- Open in output side circuit
- Short between output terminal and body ground
- Short between output terminals (Hi and Lo)
Lexus NX: Fail-safe Chart
Lexus NX Service Manual / Vehicle Exterior / Lighting (ext) / Lighting System (for Single Beam Headlight) / 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 | | 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.
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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
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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
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