Transverse Interlock
Fault code 2409Servo motor brake
Diagnostic conditions
- Ignition on
- Transverse lock control unit internal function test
- Engine running
- Selector lever position 'P'
- Engage transverse lock
Possible causes of fault
- 'Electrical fault in electric circuit': open circuit/short circuit in wiring harness (brake for servo motor does not activate)
- 'Electrical fault in electric circuit': short in servo motor winding (brake) or open circuit/short circuit in servo motor leads (brake for servo motor does not activate)
- 'Electrical fault in electric circuit': control unit faulty (brake for servo motor does not activate)
- 'Mechanical fault': brake for servo motor does not hold
Affected pins
Transverse lock control unit plug:
- Pin 21 'supply voltage to brake for servo motor', to pin B10 of 'servo motor plug B'
- Pin 36 'supply voltage to brake for servo motor', to pin B9 of 'servo motor plug B'
Diagnosis/troubleshooting
NOTE:
Visual inspection: In the next troubleshooting section, please check first that the affected 'pins' of the transverse lock control unit plug connection and the 'pins' of the plug connections on the servo motor are neither damaged nor corroded. Remove any soiling or corrosion/oxidation. Replace damaged parts/wires.
NOTE:
Control unit replacement: Before replacing the 'transverse lock control unit', the ground connections, power supply and plug connections on the control unit must be checked as OK. Please observe the coding of the control unit. After the test drive, read out the fault memory again with the Porsche System Tester II No. 9588. Additional causes of faults that could damage the 'transverse lock control unit' should be detected and remedied.
Troubleshooting fault type: 'electrical fault in electric circuit'
Troubleshooting for fault type: 'mechanical fault'
