Lexus RX (RX 350L, RX450h) 2016-2024 Repair Manual: Problem Symptoms Table
PROBLEM SYMPTOMS TABLE
HINT:
- Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
- Inspect the fuses and relays related to this system before inspecting the suspected areas below.
- When an open circuit or frozen indication is displayed by the self-check function, check for DTCs and troubleshoot according to each inspection procedure.
| Symptom | Suspected Area | Link |
|---|---|---|
| System does not operate at all | Proceed to "Clearance Warning ECU Power Source Circuit" | |
| CAN communication system | | |
| Clearance warning ECU assembly | | |
| System cannot be turned off | CAN communication system | |
| Clearance warning ECU assembly | |
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| Symptom | Suspected Area | Link |
|---|---|---|
| Frozen indication is displayed in self-check function. | Proceed to "Sensor Frozen Indication (Dirty or Frozen)" | |
| Combination meter assembly (shift selection) operates normally, but detection operates when shift lever is in P, or detection does not operate when shift lever is in any position other than P (front sonar) | CAN communication system | |
| Clearance warning ECU assembly | | |
| Combination meter assembly (shift selection) operates normally, but detection operates when shift lever is not in R, or does not operate with shift lever in R (rear sonar) | CAN communication system | |
| Clearance warning ECU assembly | | |
| Combination meter assembly (speedometer) operates normally, but detection does not operate when vehicle speed meets operation condition, or detection operates when vehicle speed does not meet operation condition (front sonar) | CAN communication system | |
| Clearance warning ECU assembly | |
| Symptom | Suspected Area | Link |
|---|---|---|
| Sonar detection operation is normal but buzzer does not sound | Check that the temporary mute function is not operating | - |
| Proceed to "No. 1 Clearance Warning Buzzer Circuit" | | |
| Proceed to "No. 2 Clearance Warning Buzzer Circuit" | | |
| Clearance warning ECU assembly | |
| Symptom | Suspected Area | Link |
|---|---|---|
| Detection operation is normal but clearance sonar indicator does not illuminate | CAN communication system | |
| Combination meter assembly (LED): Perform Active Test (Indicat. Clearance Sonar LCD) | | |
| Combination meter assembly | | |
| Clearance warning ECU assembly | | |
| Detection operation is normal but all sonar displays do not appear on multi-information display and multi-display | CAN communication system | |
| Clearance warning ECU assembly | | |
| Detection operation is normal but sonar displays do not appear on multi-information display | CAN communication system | |
| Combination meter assembly | | |
| Clearance warning ECU assembly | | |
| Detection operation is normal but sonar displays do not appear on the screen display (on the multi-display assembly) | CAN communication system | |
| Multi-display assembly | | |
| Radio receiver assembly | | |
| Clearance warning ECU assembly | | |
| Detection operation is normal but sonar displays do not appear on the cooperated display (on the multi-display assembly)*1 | CAN communication system | |
| Multi-display assembly | | |
| Parking assist ECU | | |
| Clearance warning ECU assembly | | |
| Detection operation is normal but sonar displays do not appear on the cooperated display (on the multi-display assembly)*2 | CAN communication system | |
| Multi-display assembly | | |
| Rear television camera assembly | | |
| Clearance warning ECU assembly | | |
| Detection operation is normal but sonar displays do not appear on the cooperated display (on the headup display)*3 | CAN communication system | |
| Headup display (meter mirror sub-assembly) | | |
| Clearance warning ECU assembly | |
- *1: w/ Panoramic View Monitor System
- *2: w/ Parking Assist Monitor System
- *3: w/ Headup Display System
Calibration
CALIBRATION NOTICE: When any of the following parts have been replaced, perform adjustment shown in the following table. If not, the intuitive parking assist system may not operate correctly. ADJUST I ...
Terminals Of Ecu
TERMINALS OF ECU CLEARANCE WARNING ECU ASSEMBLY (a) Disconnect the J38 clearance warning ECU assembly connector. (b) Measure the voltage and resistance on the wire harness side connector according to ...
Other materials:
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Lexus RX (RX 350L, RX450h) 2016-{YEAR} Owners Manual
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Lexus RX (RX 350L, RX450h) 2016-{YEAR} Repair Manual
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