OK. Third time asking about this issue. I have 2007 Dodge Magnum SXT
RWD 3.5L HO. Was receiving P1004 and P1005. Removed and cleaned Intake Manifold Tuning Valve (MTV) and Short Runner Valve (SRV). Ended up replacing both MTV and SRV with new Mopar parts.
Now vehicle is giving P2017, P2077, P2078, P1004, P1005. Performed the following and all passed. (K136) MTV CONTROL CIRCUIT SHORTED TO VOLTAGE (K136) MTV CONTROL CIRCUIT SHORTED TO GROUND (K136) MTV CONTROL CIRCUIT OPEN OR HIGH RESISTANCE (Z816) GROUND CIRCUIT
OPEN OR HIGH RESISTANCE I do NOT have access to Factory Chrylser DRB III or Starscan tools. I cannot find any detailed information on how the PCM controls the MTV and the SRV. From what I have read, the MTV/SRV operate per preprogrammed data (open loop) until
operating temperature is reached, then they operate based on data input from various sensors, including the O2 sensors (closed loop). I cleared all codes and began driving the vehicle from cold condition. Once vehicle reached operating temp. the MIL light
came on. It seems that something in the closed loop is causing the problems, i.e,, O2 sensor, etc. Does anyone have any detailed info on what and how exactly the PCM controls the MTV/SRV during both open and closed loops? controls MTV and SRV