Mazda 5 I 1 owners manual page 98

text version of content this owner's manual page from owners manual to the vehicle Mazda 5, year of production 2005 - 2010:

Emission System 2.0 MZR-CD Engine Regeneration Control • The regeneration control determines the soot amount accumulated in the DPF and starts the regeneration process accordingly. The regeneration control is integrated in the PCM. S oot Amount Calculation • The PCM receives information about the soot amount accumulated in the filter from the F differential pressure sensor. In order to establish the DP soot emission of the engine, the PCM evaluates the customers driving method by monitoring the engine load, engine speed and vehicle speed. In addition, the PCM calculates the soot amount burnt off in the DPF using the signals from the HO2S and the exhaust gas temperature sensors. • Depending on the signal from the DPF differential pressure sensor, the calculated soot emission, the burnt-off soot amount and the distance travelled, the PCM decides whether and when a regeneration should be carried out. In this way, the filter does neither become blocked nor damaged by a violent regeneration following an over- accumulation of soot. As a result, it is possible to maintain the long-term integrity of the DPF while achieving minimum fuel consumption, minimum oil dilution and optimum engine performance. • If the soot accumulation rate in the DPF is 80 % or more, the DPF indicator light illuminates. In this case an automatic regeneration of the DPF must be penabled by -1 driving the vehicle at an engine speed of 2000 min or more and a vehicle speed of 40 km/h or more for approx. 10…15 min. As soon as the automatic regeneration process starts, the DPF indicator light turns off. Although the DPF indicator light turns off when the automatic regeneration is NOTE: started, the regeneration process is continued until the soot accumulation rate decreases to 60 % or less. NOTE: If the customer complains that the DPF indicator light illuminates frequently, he must be informed to change the driving method (such as driving the vehicle at middle or high engine speeds for a longer distance), so that regeneration of the DPF is enabled. • If the soot accumulation rate in the DPF reaches 100 % or more, the DPF indicator light flashes and DTC P2458 is stored in the PCM. In addition, the PCM reduces the fuel injection amount to lower the exhaust gas temperature, preventing the filter from overheating. Due to the reduced injection amount the soot emission of the engine and hence the soot amount accumulated in the filter is also reduced. In this case a manual regeneration of the DPF must be performed. 01-76 Service Training Mazda5

owners manual Mazda 5

owners manual Mazda 5 - year of production: 2005, 2006, 2007, 2008, 2009, 2010 - Mazda 5 I 1 owners manual EN