Lexus ES manuals

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.
General

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

Sonar Function

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

Buzzer Function

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

Display Function

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

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
RCTA Function (w/ Blind Spot Monitor System)

Symptom

Suspected Area

Link

Function does not operate at all

(Blind spot monitor function operates normally)

Data list / active test (Reverse)

Automatic transmission system (UA80E)

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
Rear Camera Detection Function (w/ 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:

 Evaporative Emission System Leak Detected (Large Leak) (P045500,P045600)

DTC SUMMARY DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory Note P045500 Evaporative Emission System Leak Detected (Large Leak) Leak detection pump creates negative pressure (vacuum) in EVAP system and EVAP system pressure is measured. Reference pressure

 EPB High Temperature (C13AA)

DESCRIPTION If the electric parking brake is used continuously, system operation is stopped to prevent the parking brake actuator assembly from overheating. This DTC is stored when system operation is stopped to prevent the parking brake actuator assembly from overheating and is not a malfunction.

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