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Home >> Geo >> 1993 >> Tracker Base, RWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests >> Engine Sensors & Switches >> Power Steering Pressure Switch
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Power Steering Pressure Switch

  1. Power steering pressure switch is located on power steering pump. With wheels in straight-ahead position, disconnect Blue/Orange wire at power steering pressure switch.
  2. With ignition on, ensure battery voltage exists on Blue/Orange wire. If battery voltage does not exist, check for open circuit in Blue/Orange wire between ECM and power steering pressure switch. ECM is located under left side of instrument panel, near kick panel.
    NOTE: If power steering pressure switch fails to close, or open circuit in wiring exists between ECM and pressure switch, engine may stall when wheels are turned. If power steering pressure switch fails to open or short to ground exists in wiring between ECM and pressure switch, idle quality will be affected.
  3. Connect ohmmeter across switch terminals. Start engine. Check for continuity to ground while turning wheels from straight-ahead position to full turn. Switch should close and continuity should exist when wheels are in a full turn position. Replace switch if defective.
THROTTLE POSITION (TP) SENSOR RESISTANCE

Application Condition Ohms
Between Terminals C & D (1) 0-500
Between Terminals C & D (2) No Continuity
Between Terminals A & D 3500-6500
Between Terminals B & D At Idle (3) 300-2000
At Wide Open Throttle 2000-6500
(1) With .012" (.30 mm) feeler gauge installed between stop screw and lever.
(2) With .022" (.56 mm) feeler gauge installed between
(3) To position throttle valve at idle, apply about 18 in. Hg vacuum to throttle opener valve. stop screw and lever.
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