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Home >> Chevrolet >> 2000 >> Prizm Base, Standard >> Repair and Diagnosis >> Accessories & Equipment >> Communication Devices >> Data Link Communications System >> System Tests >> Test A: Scan Tool Does Not Power Up >> Diagnostic Procedure

Diagnostic Procedure

  1. Test the battery positive voltage circuit of the DLC for an open or a short to ground. If there is no fault, go to next step. If there is any fault, repair and recheck system operation.
  2. Test the ground circuit at DLC terminal No. 4 for an open. If there is no fault, go to next step. If there is any fault, repair and recheck system operation.
  3. Inspect for poor connections at DLC terminals No. 4 and 16. If there is no fault, go to next step. If there is any fault, repair and recheck system operation.
  4. The scan tool may be malfunctioning. Refer to the scan tool user guide.
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