Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual: How To Proceed With Troubleshooting

HINT:

• Use the following procedure to troubleshoot the navigation system.
• *: Use the Techstream.

• When troubleshooting, check that the problem symptoms have been accurately identified. Preconceptions should be discarded in order to make an accurate judgment. To clearly understand what the problem symptoms are, it is extremely important to ask the customer about the problem and the conditions at the time the malfunction occurred.
• Gather as much information as possible for reference. Past problems that seem unrelated may also help in some cases.
• The following 5 items are important points for problem analysis:

  What	Vehicle model, system name
  When	Date, time, occurrence frequency
  Where	Road conditions
  Under what conditions?	Driving conditions, weather conditions
  How did it happen?	Problem symptoms

HINT:

• A humid cabin and a rapid change in temperature may lead to condensation. Condensation in the cabin may cause a short circuit.
• The navigation system may not operate normally when the temperature is -20°C (-4°F) or lower, or 65°C (149°F) or higher.

HINT:

• Even if the problem symptom is not confirmed, check for DTCs. This is because the system stores history DTCs.
• If more information is needed, perform a recheck using the "System Check Mode" screen after rechecking for DTCs using the Techstream.
• Check for DTCs and inspect the area that the code indicates.

System Diagram

Customize Parameters

Other materials:

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