Lexus ES: 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 | | |
| Meter / gauge system | | |
| Clearance warning ECU assembly | | |
| System cannot be turned off | CAN communication system | |
| Meter / gauge system | | |
| Clearance warning ECU assembly | |
| 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 full screen display (on the multi-display)*2 | CAN communication system | |
| Rear Television Camera Assembly | | |
| Mluti-display assembly | | |
| Clearance warning ECU assembly | | |
| Detection operation is normal but sonar displays do not appear on the interruption display (on the multi-display)*1 | CAN communication system | |
| Mluti-display assembly | | |
| Parking assist ECU | | |
| Clearance warning ECU assembly | | |
| Detection operation is normal but sonar displays do not appear on the interruption display (on the multi-display)*2 | CAN communication system | |
| Proceed to "The Display of the Multi-display does not Switched" | | |
| Rear Television Camera Assembly | | |
| Mluti-display assembly | .gif) | |
| Clearance warning ECU assembly | | |
| Detection operation is normal but sonar displays do not appear on the interruption display (on the headup display)*3 | CAN communication system | |
| Meter mirror sub-assembly | | |
| Clearance warning ECU assembly | |
- *1: w/ Panoramic View Monitor System
- *2: w/o Panoramic View Monitor System
- *3: w/ Headup Display System
| Symptom | Suspected Area | Link |
|---|---|---|
| Function does not operate at all (Blind spot monitor function operates normally) | Data list / active test (Reverse) | |
| Hybrid control system | | |
| Blind spot monitor sensor LH | | |
| "CHECK RCTA SYSTEM" or "RCTA NOT AVAILABLE" is displayed on the multi-information display | Check abnormality history | |
| Blind spot monitor sensor LH | | |
| Blind spot monitor sensor RH | | |
| Combination meter assembly | | |
| While RCTA function is active, outer rear view mirror indicator flashes but RCTA buzzer does not sound | Proceed to "Buzzer does not Sound" | |
| When shift lever is in R, detection operation is normal but RCTA indicator does not appear on multi-display | CAN communication system | |
| Blind spot monitor sensor RH | | |
| Blind spot monitor sensor LH | | |
| Mluti-display assembly | | |
| Parking assist ECU *1 | | |
| Rear television camera assembly*2 | |
- *1: w/ Panoramic View Monitor System
- *2: w/o Panoramic View Monitor System
| Symptom | Suspected Area | Link |
|---|---|---|
| When the multi-display screen is displayed, "RCD unavailable" is displayed | Correct the steering angle neutral point (Initialization) | |
| Blind spot monitor system | | |
| Rear television camera assembly | | |
| When the multi-display screen is displayed, "RCD malfunction. Visit your dealer" is displayed | Rear television camera assembly | |
| When there is a pedestrian in the detection area, no pedestrian is detected | "Situations in which pedestrians cannot be detected normally." in precaution | |
| Perform calibration | | |
| Rear television camera assembly | | |
| When there is no pedestrian in the detection area, a pedestrian is detected | "Situations in which pedestrians cannot be detected normally." in precaution | |
| Perform calibration | | |
| Rear television camera assembly | | |
| A pedestrian who is in the absolute no detection area*3 is detected | Perform calibration | |
| Rear television camera assembly | | |
| A pedestrian is only detected when they are in the absolute detection area*3 | Perform calibration | |
| Rear television camera assembly | |
- *1: w/o Navigation System
- *2: w/ Navigation System
- *3: Refer to "Operation Explanation" in system description
READ NEXT:
Sensor Frozen Indication (Dirty or Frozen)
DESCRIPTION When the ultrasonic sensor is dirty or frozen, "Parking Assist Unavailable Clean Parking Assist Sensor" is displayed on the multi-information display in the combination meter assembly. PRO
System Description
SYSTEM DESCRIPTION GENERAL (a) The parking support alert system has a static objects function, rear crossing vehicles function, and rear pedestrians.
Parking Support Alert (static objects) function
System Diagram
SYSTEM DIAGRAM for 12.3 inch display w/o Panoramic View Monitor System w/ Blind Spot Monitor System w/ Panoramic View Monitor System
SEE MORE:
Components
COMPONENTS ILLUSTRATION *1 FRONT FENDER LINER RETAINER *2 FRONT WHEEL OPENING EXTENSION PAD RH *3 PIN HOLD CLIP *4 REAR FENDER SPLASH SHIELD SUB-ASSEMBLY RH *5 WINDSHIELD WASHER MOTOR AND PUMP ASSEMBLY - -
Diagnosis System
DIAGNOSIS SYSTEM DESCRIPTION The main body ECU (multiplex network body ECU) and certification ECU (smart key ECU assembly) control the LIN communication system. LIN communication system data and Diagnostic Trouble Codes (DTCs) can be read through the Data Link Connector 3 (DLC3). When the system see
