P17AC
Diagnosis information - PDK
Electrical pressure adjuster 4, shunt
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: P1832
- The following fault is not detected: P183A
- The following fault is not detected: P1842
Possible fault causes
- Shunt circuit in line between pressure regulator 4 and PDK control unit
- Pressure regulator 4 faulty
- PDK control unit faulty
Fault setting conditions
- Actual pressure regulator current < setpoint current (maximum deviation = 35 mA)
Fault effects
- Power supply switch-off, pressure regulator for system pressure and synchro selection
- Power supply switch-off, solenoid valves
- Pressure regulator for system pressure and synchro selection, switch-off
- Solenoid valves switch-off
- Last gear held
- Transmission limp-home indication in instrument cluster control unit
With P17A4
P17AC
Diagnosis information - PDK
Electrical pressure adjuster 4, shunt
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: P1832
- The following fault is not detected: P183A
- The following fault is not detected: P1842
Possible fault causes
- Shunt circuit in line between pressure regulator 4 and PDK control unit
- Pressure regulator 4 faulty
- PDK control unit faulty
Fault setting conditions
- Actual pressure regulator current > setpoint current (maximum deviation = 35 mA)
Fault effects
- Power supply switch-off, pressure regulator for system pressure and synchro selection
- Power supply switch-off, solenoid valves
2010 Porsche Cayman S (987) F6-3.4L Page 12
- Pressure regulator for system pressure and synchro selection, switch-off
- Solenoid valves switch-off
- Last gear held
- Transmission limp-home indication in instrument cluster control unit
Pressure Regulator 4 (System Pressure), Open Circuit
P17AC
Diagnosis information - PDK
Pressure regulator 4 (system 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: P1832
- The following fault is not detected: P183A
- Pressure regulator 4 active
Possible fault causes
- Line between pressure regulator 4 and PDK control unit faulty
- Pressure regulator 4 faulty
- PDK control unit faulty
Fault setting conditions
- Internal current measurement, pressure regulator 4: current consumption = 0 mA
- Line resistance between pressure regulator 4 and PDK control unit > 1 MOhm
Fault effects
- System pressure control switch-off
- Pressure regulator 4 switch-off
- 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 4 (System Pressure), Short Circuit To Ground
P17AC
Diagnosis information - PDK
Pressure regulator 4 (system pressure), 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: P1832
- The following fault is not detected: P183A
Possible fault causes
- Line between pressure regulator 4 and PDK control unit, short circuit to ground
- Pressure regulator 4 faulty
- PDK control unit faulty
Fault setting conditions
- Internal current measurement, actuator solenoid R/P: current consumption = 0 mA
- Pressure regulator 4, internally measured control current = 0 mA
- Pressure regulator 4, measured voltage = 0 V
Fault effects
- Power supply switch-off for pressure regulators 4 to 6
- Power supply switch-off for solenoid valves 1 and 2
- Pressure regulator 4 switch-off
- Pressure regulator 5 switch-off
- Pressure regulator 6 switch-off
- Solenoid valve 1 switch-off
- Solenoid valve 2 switch-off
- Engaged gear is held until vehicle stops.
2010 Porsche Cayman S (987) F6-3.4L Page 13
- Moving off possible in all gears
- Transmission limp-home indication in instrument cluster control unit
Pressure Regulator 4 (System Pressure), Short Circuit To B+
P17AC
Diagnosis information - PDK
Pressure regulator 4 (system 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: P1832
- The following fault is not detected: P183A
Possible fault causes
- Line between pressure regulator 4 and PDK control unit, short circuit to B+
- Pressure regulator 4 faulty
- PDK control unit faulty
Fault setting conditions
- Internal current measurement, actuator solenoid R/P: current consumption = 0 mA
- Pressure regulator 4, control current > 850 mA
Fault effects
- Pressure regulator 4 switch-off
- 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
P17AC
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 °C (68 °F) (room temperature).
