2003 Toyota PriusFACTORY OEM SERVICE PROCEDURE

Inspect Washer Level Switch Continuity

WARNING: This page is about a different car, the 2002 Toyota Sequoia. However, it is still accessible from the selected car via links, so may be relevant.
  1. Check that there is no continuity between terminals with switch OFF (float up).
    Fig 1: Testing Washer Level Switch
    G01896061Courtesy of Β© TOYOTA, LICENSE AGREEMENT TMS1002
  2. Check that there is continuity between terminals with the switch ON (float down).

    If operation is not as specified, replace the jar & pump assembly.

Factory Service Tools

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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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