Nearly all 1994/95 GM cars are set up this way. They use the old
OBD1 ALDL connector WITHOUT the "B" lead, so no counting flashes of
the "Check Engine" light to acquire codes. Even more weird is that a
number of these vehicles, including 1994/95 VIN Code "L" 3800 V6s,
have an ECM that outputs OBDII type fault codes - so an ODBI code
reader is electrically OK but cannot make any sense of the data
Best thing is to take the vehicle to a repair shop with the proper
equipment to read the ECM. All the commercial readers can, with the
proper cartridge/software, cope with these what I call "OBD1.5"
systems, where as damn few consumer-grade readers can.
P.S. I do feel your pain on this: I have a 1994 Regal with the same
engine and ECM setup.
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