Power Supply For Pressure Regulator 1 (Clutch 1), Short Circuit To Ground

P1838

Diagnosis information - PDK

Power supply for pressure regulator 1 (clutch 1), short circuit to ground

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 1 and PDK control unit faulty
- Pressure regulator 1 faulty
- PDK control unit faulty

Fault setting conditions
- Actual measured voltage HS1 < 0.05 V

Fault effects
- Power supply switch-off, pressure regulator clutch 1
- Pressure regulator clutch 1, switch-off
- No gear preselection
- No R gear
- Only gears 2, 4 and 6 are possible
- Transmission limp-home indication in instrument cluster control unit