Lexus NX: 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 symptom 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.
Headup Display System

Symptom

Suspected Area

Link

Headup display is not displayed.

Proceed to "Main Switch Circuit"

Fuse (ECU-B NO.1)

-

Wire harness or connector

-

Meter mirror sub-assembly

Brightness of the headup display does not change.

Perform Active Test (Display Brightness)

Read the Data List (Brightness Up Switch (Meter)), Brightness Down Switch (Meter))

Meter mirror sub-assembly

Headup display is not displayed in the correct position.

Perform Active Test (Display Position)

Read the Data List (Projection Position Up Switch (Meter), Projection Position Down Switch (Meter))

Meter mirror sub-assembly

Other headup display malfunction (Other systems are normal)

Meter mirror sub-assembly

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 Terminals Of Ecu

TERMINALS OF ECU HEADUP DISPLAY (METER MIRROR SUB-ASSEMBLY) (a) Measure the voltage and resistance according to the value(s) in the table below. Terminal No. (Symbol) Wiring Color Terminal Des

 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 Techstream on. (d) Enter the following menus: Body Electrical / Head Up Display / Tr

 Data List / Active Test

DATA LIST / ACTIVE TEST DATA LIST NOTICE: In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a pa

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 Precaution

PRECAUTION HANDLING PRECAUTIONS FOR SRS AIRBAG SYSTEM Click here HANDLING PRECAUTIONS FOR STEERING COLUMN (a) When handling the electric power steering column sub-assembly: (1) Avoid any impact to the electric power steering column sub-assembly, especially to the motor or torque sensor. Replace t

 Interior Light Circuit

DESCRIPTION The main body ECU (multiplex network body ECU) controls the map light assembly and spot light assembly. WIRING DIAGRAM CAUTION / NOTICE / HINT NOTICE: Recognition code registration is necessary when replacing the main body ECU (multiplex network body ECU). If the main body ECU (mul

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