1992 Acura Vigor LS, AutomaticFACTORY OEM SERVICE PROCEDURE

Code 17: Vehicle Speed Sensor (VSS)

  1. Turn ignition off. Remove BACK UP fuse from underhood fuse/relay box for 10 seconds to reset ECU. Road test vehicle. While in 2nd gear, accelerate until engine speed reaches 4000 RPM, and then with throttle fully closed decelerate to 1500 RPM.
  2. Check ECU for fault codes. See RETRIEVING CODES  . If Code 17 is not present, problem is intermittent. Check for poor connections at ECU connector and VSS connector. Test drive vehicle and retest.
  3. If Code 17 is present, raise and support vehicle. Connect ECU Test Harness (07LAJ-PT3010A ) between ECU and ECU connector. See Figure . Turn ignition on. Slowly rotate left front wheel and measure voltage between test terminals A26 (-) and B10 (+). If voltage pulses between 0-5 volts, substitute a known good ECU and retest. If specified voltage is now present, replace original ECU.
  4. If voltage does not pulse 0-5 volts in step 3), turn ignition off. Disconnect test harness "B" connector from ECU, leaving wiring harness connected. Turn ignition on. Slowly rotate left front wheel while measuring voltage between test terminals A26 and B10.
  5. If voltage does not pulse 0-5 volts, repair open or short in Orange wire between ECU connector terminal B10 (+) and VSS or cruise control unit. If wire is okay, replace VSS. If voltage pulses 0-5 volts, substitute a known good ECU, and recheck. If symptom/condition goes away, replace original ECU.
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.