ACDelco SPS GM programming

all i can tell you is never buy any bench cable a home made bench cable is the best option which is very easy to make a couple of years i encounter an offboard programming error message while trying to program some GM ECM on the bench but after alot headache i made myself a GM bench cable that i use and it never lets me down even if its an ecm for a 2022 GM car am able to bench program it

For programming with SPS on the bench, is possible to do it easy on the PCM modules, as they can be connected standalone.  You only need to fabricate a PCM wiring harness for any type/model of computer you use, which include the power, grounds and communication wires & hook them to a female OBDII connector. Then you can use any J2534 passthrough adapter, Tech2 or MDI as the interface between the laptop and the OBDII connector.

The PCM's can be easily programmed because they can work alone.  For other modules as BCM, Instrument Cluster, Airbag, Steering, Door modules, Seats, etc... is more complicated because they need to be connected to the whole network to do it.  You can access them standalone for diagnostics but not for reprogramming. So the only way is to emulate a complete network of the car with the PCM and all other modules all wired in the bench, then probably SPS will let you program them, but you need to do it for every make & model vehicle. So is quite a tedious job if you only have to do it for just 1 module.

As older is the vehicle, from 1994 to 2010 (aprox) is easy to do it, but from 2010 onwards everything is more linked and if you don't have the complete network of the vehicle up and running maybe it will not allow you to do it. You just need to try it.

For programming with SPS on the bench, is possible to do it easy on the PCM modules, as they can be connected standalone.  You only need to fabricate a PCM wiring harness for any type/model of computer you use, which include the power, grounds and communication wires & hook them to a female OBDII connector. Then you can use any J2534 passthrough adapter, Tech2 or MDI as the interface between the laptop and the OBDII connector.

The PCM's can be easily programmed because they can work alone.  For other modules as BCM, Instrument Cluster, Airbag, Steering, Door modules, Seats, etc... is more complicated because they need to be connected to the whole network to do it.  You can access them standalone for diagnostics but not for reprogramming. So the only way is to emulate a complete network of the car with the PCM and all other modules all wired in the bench, then probably SPS will let you program them, but you need to do it for every make & model vehicle. So is quite a tedious job if you only have to do it for just 1 module.

As older is the vehicle, from 1994 to 2010 (aprox) is easy to do it, but from 2010 onwards everything is more linked and if you don't have the complete network of the vehicle up and running maybe it will not allow you to do it. You just need to try it.

I am having a problem bench programming with SPS, an E41 ECM, it will not program because it sees 255km/h and must be at 0. Maybe because there is not an input signal and default, I am assuming. How do I circumvent that?