Lexus NX: Fail-safe Chart

FAIL-SAFE CHART

LED HEADLIGHT SYSTEM

The headlight assembly (light control LED ECU) operates in fail-safe mode if any of the following abnormalities are detected.

Item

Abnormality Detection Condition

Return Condition

Multi-information Display

Abnormal input voltage

(High input voltage)

Abnormal power source voltage (more than 17 V) is detected.

Normal power source voltage (10 to 16 V) is detected.

"Headlight System Malfunction Visit Your Dealer" is displayed

Abnormal input voltage

(Low input voltage)*

Power source voltage is low (8.5 to 10 V) and LED output current is limited. (Headlights will remain illuminated.)

Normal power source voltage (10 to 16 V) is detected.

"Headlight System Malfunction Visit Your Dealer" is displayed

Power source voltage is low (below 6 V). (Headlight operation is stopped)

Power source voltage of 8.5 V or more is detected

Abnormal output

  • Open in output side circuit
  • Short between output terminal and body ground
  • Short between output terminals (Hi and Lo)

Light control switch is turned from off to head position.

"Headlight System Malfunction Visit Your Dealer" is displayed

  • *: When the headlights are on and the input voltage is between 6 and 10 V, the headlights dim.

READ NEXT:

 Data List / Active Test

DATA LIST / ACTIVE TEST 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 part is faul

 Diagnostic Trouble Code Chart

DIAGNOSTIC TROUBLE CODE CHART Lighting System DTC No. Detection Item Link B1244 Light Sensor Circuit Malfunction B2430 LED Headlight LH Circuit Malfunction B2431 LED

 Vehicle Control History

VEHICLE CONTROL HISTORY CHECK THE VEHICLE CONTROL HISTORY (LIGHTING SYSTEM) HINT: The vehicle control history data (lighting system) stores the history of the reject function and system protection

SEE MORE:

 System Diagram

SYSTEM DIAGRAM Communication Table Transmitter Receiver Signal Communication Method Multi-display Assembly Radio Receiver Assembly Windshield deicer switch signal GVIF Radio Receiver Assembly Air Conditioning Amplifier Assembly Windshield deicer switch signal CAN

 Disassembly

DISASSEMBLY CAUTION / NOTICE / HINT NOTICE: Do not allow any dirt (fingerprints, grease, etc.) to adhere to the meter glass. If the glass is dirty, wipe it clean with a soft cloth. PROCEDURE 1. REMOVE COMBINATION METER GLASS (a) Using a screwdriver, detach the 8 claws and remove the combination m

© 2016-2025 Copyright www.lexunx.com