P1570

P1570

Diagnosis information - Control unit DME (DFI)

Internal power supply (R/C)

Diagnostic conditions
- Vehicle voltage > 11 V
- Engine compartment and engine cold
- Engine running, then:
- Switch off ignition
- Switch on ignition after approx. 1 minute

Possible fault causes
- Power supply of the DME (DFI) control unit was interrupted (See [Information])
- R/C component in the DME (DFI) control unit faulty

INFORMATION
This fault can be entered if the power supply of the DME (DFI) control unit is interrupted within the first 45 seconds after ignition off (discharge time of the R/C) and is then restored again immediately afterwards and the ignition is switched on.
- After the ignition is switched off (terminal 15), the DME control unit switches to control unit after-run mode.
- The run-on period depends on many boundary conditions (e.g. engine temperature for fan operation).
The run-on duration can be 1 minute when the engine is cold and up to 45 minutes when the engine is hot.
- The run-on time is 1 ... 60 minutes.