2004 Toyota PriusFACTORY OEM SERVICE PROCEDURE

Problem Symptoms Table

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.
PROBLEM SYMPTOMS TABLE - REAR WIPER AND WASHER SYSTEM

Symptom Suspect Area
Rear wiper does not operate.
  1. Wiper switch circuit
  2. Wiper motor circuit
  3. Back door power window limit switch circuit
  4. Body ECU
  5. Back door ECU
Rear washer does not operate.
  1. Washer switch circuit
  2. Washer motor circuit
  3. Wire harness
  4. Body ECU
Wiper does not operate when washer switch is ON.
  1. Wiper switch circuit
  2. Body ECU
PROBLEM SYMPTOMS TABLE - BACK DOOR POWER WINDOW CONTROL SYSTEM

Symptom Suspect Area
Back door power window does not operate.
  1. Back door power window switch circuit

  1. Back door power window limit switch circuit
  2. Back door power window motor circuit
  3. Body ECU
  4. Back door ECU
Back door lock does not operate.
  1. Back door control switch circuit
  2. Back door lock motor circuit
  3. Back door ECU
Luggage room light does not light.
  1. Luggage room light circuit
  2. Back door courtesy switch circuit
  3. Body door ECU
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:

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

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