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Home >> Buick >> 2000 >> LeSabre Custom, 4T65E/M15 >> Repair and Diagnosis >> Body & Frame >> Body, Cab Control Systems >> Body Control Modules >> Self-Diagnostic System >> Scan Tool Does Not Power Up
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Scan Tool Does Not Power Up

  1. Check for battery voltage at Data Link Connector (DLC) terminal No. 16 (Orange wire). See Figure . If battery voltage exists, go to next step. If battery voltage does not exist, repair open or short to ground in Orange wire between DLC and ALDL fuse (10-amp) located in rear fuse block. Perform appropriate diagnostic system check. See appropriate article for malfunctioning system or device.
  2. Check for open in Black wire between DLC terminal No. 4 and ground. Ground is located at right "A" pillar. Repair as necessary and perform appropriate diagnostic system check. See appropriate article for malfunctioning system or device. If ground circuit is okay, go to next step.
  3. Check for poor connections between scan tool and DLC terminals No. 4 and 16. Repair as necessary and perform appropriate diagnostic system check. See appropriate article for malfunctioning system or device. If no problems are found, go to next step.
  4. Scan tool may be malfunctioning. Check scan tool manual for diagnostic procedures. After repairs, perform appropriate diagnostic system check. See appropriate article for malfunctioning system or device.
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