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Home >> Jaguar >> 2003 >> XJ8 Base >> Repair and Diagnosis >> External Pages >> Different car >> Section 112 (Module Communications Network) >> Module Communications Network >> Communications Network - Diagnostic Procedures >> Pinpoint Tests >> Pinpoint Test S: SLCM POWER SUPPLY OR GROUND FAULT

Pinpoint Test S: SLCM POWER SUPPLY OR GROUND FAULT

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  1. CHECK THE PERMANENT SUPPLY TO THE SLCM 

    Disconnect the SLCM electrical connector, BT40.

    Measure the voltage between BT40, pin 15 (NW) and GROUND.

    Is the voltage less than 10 volts? 

    YES:  REPAIR the circuit between the SLCM and battery. This circuit includes the rear power distribution box, (fuse 10) and the high power protection module. For additional information, refer to the wiring diagrams. Test the system for normal operation.

    NO:  Go to step  2.

  2. CHECK THE PERMANENT GROUND TO THE SLCM 

    Measure the resistance between BT40, pin 13 (BK) and GROUND.

    Measure the resistance between BT40, pin 14 (BK) and GROUND.

    Is either resistance greater than 5 ohms? 

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

    NO:  Check for DTCs indicating a faulty circuit. Contact dealer technical support for advice on possible SLCM failure