Activated charcoal canister shut-off valve ME-SFI - fault code description - AD07.61-P-4000-20L
| Activated charcoal filter shutoff valve | |||
| 1 | Fault code | P2025 Activated charcoal filter shutoff valve, voltage supply (P0446) | |
| ( |
P2012 Activated charcoal filter shutoff valve, plausibility (P0446) | ||
| 2 | Fault storage | after expiry of test duration and fault | |
| Actuation | following two successive driving cycles with faults | ||
| CHECK ENGINE (MIL) malfunction indicator lamp |
|||
| 3 | Checking frequency | Continuous | |
| 4 | Checked signal or status | Voltage and current for activated charcoal canister shutoff valve | |
| 5 | Fault setting conditions | Voltage lower than 4 volts | |
| Limit values for voltage supply | Current higher than 4.2 amps | ||
| Short circuit to ground | No voltage on activated charcoal filter shutoff valve | ||
| Short circuit to +12 V | Approx. 4 to 8 V on under no load output of the ME control unit | ||
| Open circuit in wiring | approx. 1 seconds | ||
| Checking duration | If an excessively high vacuum is measured in the fuel tank by the fuel tank pressure sensor | ||
| Plausibility | before beginning the leak test on the purge system then a blocked activated charcoal filter shutoff valve will be suspected and fault P2012 will be issued. | ||
| 6 | Actuation of the activated charcoal canister shutoff valve is checked concerning a cable open-circuit and short-circuit (to ground or battery voltage). A short circuit to ground and a line discontinuity will be recognized when the output stages are locked, while a short circuit to the battery voltage is recognized when the output stages are conducting. The output stage is immediately no longer activated when a fault arises. |
||