Charge air cooler circulation pump, ME-SFI fault code description - AD07.61-P-4000-98M
| 1 | Fault code | P2002 Charge air cooler circulation pump (M44), actuation (-) |
| (Fault code according to OBD) | P20E1 Charge air temperature too high (-) | |
| 2 | Fault storage | After expiry of test duration and fault |
| Actuation of engine diagnosis indicator lamp (EURO4) or CHECK ENGINE (MIL) |
no activation | |
| 3 | Checking frequency | Continuous |
| 4 | Checked signal or status |
|
| 5 | Fault setting conditions | |
| Short circuit to ground | Voltage lower than 4 volts | |
| Short circuit to positive | Current higher than 4.2 A | |
| Open circuit in wiring | No voltage on the charge air cooler circulation pump relay, approx. 4 to 8 V on under no load output of the ME control unit | |
| 6 | Check prerequisites | Battery voltage between 8 and 17 V |
| 7 | Actuation is checked for a line interruption and short-circuit (to ground or battery voltage). A short circuit to ground and a cable breakage 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. This means that the charge air temperature can go above 70°C (loss of performance). Model 240: diagnosis locked out because the charge air cooler circulation pump relay (N10/9kO) in the passenger-side SAM control unit with fuse and relay module (N10/9) is actuated by its own output stage which is not checked by the engine control unit. |