Pressure regulator setpoints
- Internal resistance > 3.7 --> < 6.4 Ohm
Setpoint Definitions
Diagnosis information - PDK
Electrical pressure adjuster 4, shunt
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: P1832
- The following fault is not detected: P183A
- The following fault is not detected: P1842
Possible fault causes
- Shunt circuit in line between pressure regulator 4 and PDK control unit
- Pressure regulator 4 faulty
- PDK control unit faulty
Fault setting conditions
- Actual pressure regulator current < setpoint current (maximum deviation = 35 mA)
Fault effects
- Power supply switch-off, pressure regulator for system pressure and synchro selection
- Power supply switch-off, solenoid valves
- Pressure regulator for system pressure and synchro selection, switch-off
- Solenoid valves switch-off
- Last gear held
- Transmission limp-home indication in instrument cluster control unit
With P17A4
P17AC
Diagnosis information - PDK
Electrical pressure adjuster 4, shunt
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: P1832
- The following fault is not detected: P183A
- The following fault is not detected: P1842
Possible fault causes
- Shunt circuit in line between pressure regulator 4 and PDK control unit
- Pressure regulator 4 faulty
- PDK control unit faulty
Fault setting conditions
- Actual pressure regulator current > setpoint current (maximum deviation = 35 mA)
Fault effects
- Power supply switch-off, pressure regulator for system pressure and synchro selection
- Power supply switch-off, solenoid valves
2010 Porsche Cayman S (987) F6-3.4L Page 12
- Pressure regulator for system pressure and synchro selection, switch-off
- Solenoid valves switch-off
- Last gear held
- Transmission limp-home indication in instrument cluster control unit
Pressure Regulator 4 (System Pressure), Open Circuit
P17AC
Diagnosis information - PDK
Pressure regulator 4 (system 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: P1832
- The following fault is not detected: P183A
- Pressure regulator 4 active
Possible fault causes
- Line between pressure regulator 4 and PDK control unit faulty
- Pressure regulator 4 faulty
- PDK control unit faulty
Fault setting conditions
- Internal current measurement, pressure regulator 4: current consumption = 0 mA
- Line resistance between pressure regulator 4 and PDK control unit > 1 MOhm
Fault effects
- System pressure control switch-off
- Pressure regulator 4 switch-off
- 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 4 (System Pressure), Short Circuit To Ground
P17AC
Diagnosis information - PDK
Pressure regulator 4 (system pressure), 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: P1832
- The following fault is not detected: P183A
Possible fault causes
- Line between pressure regulator 4 and PDK control unit, short circuit to ground
- Pressure regulator 4 faulty
- PDK control unit faulty
Fault setting conditions
- Internal current measurement, actuator solenoid R/P: current consumption = 0 mA
- Pressure regulator 4, internally measured control current = 0 mA
- Pressure regulator 4, measured voltage = 0 V
Fault effects
- Power supply switch-off for pressure regulators 4 to 6
- Power supply switch-off for solenoid valves 1 and 2
- Pressure regulator 4 switch-off
- Pressure regulator 5 switch-off
- Pressure regulator 6 switch-off
- Solenoid valve 1 switch-off
- Solenoid valve 2 switch-off
- Engaged gear is held until vehicle stops.
2010 Porsche Cayman S (987) F6-3.4L Page 13
- Moving off possible in all gears
- Transmission limp-home indication in instrument cluster control unit
Pressure Regulator 4 (System Pressure), Short Circuit To B+
P17AC
Diagnosis information - PDK
Pressure regulator 4 (system 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: P1832
- The following fault is not detected: P183A
Possible fault causes
- Line between pressure regulator 4 and PDK control unit, short circuit to B+
- Pressure regulator 4 faulty
- PDK control unit faulty
Fault setting conditions
- Internal current measurement, actuator solenoid R/P: current consumption = 0 mA
- Pressure regulator 4, control current > 850 mA
Fault effects
- Pressure regulator 4 switch-off
- 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
P17AC
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 °C (68 °F) (room temperature).
Pressure regulator setpoints
- Internal resistance > 3.7 --> < 6.4 Ohm
Setpoint Definitions