Diagnosis information - PDK
Double fault: two faults demand alternative measures with equal priority rating
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
Possible fault causes
- Analyse fault cause for faults also entered
Fault setting conditions
- Inadmissible combination of alternative measures
Fault effects
- Emergency hold function
- Transmission limp-home indication in instrument cluster control unit
Input Shaft Overspeed
P18A5
Diagnosis information - PDK
Input shaft overspeed
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
Possible fault causes
- Speed sensors faulty
- Lines faulty
Fault setting conditions
- Rotational speed of shaft 1 or shaft 2 below threshold value
- Rotational speed of shaft 1 or shaft 2 above threshold value
Fault effects
- No power transmission
- Limp-home message in instrument cluster
With P0604
P18A5
Diagnosis information - PDK
PDK control unit, internal fault
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
Possible fault causes
- Control unit faulty
2010 Porsche Cayman S (987) F6-3.4L Page 163
Fault setting conditions
- Internal diagnostic routine returns fault
Fault effects
- Power supply switch-off for pressure regulator
- Solenoid valve power supply switch-off
- Hydraulic control is switched off
- Start enable only in position P
- Limp-home message in instrument cluster
With P0605
P18A5
Diagnosis information - PDK
PDK control unit, internal fault
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
Possible fault causes
- Control unit faulty
Fault setting conditions
- Internal diagnostic routine returns fault
Fault effects
- Power supply switch-off for pressure regulator
- Solenoid valve power supply switch-off
- Hydraulic control is switched off
- Start enable only in position P
- Limp-home message in instrument cluster
With P0603
P18A5
Diagnosis information - PDK
PDK control unit, internal fault
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
Possible fault causes
- Control unit faulty
- Software faulty
Fault setting conditions
- Internal diagnostic routine returns fault
Fault effects
- Power supply switch-off for pressure regulator
- Solenoid valve power supply switch-off
- Hydraulic control is switched off
- Start enable only in position P
- Limp-home message in instrument cluster
Setpoint Definitions
P18A5
Setpoint definitions
NOTE: The specified values and value ranges correspond to the OK state in each case.
Line test setpoints
2010 Porsche Cayman S (987) F6-3.4L Page 164
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
Control unit setpoints
- Supply voltage terminal 30 9.1 V --> 16.4 V
- Voltage, terminal 15 9.5 V --> 16.0 V
With P1715
P18A5
Diagnosis information - PDK
SPI error
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
Possible fault causes
- PDK control unit faulty
Fault setting conditions
- Internal bus error
Fault effects
- All pressure regulators, solenoid valves and shift-lock switch off
- Start enable only in position P
- No emergency program diagnosis
- Emergency hold function
- Transmission limp-home indication in instrument cluster control unit
With P1804
P18A5
Diagnosis information - PDK
SPI error
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
Possible fault causes
- PDK control unit faulty
Fault setting conditions
- Internal bus error
Fault effects
- All pressure regulators, solenoid valves and shift-lock switch off
- Start enable only in position P
- Emergency hold function
- Transmission limp-home indication in instrument cluster control unit
Transmission Ratio Monitoring
P18A5
Diagnosis information - PDK
Transmission ratio monitoring
2010 Porsche Cayman S (987) F6-3.4L Page 165
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
Possible fault causes
- Speed sensors faulty
- Lines faulty
Fault setting conditions
- Rotational speed comparison of input shaft and output shaft supplies fault
Fault effects
- Limp-home message in instrument cluster
Software Monitoring, Calculation Of E-shift Position Implausible
Double fault: two faults demand alternative measures with equal priority rating
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
Possible fault causes
- Analyse fault cause for faults also entered
Fault setting conditions
- Inadmissible combination of alternative measures
Fault effects
- Emergency hold function
- Transmission limp-home indication in instrument cluster control unit
Input Shaft Overspeed
P18A5
Diagnosis information - PDK
Input shaft overspeed
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
Possible fault causes
- Speed sensors faulty
- Lines faulty
Fault setting conditions
- Rotational speed of shaft 1 or shaft 2 below threshold value
- Rotational speed of shaft 1 or shaft 2 above threshold value
Fault effects
- No power transmission
- Limp-home message in instrument cluster
With P0604
P18A5
Diagnosis information - PDK
PDK control unit, internal fault
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
Possible fault causes
- Control unit faulty
2010 Porsche Cayman S (987) F6-3.4L Page 163
Fault setting conditions
- Internal diagnostic routine returns fault
Fault effects
- Power supply switch-off for pressure regulator
- Solenoid valve power supply switch-off
- Hydraulic control is switched off
- Start enable only in position P
- Limp-home message in instrument cluster
With P0605
P18A5
Diagnosis information - PDK
PDK control unit, internal fault
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
Possible fault causes
- Control unit faulty
Fault setting conditions
- Internal diagnostic routine returns fault
Fault effects
- Power supply switch-off for pressure regulator
- Solenoid valve power supply switch-off
- Hydraulic control is switched off
- Start enable only in position P
- Limp-home message in instrument cluster
With P0603
P18A5
Diagnosis information - PDK
PDK control unit, internal fault
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
Possible fault causes
- Control unit faulty
- Software faulty
Fault setting conditions
- Internal diagnostic routine returns fault
Fault effects
- Power supply switch-off for pressure regulator
- Solenoid valve power supply switch-off
- Hydraulic control is switched off
- Start enable only in position P
- Limp-home message in instrument cluster
Setpoint Definitions
P18A5
Setpoint definitions
NOTE: The specified values and value ranges correspond to the OK state in each case.
Line test setpoints
2010 Porsche Cayman S (987) F6-3.4L Page 164
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
Control unit setpoints
- Supply voltage terminal 30 9.1 V --> 16.4 V
- Voltage, terminal 15 9.5 V --> 16.0 V
With P1715
P18A5
Diagnosis information - PDK
SPI error
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
Possible fault causes
- PDK control unit faulty
Fault setting conditions
- Internal bus error
Fault effects
- All pressure regulators, solenoid valves and shift-lock switch off
- Start enable only in position P
- No emergency program diagnosis
- Emergency hold function
- Transmission limp-home indication in instrument cluster control unit
With P1804
P18A5
Diagnosis information - PDK
SPI error
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
Possible fault causes
- PDK control unit faulty
Fault setting conditions
- Internal bus error
Fault effects
- All pressure regulators, solenoid valves and shift-lock switch off
- Start enable only in position P
- Emergency hold function
- Transmission limp-home indication in instrument cluster control unit
Transmission Ratio Monitoring
P18A5
Diagnosis information - PDK
Transmission ratio monitoring
2010 Porsche Cayman S (987) F6-3.4L Page 165
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
Possible fault causes
- Speed sensors faulty
- Lines faulty
Fault setting conditions
- Rotational speed comparison of input shaft and output shaft supplies fault
Fault effects
- Limp-home message in instrument cluster
Software Monitoring, Calculation Of E-shift Position Implausible