Fault Code 0188
Fault code 0188Terminal 50 relay (activation 1)
Diagnostic conditions
- Internal KESSY control module function test
Possible cause of fault
- Short circuit to B+
- Short circuit to ground
- Open circuit in wiring
- Electrical fault in electric circuit
- Starter relay faulty
- Control unit faulty
Affected pins
- Plug A on control module: Pin 17
- Relay socket of starter relay in relay carrier in radiator tank E-box (relay no. 433): Pin A20C
Diagnosis/troubleshooting
NOTE:
Visual inspection: In the next troubleshooting section, please check first that the affected pins on the KESSY control module plug connection are neither damaged nor corroded. The wiring and plugs of the affected components must also be checked for external damage and correct contacts. Repair damaged or corroded pins if possible, otherwise replace affected pins. Repair or replace damaged wires.
NOTE: Conventional diagnosis/troubleshooting cannot be performed for the fault type 'short circuit to B+', which is displayed using the 'F8' key in the 9588 Porsche System Tester II. The reason for this is that the ignition cannot be switched on when there is no control module connected. As a result, it is not possible to differentiate uniquely between a short circuit to terminal 30 and a short circuit to terminal 15. A thorough visual inspection of components and wiring must therefore be carried out before replacing a control module.
This diagnosis/troubleshooting relates to all fault types for which a 'short circuit to B+' is detected:
This diagnosis/troubleshooting relates to all other fault types:
