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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, go to 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, Civic and Civic Del Sol, connect jumper between Brown/Red and Black wire terminals. On Prelude, connect jumper between Red/Green and Black wire terminals.
  3. On all models, check for voltage at test harness terminals A26 and B8. If voltage does not exist, replace PSP switch. If voltage exists, repair open in Brown/Red or Red/Green wire between ECM terminal B8 and PSP switch or Black wire between PSP switch and ground.
  4. If voltage did not exist in step 1), 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 Brown/Red or Red/Green wire between ECM terminal B8 and PSP switch.
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