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Home >> Acura >> 1999 >> Integra GS-R, 4D Sedan >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System & Component Testing >> Idle Control System >> Power Steering Pressure (PSP) Switch Signal >> 3.5RL
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Power Steering Pressure (PSP) Switch Signal: 3.5RL

  1. Turn ignition on. Backprobing, measure voltage between PCM 26-pin connector terminal No. 26 (Brown/Black wire) and PCM 16-pin connector terminal No. 3 (Green wire). See Figure. If voltage is one volt or more, go to next step. If voltage is less than one volt, go to step  4.
  2. Turn ignition off. Disconnect PSP switch 2-pin connector. Connect a jumper wire between PSP switch harness connector terminals. Turn ignition on. Backprobing, measure voltage between PCM 26-pin connector terminal No. 26 (Brown/Black wire) and PCM 16-pin connector terminal No. 3 (Green wire). See Figure.
  3. If voltage is less than one volt, replace PSP switch. If voltage is one volt or more, repair open in Green wire between PCM 16-pin connector and PSP switch. See WIRING DIAGRAMS article. If Green wire is okay, repair open in circuit between PSP switch connector Green/Blue wire and PCM 22-pin connector terminal No. 22 (Green/Black wire).
  4. Start engine. Turn steering wheel slowly to full lock position. Backprobing, measure voltage between PCM 26-pin connector terminal No. 26 (Brown/Black wire) and PCM 16-pin connector terminal No. 3 (Green wire). See Figure. If battery voltage is present, PSP switch signal is okay. If battery voltage is not present, go to next step.
  5. Turn ignition off. Disconnect PSP switch 2-pin connector. Turn ignition on. Backprobing, measure voltage between PCM 26-pin connector terminal No. 26 (Brown/Black wire) and PCM 16-pin connector terminal No. 3 (Green wire). See Figure. If battery voltage exists, replace PSP switch. If battery voltage does not exist, go to next step.
    NOTE: When substituting a known-good PCM, immobilizer code must be rewritten to replacement PCM using Honda PGM tester, or engine will not start.
  6. Turn ignition off. Disconnect PCM 16-pin connector. Check continuity between ground and PCM 16-pin harness connector terminal No. 3 (Green wire). See Figure. If continuity exists, repair short in Green wire between PCM 16-pin connector and PSP switch. If continuity does not exist, substitute a known-good PCM, then recheck for battery voltage. If battery voltage exists, replace original PCM.
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