OBD2 S52 and E30 OBC Security / Immobilizer

[exhaust]

When I was first getting the S52 started I ran into a no fuel / no start issue. I ended up unplugging the OBC and it started right up. The OBC code/immobilizer feature was active and preventing it from turning over.

A new code would make sense since the battery was out for so long but I'm not sure. I can't find any definitive information online. Car is an 87 convertible with the 13 button OBC.

Does the OBC just need a new code or does this need to be completely bypassed?

[IRON-E]

Is your car an 88?

[exhaust]

No it's an 87

[exhaust]

Bump. Car is running but still no OBC

[DesertBMW]

just bypass two wires at the black relay box. Pin 3 and pin 4, green and green red wire. join them together, this will eliminate the problem

[exhaust]

just bypass two wires at the black relay box. Pin 3 and pin 4, green and green red wire. join them together, this will eliminate the problem

Thanks! This is exactly what I was looking for