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Home >> Oldsmobile >> 1999 >> Intrigue GL, 3.5 H >> Repair and Diagnosis >> External Pages >> Different car >> Section 4 (Anti-Lock Brake System - TCS-ETS - DELPHI DBC 7) >> Diagnosis & Testing >> Pre-Diagnostic Inspection

Pre-Diagnostic Inspection

WARNING: This page is about a different car, the 1999 Buick Regal and 1999 Buick Century. However, it is still accessible from the selected car via links, so may be relevant.

When checking potential ABS/TCS-ETS faults, check following before performing diagnostic trouble code testing:

  1. Check all fuses related to ABS/TCS-ETS operation.
  2. Check all ABS/TCS-ETS wiring harness connectors for proper engagement, loose wires or terminals and/or corrosion. Check harness routing; pay particular attention to wheel speed sensor wiring harness routing.
  3. Ensure parking brake switch is functioning properly.
  4. Ensure brake switch is properly adjusted.
  5. Check brake system for leaks and proper fluid level.
  6. Check ABS/TCS-ETS ground circuit for clean tight connections.
  7. Always perform diagnostic system check before diagnosing DTCs. See DIAGNOSTIC SYSTEM CHECK  .
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