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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 >> Diagnostic System Check

Diagnostic System Check

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.
  1. Reconnect all previously disconnected components. Turn ignition on, with engine off. Connect scan tool to Data Link Connector (DLC) under left side of instrument panel. If scan tool communicates with EBCM/EBTCM, go to next step. If scan tool does not communicate with EBCM/EBTCM, proceed to TEST G  under SYMPTOM TESTS.
  2. Using scan tool, display ABS/TCS-ETS DTCs. If any current DTCs are set, go to appropriate DTC for diagnosis. If no current DTCs are set, go to next step.
  3. Cycle ignition switch from off to on. If ANTI-LOCK light comes on and then cycles off, go to next step. If ANTI-LOCK light does not come on and then cycle off, go to step 7)  .
  4. Cycle ignition switch from off to on. If LOW TRAC light comes on and then cycles off, go to next step. If LOW TRAC light does not come on and then cycle off, go to step 8)  .
  5. Cycle ignition switch from off to on. If TRAC OFF light comes on and then cycles off, go to next step. If TRAC OFF light does not come on and then cycle off, go to step 9)  .
  6. Cycle ignition switch from off to on. If LOW TIRE light comes on and then cycles off, go to next step. If LOW TIRE light does not come on and then cycle off, go to step 10)  .
  7. If ANTI-LOCK light comes on and stays on go to TEST B  under SYMPTOM TESTS. If ANTI-LOCK light does not come on and stay on go to TEST A  under SYMPTOM TESTS.
  8. If LOW TRAC light comes on and stays on go to TEST C  under SYMPTOM TESTS. If LOW TRAC light does not come on and stay on go to TEST D  under SYMPTOM TESTS.
  9. If TRAC OFF light comes on and stays on go to TEST F  under SYMPTOM TESTS. If TRAC OFF light does not come on and stay on go to TEST E  under SYMPTOM TESTS.
  10. If LOW TIRE light comes on and stays on go to TEST H  under SYMPTOM TESTS. If LOW TIRE light does not come on and stay on go to TEST I  under SYMPTOM TESTS.
  11. If any history DTCs are set, go to next step. If no history DTCs are set, system is okay.
  12. Go to appropriate history DTC for diagnosis. Investigate conditions required for DTC to set. Drive vehicle faster than 15 MPH for several minutes while monitoring scan tool for ABS/TCS-ETS DTCs. Check if history DTC set as current DTC while driving vehicle. If any current DTCs are set, go to appropriate DTC for diagnosis. If no current DTCs are set, system is okay.
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