1993 Acura Integra GS-RFACTORY OEM SERVICE PROCEDURE

Automatic Transmission Shift Position Signal

  1. While watching shift indicator, shift transmission gear lever to each position. If shift indicator lights up correctly for all positions, turn ignition off.
  2. Connect ECM test harness between ECM and ECM connectors. Unplug connector "B" from main harness only. DO NOT  disconnect from ECM. Turn ignition on. Measure voltage between ECM terminals B7 (positive) and A26. See Figure .
  3. If voltage is about 5 volts, reconnect connector "B" to main wiring harness. Go to next step. If voltage is not as specified, substitute a known-good ECM and retest.
  4. Turn ignition off. Reconnect wire harness to ECM. Place transmission in Neutral. Start engine. Measure voltage between terminals B7 (positive) and A26 (negative) with transmission selector in Park and Neutral positions. If voltage is more than one volt, repair open in Green wire between ECM terminal B7 and gauge assembly. If voltage is less than one volt, go to next step.
  5. Set transmission selector to Drive position. Measure voltage between terminals B7 (positive) and A26 (negative). If voltage is not about 5 volts, repair short circuit in Light Green wire between ECM terminal B7 and combination meter.
  6. If voltage is about 5 volts, repair short circuit in Green wire between ECM terminal B7 and gauge assembly. If voltage is as specified, shift position signal is okay.
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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.

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