2010 Porsche Panamera Turbo (970) V8-4.8L Turbo A L L Diagnostic Trouble Codes ( DTC ): P Code Charts Page 466
- DME fault entry P0685 with FreezeFrame actual value >A010-DME SUPPLY VOLTAGE< = 0 V
- NO DME fault entry P0686 because these diagnostic conditions (> 8.0 V at A34) were not met.
- Start voltage > 5 V ... < 6 V + DME main relay is working:
- Starter turns
- Engine does not start
- DME fault entry P0685 with FreezeFrame actual value [A010-DME SUPPLY VOLTAGE] > 5 V ... < 6 V
- NO DME fault entry P0686 because these diagnostic conditions (> 8.0 V at A34) were not met.
- Start voltage > 6 V ... < 8 V + DME main relay does NOT function:
- Starter turns
- Engine does not start
- DME fault entry P0685 with FreezeFrame actual value >A010-DME SUPPLY VOLTAGE< = 0 V
- NO DME fault entry P0686 because these diagnostic conditions (> 8.0 V at A34) were not met.
- Start voltage > 6 V + DME main relay is working:
- Starter turns
- Engine starts
- NO DME fault entries
- Start voltage > 8 V + DME main relay does NOT function:
- Starter turns
- Engine does not start
- DME fault entry P0685 with FreezeFrame actual value >A010-DME SUPPLY VOLTAGE< = 0 V
- DME fault entry P0686 with FreezeFrame actual value >A010-DME SUPPLY VOLTAGE< = 0 V
II. Behavior and displays in the E2 with WS5890 or higher:
- Start voltage < 5 V:
- Starter might turn
- Engine does not start
- NO DME fault entries because the DME (DFI) control unit is not viable.
- Start voltage > 5 V ... < 8 V + DME main relay does NOT function:
- Starter turns
- Engine does not start
- DME fault entry P0685 with FreezeFrame actual value >A010-DME SUPPLY VOLTAGE< = 0 V
- NO DME fault entry P0686 because these diagnostic conditions (> 8.0 V at A34) were not met.
- Start voltage > 5 V ... < 8 V + DME main relay is working:
- Starter turns
- Engine starts
- NO DME fault entries
- Start voltage > 8 V + DME main relay does NOT function:
- Starter turns
- Engine does not start
- DME fault entry P0685 with FreezeFrame actual value >A010-DME SUPPLY VOLTAGE< = 0 V
- DME fault entry P0686 with FreezeFrame actual value > >A010-DME SUPPLY VOLTAGE< = 0 V
- Start voltage > 8 V + DME main relay is working:
- Starter turns
- Engine starts
- NO DME fault entries
P0686
P0686
Diagnosis information - Control unit DME (DFI)
Main relay off
Diagnostic conditions
- Vehicle voltage > 8.0 V
- Ignition off
- Control unit run-on completed (See [Information])
- then Ignition on
Possible fault causes
- Main relay Faulty (Contact stuck)
- Short circuit to B+ Lead between Main relay and Control unit DME (DFI) (Power supply Control unit DME (DFI))
- Short circuit to ground Lead between Control unit DME (DFI) and Main relay (Activation Main relay)