Lexus RX (RX 350L, RX450h) 2016-2023 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:

Lexus RX (RX 350L, RX450h) 2016-2023 Repair Manual > Airbag System: Pressure Sensor Difference for Front Door (B166A)
DESCRIPTION The door side airbag sensor LH and door side airbag sensor RH detect impacts to the vehicle through changes in pressure inside the front doors caused by deformation of the outer side of the front doors and send signals to the airbag sensor assembly. Based on the signals sent by the door ...

Lexus RX (RX 350L, RX450h) 2016-2023 Repair Manual > Intuitive Parking Assist System (w/ Intelligent Clearance Sonar System): CAN Communication Failure (Message Registry) (U1000)
DESCRIPTION If DTC U1000 is stored frequently, duplicate the conditions that cause the problem symptoms and perform the inspection again even if the DTC is not output when rechecking for DTCs. DTC No. Detection Item DTC Detection Condition Trouble Area U1000 CAN Communication Failure ...