1990 Chevrolet Cavalier Base, 4D Wagon, 3.1 T, Automatic, 125C/MD9FACTORY OEM SERVICE PROCEDURE

Power Steering (P/S) Switch

This switch informs ECM of engine load conditions which exist when steering wheel is turned from center to full lock position. Information is used by ECM to help control idle speed. To check function of P/S switch, perform functional check of switch. See SYSTEMS & COMPONENT TESTING article in this section.

Factory Service Tools

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.

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