DTC P2505 Mercedes-Benz

Description

Signal Missing, Speed Too Low Vehicle Speed gt; = 10 km h (6.2mph) (Drive-Off Detection) A failure is detected at all wheel speed sensors with a speed of lower than 2 km h if the speed of the fastest wheel (Vamx) is continuously above 10 km h longer than 180 s. - The monitoring function is always started if Vmax drops below 10 km h or if Vmin reaches 2 km h (1.2mph) . Vehicle Speed gt; = 15 km h (9.3mph) (Drive-Off Detection) A failure is detected at all wheel speed sensors with a speed of lower than 6 in case of the following condition. 1. Immediately if the speed of a non-driven wheel reaches 15km h. 2. Immediately if the speed of a fastest wheel(Vmax) reaches 15km h without detected overspinning. 3. The speed of a fastest wheel(Vmax) is continuously above 15km h with overspinning detected by deceleration phaes. 4. The speed of a fastest wheel(Vmax) is continuously above 15km h with detected overspinning. - The monitoring function is always started if Vmax drops below 7 km h (4.3mph) and Vref drops below 6 km h (3.7mph) , and it is stopped if Vref reaches 6 km h. The entry of the monitoring function may be delayed up to 5s if Vmin gt; 7 km h has been detected before. The monitoring function is stopped if the fastest wheel reaches 13 km h (8.1mph) and no gaspedalactivity is recognized. Vehicle Speed gt; = 15 km h (Extended Wheel Speed Comparison) A failure is detected at all wheel speed sensors satisfied with the following conditions for more than 120s. 1. Vmax gt; = 15km h (9.3mph) and Vmin lt; = (0.4 Vmax) 2. Vmax gt; = 40km h (24.9mph) and Vmin lt; = (0.6 Vmax) Control Cycle Too Long A failure is detected if the duration of permanent pressure reduction or pressure holding phases exceeds for 28s.