Re: how to do a self diagnosis test on a 93 eb?
Going for the diagnosis readout won't necessarily help you locate ignition/no spark problems - provided there's nothing wrong with the Smartlock and the car is "alive" and ready to run. Does the fuel pump whir for few seconds when you turn the ignition on? You have to go for tests and fixes aimed directly at the ignition system - and you're in the right area with the TFI module and coil. Frequently they both grenade at the same time.
If you have access to multimeters etc. you can probe the connector on the TFI module looking for voltages in the right place. You need a bit of circutry diagram for this. But generally you can bet that it it is one or both of the above items that's failed. Sod's law says you'll replace the wrong item first. If you can twist a friendly retailer's arm, borrow a coil and try that first. Ohter than that it's likely to be the TFI. The coil's a bugger to do, and remove the airbox for getting to the dissy to do the TFI.