How to Proceed With Troubleshooting

2002 Toyota Highlander 4WD L4-2.4L (2AZ-FE)SECTION How to Proceed With Troubleshooting
HOW TO PROCEED WITH TROUBLESHOOTING




Carry out troubleshooting in accordance with the procedure on the following page. Here, only the basic procedure is shown Details are provided in Diagnostics section, showing the most effective methods for each circuit. Confirm the troubleshooting procedures first for the relevant circuit before beginning troubleshooting of that circuit.
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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.