darkmaghir

Can anyone help me reset my ECM or initiate the OBD2 diagnostics?

My '01 Altima just failed Maryland emissions testing because of, (according to the DMV), an OBD2 Code P0110 "Intake Air Temp Circuit Malfunction." My Haynes manual told me to check the sensor supply volts (o.k. ~4.9vdc) and the sensor resistance hot and cold (o.k. hot:low & cold:hi). After all that, the "Service Engine Soon" was still illuminated.

Haynes also told me about the ECM OBD2 diagnostics/reset procedures, I went to try these, but my ECM doesn't have the LED's nor the mode selector screwdriver switch by which Haynes says you initiate diagnostics/reset, (just a piece of clear tape covering the holes in the box where they should be).

I also tried disconnecting the negative battery terminal for a minute. After about 6-8 power-up/shut-down cycles, the "Service Engine Soon" light is still illuminated.

Does anyone have any advice for me; do I need an OBD2 scanner to do the reset?