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Pinpoint Test C: CHECK THE SCP NETWORK CIRCUIT

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2006 Jaguar XKR, 2006 Jaguar XK8, 2005 Jaguar XKR, 2005 Jaguar XK8, and 2004 Jaguar XKR. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK FOR CORRECT BUS TERMINATION IN THE SCP + NETWORK 

    Measure the resistance between pins 02 (Y) and 05 (BK) of the diagnostic connector, FC53.

    Is the resistance between 90 and 150 ohms? 

    YES:  Termination is correct. Check for DTCs indicating a module or circuit fault. Refer to the DTC index.

    NO:  Go to step  2.

  2. CHECK THE SCP + FOR SHORT CIRCUIT TO BATTERY 

    Measure the voltage across pins 02 (Y) and 16 (NW) of the diagnostic connector.

    Is the voltage greater than 3 volts? 

    YES:  REPAIR the short circuit. For additional information, refer to the wiring diagrams. Test the system for normal operation.

    NO:  Go to step  3.

  3. CHECK THE SCP + FOR SHORT CIRCUIT TO IGNITION + 

    Turn the ignition switch to the ON position.

    Measure the voltage across pins 02 (Y) and 09 (WU) of the diagnostic connector.

    Is the voltage greater than 3 volts? 

    YES:  REPAIR the short circuit. For additional information, refer to the wiring diagrams. Test the system for normal operation.

    NO:  Go to step  4.

  4. CHECK THE SCP + FOR SHORT CIRCUIT TO GROUND 

    Measure the resistance between pins 02 (Y) and 05 (BK) of the diagnostic connector.

    Is the resistance less than 90 ohms? 

    YES:  REPAIR the short circuit. For additional information, refer to the wiring diagrams. Test the system for normal operation.

    NO:  Go to step  5.

  5. CHECK THE SCP - FOR SHORT CIRCUIT TO BATTERY 

    Measure the voltage across pins 10 (U) and 16 (NW) of the diagnostic connector.

    Is the voltage greater than 3 volts? 

    YES:  REPAIR the short circuit. For additional information, refer to the wiring diagrams. Test the system for normal operation.

    NO:  Go to step  6.

  6. CHECK THE SCP - FOR SHORT CIRCUIT TO IGNITION + 

    Turn the ignition switch to the ON position.

    Measure the voltage across pins 10 (U) and 09 (WU) of the diagnostic connector.

    Is the voltage greater than 3 volts? 

    YES:  REPAIR the short circuit. For additional information, refer to the wiring diagrams. Test the system for normal operation.

    NO:  Go to step  7.

  7. CHECK THE SCP - FOR SHORT CIRCUIT TO GROUND 

    Measure the resistance between pins 10 (U) and 05 (BK) of the diagnostic connector.

    Is the resistance less than 10,000 ohms? 

    YES:  REPAIR the short circuit. For additional information, refer to the wiring diagrams. Test the system for normal operation.

    NO:  Go to step  8.

  8. CHECK FOR SHORT CIRCUIT BETWEEN SCP + AND SCP - 

    Measure the resistance between pins 10 (U) and 02 (BK) of the diagnostic connector.

    Is the resistance less than 10,000 ohms? 

    YES:  REPAIR the short circuit. For additional information, refer to the wiring diagrams. Test the system for normal operation.

    NO:  Check for DTCs indicating a faulty module or circuit. Refer to Diagnostic Trouble Code (DTC) index .

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