Diagnosis Information - PDK (Dual-Clutch Transmission)

P1839

Diagnosis information - PDK

Power supply for pressure regulators 2 (clutch 2) and 3 (lubrication pressure/cooling pressure), short circuit to B+

Diagnostic conditions
The control unit initially tests internal function sequences when the ignition is switched on (terminal 15). If they are OK, all diagnosable outputs are then tested and any faults are stored.

- Ignition on
- The following fault is not detected: P1752

Possible fault causes
- Line between pressure regulator 2 and PDK control unit faulty
- Line between pressure regulator 3 and PDK control unit faulty
- Pressure regulator 2 or 3 faulty
- PDK control unit faulty

Fault setting conditions
- Actual measured voltage HS2 > 4 V

Fault effects
- Power supply switch-off, pressure regulators 2 and 3
- Pressure regulators 2 and 3 switch-off
- No gear pre-selection
- Only gears 1, 3, 5 and 7 are possible
- White transmission limp-home indication in instrument cluster