LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Acura >> 1999 >> Integra GS-R, 2D Coupe >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System & Component Testing >> Engine Sensors & Switches >> Vehicle Speed Sensor (VSS) >> 2.3CL
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Vehicle Speed Sensor (VSS): 2.3CL

  1. Test drive vehicle. Using scan tool, check vehicle speed. If correct speed is not indicated, go to next step. If correct speed is indicated, problem is intermittent. System is okay at this time. Check for poor connections or loose wires at VSS connector, harness connector located at left shock tower and PCM connectors. See WIRING DIAGRAMS article.
  2. Turn ignition off. Block rear wheels and set parking brake. Raise and support front of vehicle. Turn ignition on. Block right front wheel and slowly rotate left front wheel. Backprobing, measure voltage between PCM 25-pin connector terminal No. 20 (Brown/Black wire) and PCM 31-pin connector terminal No. 23 (Blue/White wire). If voltage does not toggle between zero and 5 volts and/or battery voltage, go to next step. If voltage toggles between zero and 5 volts and/or battery voltage, substitute a known-good PCM and recheck. If DTC does not reset, replace original PCM.
  3. Turn ignition off. Disconnect PCM 31-pin connector. Turn ignition on. Block right front wheel and slowly rotate left front wheel. Backprobing, measure voltage between PCM 25-pin connector terminal No. 20 (Brown/Black wire) and PCM 31-pin harness connector terminal No. 23 (Blue/White wire). If voltage toggles between zero and 5 volts and/or battery voltage, substitute a known-good PCM and recheck. If DTC does not reset, replace original PCM. If voltage does not toggle between zero and 5 volts and/or battery voltage, repair an open or short in Blue/White wire between PCM 31-pin connector and VSS connector. See WIRING DIAGRAMS article. If wire is okay, check VSS.
scientia non olet · About LEMON Manuals