2010 Porsche Panamera Turbo (970) V8-4.8L Turbo A L L Diagnostic Trouble Codes ( DTC ): P Code Charts Page 27
- The following fault is not detected: P1838
Possible fault causes
- Line between pressure regulator 1 and PDK control unit faulty
- Pressure regulator 1 faulty
- PDK control unit faulty
Fault setting conditions
- Internal current measurement, pressure regulator 1: current consumption = 0 mA
- Pressure regulator 1, measured voltage = 0 V
Fault effects
- Pressure control switch-off, clutch 1
- Engaged gear is held until vehicle stops.
- Moving off possible only in 2nd gear
- Transmission limp-home indication in instrument cluster control unit
Pressure Regulator 1 (Clutch 1), Open Circuit
P17A1
Diagnosis information - PDK
Pressure regulator 1 (clutch 1), 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: P1830
- The following fault is not detected: P1838
Possible fault causes
- Open circuit in line between pressure regulator 1 and PDK control unit
- Pressure regulator 1 faulty
- PDK control unit faulty
Fault setting conditions
- Internal current measurement, pressure regulator 1: current consumption = 0 mA
- Line resistance between pressure regulator 1 and PDK control unit > 1 MOhm
Fault effects
- Pressure control switch-off, clutch 1
- Clutch 1 opening
- Engaged gear is held until vehicle stops.
- Moving off possible only in 2nd gear
- Transmission limp-home indication in instrument cluster control unit
Setpoint Definitions
P17A1
Setpoint definitions
NOTE: The specified values and value ranges correspond to the OK state in each case.
Line test setpoints
Short circuit to B+:
- Setpoint voltage -0.5 V --> +0.5 V
Short circuit to ground:
- Setpoint resistance > 0.9 MOhm
Open circuit:
- Setpoint resistance < 2 Ohm
NOTE: The specified values apply only at an ambient temperature of approx. 20 锟斤拷C (68 锟斤拷F) (room temperature).
Pressure regulator setpoints
- Internal resistance > 3.7 --> < 6.4 Ohm
