1 | Fault code | for right cylinder bank for left cylinder bank |
2 | Fault memory and actuation of CHECK ENGINE (MIL) | Fault memory after two consecutive journeys with fault. No actuation of CHECK ENGINE (MIL). |
3 | Frequency of testing | Once per driving cycle |
4 | Checked signal or status | Intake manifold pressure sensor signal |
5 | Fault Duration of test | Pressure changes by less than approx. 20 mbar < 10 s |
6 | Test conditions | – Inertia fuel shutoff active – Engine speed approx. 1000-1500 rpm – Engine at operating temperature – No fault in voltage supply of adjustable camshaft timing solenoid |
7 | Test sequence | With the start of the functional chain the instantaneous intake manifold pressure is determined after approx. 1 second. After this the adjustable camshaft timing solenoids are actuated for approx. 2 seconds and the intake manifold pressure is evaluated for a further approx. 6 seconds. A fault is recognized if the intake manifold pressure has not changed by at least approx. 20 mbar when the camshaft is adjusted from "advance" to "retard" or from "retard" to "advance". |
8 | | If a condition changes during the test, the test is terminated and started again later. |