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Integra, MDX, 3.2CL & 3.2TL

  1. Turn ignition on. Measure voltage by backprobing between PCM 32-pin harness connector terminal No. 26 (Green wire, Light Blue on MDX) and PCM 25-pin harness connector terminal No. 20 (Brown/Yellow wire, Brown/Black on Integra). See Figure . If voltage is less than one volt, go to step  3 . If voltage is one volt or more, go to next step.
  2. Turn ignition off. Disconnect PSP switch 2-wire harness connector. Connect fused jumper wire between PSP switch 2-pin harness connector terminals. Turn ignition on. Measure voltage by backprobing between PCM 32-pin harness connector terminal No. 26 (Green wire, Light Blue on MDX ) and PCM 25-pin harness connector terminal No. 20 (Brown/Yellow wire, Brown/Black on Integra). See Figure . If voltage is less than one volt, replace PSP switch. If voltage is one volt or more, repair open in Green wire (Light Blue on MDX) between PCM 32-pin harness connector and PSP switch 2-pin harness connector. If Green wire (Light Blue on MDX) is okay, repair open in Black wire between ground and PSP switch 2-pin harness connector. See WIRING DIAGRAMS article.
  3. Start engine. Turn steering wheel slowly to full lock. Measure voltage by backprobing between PCM 32-pin harness connector terminal No. 26 (Green wire, Light Blue on MDX) and PCM 25-pin harness connector terminal No. 20 (Brown/Yellow wire, Brown/Black on Integra). See Figure . If battery voltage is not present, go to next step. If battery voltage is present, PSP signal is okay.
  4. Turn ignition off. Disconnect PSP switch 2-pin harness connector. Turn ignition on. Measure voltage by backprobing between PCM 32-pin harness connector terminal No. 26 (Green wire, Light Blue on MDX) and PCM 25-pin harness connector No. 20 (Brown/Yellow wire, Brown/Black on Integra). See Figure . If battery voltage is not present, go to next step. If battery voltage is present, replace PSP switch.
  5. Turn ignition off. Disconnect PCM 32-pin harness connector. Check continuity between ground and PCM 32-pin harness connector terminal No. 26 (Green wire, Light Blue on MDX). If continuity is present, repair short in Green wire (Light Blue on MDX) between PCM 32-pin harness connector terminal No. 26 and PSP switch 2-pin harness connector. If continuity is not present, cut temporary key from a non-immobilizer key blank and tape donor vehicle key to it backwards in order to deactivate immobilizer system during testing. Substitute known-good PCM, then recheck. If symptom or indication goes away, replace original PCM.
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