Power Supply For Pressure Regulators 2 (Clutch 2) And 3 (Lubrication Pressure/Cooling Pressure), Open Circuit

P1831

Diagnosis information - PDK

Power supply for pressure regulators 2 (clutch 2) and 3 (lubrication pressure/cooling pressure), open circuit

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
- Internal current measurement for pressure regulators 2 and 3: current consumption = 0 mA

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