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Home >> Mitsubishi >> 1994 >> Montero LS, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests >> Computerized Engine Controls >> Engine Sensors & Switches >> Power Steering Oil Pressure Switch
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Power Steering Oil Pressure Switch

  1. Disconnect switch connector at pump. Using DVOM, check continuity between switch and vehicle ground. Continuity should not exist with wheels straight ahead and engine idling. Continuity should be present when wheels are turned to lock position or when pump pressure is increased.
  2. Check continuity of circuit between switch and ECM. Disconnect power steering oil pressure switch harness connector and ECM harness connector. See ENGINE CONTROL MODULE (ECM) LOCATION  table under COMPUTERIZED ENGINE CONTROLS. Connect jumper wire between ECM terminal and vehicle ground. See POWER STEERING PRESSURE SWITCH ECM TERMINAL IDENTIFICATION  table. Using DVOM, check for continuity between switch harness connector and vehicle ground. Check and repair circuit if no continuity exists. Go to step 3) if continuity exists.
  3. Connect ECM harness connector. Turn ignition on. Using DVOM, measure voltage at switch harness connector. System is okay if battery voltage exists. Substitute ECM with known good unit if voltage does not exist.
    POWER STEERING PRESSURE SWITCH ECM TERMINAL IDENTIFICATION

    Application (1) Terminal No.
    Montero (3.5L) 37
    Montero (3.0L) 5
    (1) See Figure and Figure .
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