Lexus NX: Problem Symptoms Table

PROBLEM SYMPTOMS TABLE

NOTICE:

When replacing the combination meter assembly, always replace it with a new one. If a combination meter assembly which was installed to another vehicle is used, the information stored in it will not match the information from the vehicle and a DTC may be stored.

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.
General

Symptom

Suspected Area

Link

System does not operate at all

Intuitive Parking Assist System (w/ Intelligent Clearance Sonar System)

CAN communication system

Steering pad switch assembly

Spiral cable sub-assembly

Clearance warning ECU assembly

Sonar Function

Symptom

Suspected Area

Link

Detection function operates when the operating conditions are not met

Hybrid control system

Clearance warning ECU assembly

Detection function operates when vehicle is not within the required speed range (speedometer not malfunctioning)

Clearance warning ECU assembly

Buzzer Function

Symptom

Suspected Area

Link

Intelligent clearance sonar system is normal but buzzer operation is intermittent

Check that the temporary mute or auto 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

Combination meter assembly

Display Function

Symptom

Suspected Area

Link

While the ICS system is operating, no ICS notifications are displayed on the multi-information display.

CAN communication system

Clearance warning ECU assembly

Combination meter assembly

While the ICS system is operating, no ICS notifications are displayed on the headup display.*

CAN communication system

Clearance warning ECU assembly

Meter mirror sub-assembly

"Parking Support Brake Malfunction Visit Your Dealer" is displayed

Combination meter assembly

Clearance warning ECU assembly

"Parking Support Brake Unavailable" is displayed

Check that no foreign matter is attached to the ultrasonic sensors.

-

Steering angle neutral point (Intelligent clearance sonar system registration)

CAN communication system

Combination meter assembly

Clearance warning ECU assembly

ICS does not operate when there is a possibility of a collision (Warning message "Parking Support Brake Unavailable" not displayed)

Check the installation of the ultrasonic sensors (front)

Check the installation of the ultrasonic sensors (rear)

Adjust the installation of the ultrasonic sensors as necessary.

Ultrasonic sensors (front)

Ultrasonic sensors (rear)

Clearance warning ECU assembly

ICS control operates when there is no possibility of a collision

Check the installation of the ultrasonic sensors (front)

Check the installation of the ultrasonic sensors (rear)

Adjust the installation of the ultrasonic sensors as necessary.

Ultrasonic sensors (front)

Ultrasonic sensors (rear)

Clearance warning ECU assembly

ICS control cannot be turned off (ICS OFF indicator does not illuminate)

CAN communication system

Combination meter assembly (LED): Perform Active Test (Indicat. ICS OFF LCD)

Steering pad switch assembly

Spiral cable sub-assembly

Clearance warning ECU assembly

ICS OFF indicator blinks

If "Yes" is displayed for the Data List item "BSM Radar Communication Invalid History", the blind spot monitor system may be malfunctioning.

Check that no foreign matter is attached to the ultrasonic sensors.

-

Steering angle neutral point (Intelligent clearance sonar system registration)

Combination meter assembly

Clearance warning ECU assembly

*: w/ Headup Display

READ NEXT:

 Terminals Of Ecu

TERMINALS OF ECU CLEARANCE WARNING ECU ASSEMBLY (a) Disconnect the I20 clearance warning ECU assembly connector. (b) Measure the voltage and resistance on the wire harness side connector according to

 Diagnosis System

DIAGNOSIS SYSTEM DESCRIPTION (a) Intelligent clearance sonar system data and Diagnostic Trouble Codes (DTCs) can be read from the Data Link Connector 3 (DLC3) of the vehicle. When the system seems to

 Dtc Check / Clear

DTC CHECK / CLEAR CHECK DTC (a) Connect the Techstream to the DLC3. (b) Turn the power switch on (IG). (c) Turn the intelligent clearance sonar system on. (d) Turn the Techstream on. (e) Enter the fol

SEE MORE:

 Disposal

DISPOSAL CAUTION / NOTICE / HINT CAUTION: Before performing pre-disposal deployment of any SRS part, review and closely follow all applicable environmental and hazardous material regulations. Pre-disposal deployment may be considered hazardous material treatment. PROCEDURE 1. PRECAUTION CAUTION:

 No Answer-Back

DESCRIPTION In some cases, wireless door lock control functions are normal but the hazard warning light and/or wireless door lock buzzer answer-back function does not operate. In such cases, hazard warning light and wireless door lock buzzer signal outputs from the main body ECU (multiplex network b

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