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The AAC actually stands for auxillary air control valve. It's basicly an Idle control valve. I've never seen one completely fail. They do get dirty though. Take the valve off and clean with carburetor cleaner where the plunger is. The only test I'm aware of is to hook the valve to a 12v source and s...

You can check that by looking at the o2 sensor function on bank 1 and 2. As long as they fluctuate between .1 and .9 volts very quickly, the o2 sensors are good. In turn that would correct you air fuel ratio to within specs as long as fuel pump and pressure regulator are good.

I don't believe so. What problem are you having?

I would bet that is a big part of your problem. Are you even getting 12V to the fuel pump?

This has nothing to do with your connection problem, but have you checked the fuel pump relay and the ignition switch to see if you're getting power to the pump?

It does in fact support the rear oxygen sensor. The parameter for it is oxygen sensor B1.

What year is your silvia?

Bring up NDS and click on the help tab. Then click activation and follow the prompts. Tom's email is nissandatascan@yahoo.com. You should be able to email him through that address.

1998 Nissan 200sx with the SR20DE engine.

It does not work for the sensor in the catalytic converter.