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Power Steering Pressure (PSP) Switch

  1. Connect test harness between ECM and wiring harness. See Figure . Turn ignition on. Measure voltage between test harness terminals B8 and A26. See Figure . If voltage is greater than one volt, proceed to the next step. If voltage is not greater than one volt, go to step 4).
  2. Unplug connector on PSP switch. Switch is located on steering gear. On Accord, connect jumper wire between Green and Black wire terminals. Connect jumper wire between Red/Green and Black wire terminals.
  3. Check for voltage at test harness terminals A26 and B8. If voltage does not exist, replace PSP switch. If voltage exists, repair open in Red/Green wire between ECM terminal B8 and PSP switch, or Black wire between PSP switch and ground.
  4. Start engine. Turn steering wheel slowly. Measure voltage between test harness terminals A26 and B8. If battery voltage exists, PSP signal is okay. If battery voltage does not exist, go to next step.
  5. Turn ignition off. Unplug test harness connector "B" from main wiring harness only, not ECM. Turn ignition on. If battery voltage exists, go to next step. If battery voltage does not exist, replace ECM and retest system.
  6. Reconnect harness connector "B" to main wiring harness. Unplug connector from PSP switch. If battery voltage exists, replace PSP switch. If battery voltage does not exist, repair short in Green, Brown/Red or Red/Green wire between ECM terminal B8 and PSP switch.
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