Modern cars utilize an electric EGR valve but some vehicles also have an EGR cooler. So the EGR flow is controlled by PCM by opening (or) closing the EGR valve through a step motor. The EGR flow is monitored by the MAP sensor, MAF sensor & the fuel or air ratio sensor. Symptoms of ...
Everything about the NOx sensor: how it works, typical causes of failure, symptoms and fault diagnosis with the control unit. Reading time: 8 minutes Basic Knowledge NOx-Sensor - Mercedes Benz If a fault is diagnosed in the NOx sensor when troubleshooting an exhaust gas purification system, th...
By setting the cancel determination value K based on the intake pipe pressure P resulting when EGR off-control is executed in a state of an EGR valve being stuck in a fully-open position, each improperly-detected intake pipe pressure can be excluded with reliability.寺田 大樹...
It was suggested in an earlier post to replace the PCM with the valve. There doesn't seem to be a common failure mode between the two components to me. That PCM most likely does a lot more than control this valve and other symptoms should show up if the module has gone bad.I hope ...
EGR VALVE POSITION SENSORS FIGURE 27-4 An EGR valve position sensor on top of an EGR valve. EGR VALVE POSITION SENSORS FIGURE 27-5 An integrated EGR valve system showing the pintle-position sensor and vacuum diaphragm. EGR VALVE POSITION SENSORS ...
lamp has been extinguished, then carry out a road test. Many vehicles now require the EGR valve to be reset under adaptations. This simply allows the ECU to learn the stop position at the open and closed points. Failure to do this can cause the valve to break and fall int...
PROBLEM TO BE SOLVED: To determine the opening and fixing of an EGR valve in a hybrid vehicle equipped with a plurality of driving sources including an internal combustion engine comprising an EGR device.SOLUTION: An ECU (EGR valve fault detection device) 100 is configured to determine a state...