Lexus NX: Fail-safe Chart
Lexus NX Service Manual / Vehicle Exterior / Lighting (ext) / Lighting System (for Triple Beam Headlight) / Fail-safe Chart
FAIL-SAFE CHART
FAIL-SAFE FUNCTION
(a) Headlight ECU sub-assembly
(1) The headlight ECU sub-assembly stops light operation if the following malfunctions are detected.
| Malfunction | Multi-information Display Warning | DTC Output | ||
|---|---|---|---|---|
| Lighting on/off | LED light source malfunction | Low beam | Displayed | Output |
| High beam | Not Displayed | Output | ||
| Fan malfunction | Displayed | Output | ||
| Other than above (communication with main body ECU (multiplex network body ECU)) | Displayed | Output | ||
| Automatic headlight beam level control system | Displayed | Output | ||
| AFS (adaptive front-lighting system) | Displayed | Output | ||
| Power supply | IG voltage line malfunction | Displayed | Output | |
| Other than an IG voltage line malfunction | Not displayed | Not output | ||
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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
Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART Lighting System (for Triple Beam Headlight) DTC No. Detection Item Link B1244 Light Sensor Circuit Malfunction B2414 Steering Position Sensor Malf
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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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ECU Power Source Circuit
DESCRIPTION This circuit is the power source circuit to operate the parking assist ECU. The parking assist ECU controls the panoramic view monitor system. WIRING DIAGRAM CAUTION / NOTICE / HINT NOTICE: Inspect the fuse for circuits related to this system before performing the following procedure.
Inspection
INSPECTION PROCEDURE 1. INSPECT POWER WINDOW REGULATOR MOTOR ASSEMBLY LH NOTICE:
Do not apply voltage to any terminals except terminals 1 and 2 to avoid damaging the pulse sensor inside the motor.
Reset the power window regulator motor (initialize the pulse sensor) after installing the power wi
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