Lexus NX: 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 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 Lighting System (for Triple Beam Headlight) DTC No. Detection Item Link B1244 Light Sensor Circuit Malfunction B2414 Steering Position Sensor Malf
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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DESCRIPTION If the manual up and down function operates normally but the auto up and down function does not, then fail-safe mode may be functioning. If power window initialization has not been performed, the auto up and down function will not operate. Click here WIRING DIAGRAM CAUTION / NOTICE /
DESCRIPTION The hybrid vehicle control ECU monitors its internal operation and will store the DTC when it detects an internal malfunction. DTC No. Detection Item DTC Detection Condition Trouble Area MIL Warning Indicate P062F-489 Internal Control Module EEPROM Error ECU internal
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