GF42.31-P-4002A | Location/task/function of BAS solenoid valve | 18.3.08 |
MODEL 129, 140 as of 1.12.96,
210 as of 1.2.97,
170, 202 as of 1.6.97,
168 up to 28.2.01,
163, 208, 209, 215, 220
MODEL 203 up to Model Year 08 /Modification Year 07
P42.31-0208-01
A7/7 BAS brake booster
y1 BAS solenoid valve
BAS solenoid valve, location | In the BAS brake booster. | ||
BAS solenoid valve, task | Admits air to the driver side chamber to carry out maximum brake assistance when BAS is activated. With ESP: In ESP-closed-loop operation a pilot pressure of approx. 5 bar is applied to the high-pressure pump. With DTR: In DTR closed-loop operation the braking of the vehicle is to be carried out if necessary. | ||
BAS solenoid valve, function | The solenoid of the BAS solenoid valve is activated by the BAS / ESP control unit and opens the poppet valve. The poppet valve admits atmospheric pressure to the rear of the power diaphragm of the brake booster and increases the brake pressure. |