Lexus NX: Problem Symptoms Table
PROBLEM SYMPTOMS TABLE
NOTICE:
-
The vehicle is equipped with a Supplemental Restraint System (SRS) which includes components such as airbags. Before servicing (including removal or installation of parts), be sure to read the precaution for Supplemental Restraint System.
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- 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.
- 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" | |
| Meter / gauge system | | |
| CAN communication system | | |
| Steering pad switch assembly | | |
| Spiral cable sub-assembly | | |
| Clearance warning ECU assembly | | |
| System cannot be turned off | CAN communication system | |
| Meter / gauge system | | |
| Steering pad switch assembly | | |
| Spiral cable sub-assembly | | |
| Clearance warning ECU assembly | | |
| Harness or connector | - |
| 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 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 | |
| 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 multi-display (on the multi-display assembly) | CAN communication system | |
| Multi-display assembly | | |
| Rear television camera assembly*1 | | |
| Parking assist ECU*2 | | |
| Clearance warning ECU assembly | |
- *1: w/ Parking Assist Monitor System
- *2: w/ Panoramic View Monitor System
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) When troubleshooting a vehicle with a diagnosis system, the only difference from the usual troubleshooting procedure is connecting the Techstream to the vehicle and re
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 intuitive parking assist system on. (d) Turn the Techstream on. (e) Enter the follow
SEE MORE:
Screen Flicker or Color Distortion
PROCEDURE 1. CHECK DISPLAY SETTING (a) Reset display settings (contrast, brightness) and check that the screen appears normal. OK: The display returns to normal. OK END (DISPLAY SETTING WAS CAUSE OF MALFUNCTION) NG PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TA
Air Outlet Damper Control Servo Motor Circuit (Rear) (B1449)
DESCRIPTION The No. 2 air conditioning radiator damper servo sub-assembly sends pulse signals to inform the air conditioning amplifier assembly of the damper position. The air conditioning amplifier assembly activates the motor (normal or reverse) based on these signals to move the No. 2 air conditi
