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I'm sure the guys over at PLMS developments will get a kick out of seeing this thread and being told they have no idea what they are talking about.
I guess you aren't getting how this works. The ECU runs mode 1 diagnostic automatically. I.E. when the ignition is turned off, it returns to mode 1. During mode one diagnostic operation with the engine ON, if there is a fault the ECU will illuminate the check engine light and the red LED and place the car into FAIL SAFE MODE as indicated by the FSM excerpt. This is NOT the same as the mode 1 diagnostic with the engine OFF which is used to check the function of the indicator and LED!
A "f'ed up install of a daughter board" causes a mode 1 malfunction, which causes the ECU to be "stuck' in mode 1 because mode 1 will not clear and allow you to read mode 2 trouble codes unless the fault is corrected. In this case, the fault will remain because the ECU cannot communicate with the daughter board so the LED stays on, and it's stuck and you cannot use CONSULT or other diagnostic modes!
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