Although you emphasized it I missed the ASR part in you original post
Since your car is equipped with ASR you would need to check that the ASR module is signaling idle to the CFI (cont. fuel injection module) to do that you will need to measure the voltage between pins 6 and 41 in the CFI module connector with ignition ON you should expect battery voltage with the accel. pedal at rest and <1 V with the accel. depressed.
The CFI module is located behind the battery and is labeled as N3