P1025

P1025

Diagnosis information - Control unit DME (DFI)

Fuel high-pressure Adaptation

INFORMATION 1
- Faults in the fuel high-pressure injection system are often caused by defects in the preFaults Pre-delivery system (fuel low pressure).
- Therefore, if there are problems in the fuel high-pressure injection area, the Pre-delivery circuit must be checked first.

Diagnostic conditions
- Engine speed 450 ... 4,000 1/min
- Engine temperature -10 ... +100 °C (°F)
- Trip with different operating conditions

Possible fault causes
- Pre-delivery quantity or pressure in fuel low-pressure circuit too low
- Adaptation Fuel high-pressure necessary (See [Information] 2)
- Fuel high-pressure pump Faulty

INFORMATION 2
- The old values must be deleted prior to a new adaptation of the fuel high-pressure ranges.
- The fuel high-pressure adaptation values can be deleted with the [PIWIS-Tester II] as follows:
[DME] --> [Maintenance/repairs] --> [Delete adaptation values]