Lexus NX: Right Headlight ECU Malfunction (B242C,B242D)
DESCRIPTION
These DTCs are output when an internal malfunction in the headlight ECU sub-assembly occurs.
The headlight ECU sub-assembly LH outputs DTC B242C and B242D.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| B242C | Right Headlight ECU Malfunction | Headlight ECU sub-assembly RH malfunction | Headlight ECU sub-assembly RH |
| B242D | Left Headlight ECU Malfunction | Headlight ECU sub-assembly LH malfunction | Headlight ECU sub-assembly LH |
CAUTION / NOTICE / HINT
NOTICE:
After the headlight ECU sub-assembly LH is replaced, vehicle information registration and initialization are necessary.
Click here .gif)
PROCEDURE
| 1. | CHECK FOR DTC |
(a) Clear the DTCs.
Click here
(b) Turn the power switch on (IG).
(c) Check for DTCs.
Click here
| Result | Proceed to |
|---|---|
| DTCs B242C and B242D are not output | A |
| DTC B242C is output | B |
| DTC B242D is output | C |
| A | .gif) | USE SIMULATION METHOD TO CHECK |
| B | | REPLACE HEADLIGHT ECU SUB-ASSEMBLY RH |
| C | | REPLACE HEADLIGHT ECU SUB-ASSEMBLY LH |
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Open in IG Circuit (B242E)
DESCRIPTION This DTC is output when there is a problem in the power supply for the headlight ECU sub-assembly RH. The headlight ECU sub-assembly LH outputs DTC B242E. DTC No. Detection Item DTC
Headlamp LH Circuit (B2439,B243A)
DESCRIPTION This DTC is output when the headlight ECU sub-assembly receives an abnormal signal from the headlight unit. The headlight ECU sub-assembly LH outputs DTC B2439 and B243A DTC No. Detec
Left Low Beam Fan Malfunction (B243D,B243E)
DESCRIPTION This DTC is output when the low beam fan is malfunctioning and the low beam illumination is dark. The headlight ECU sub-assembly LH outputs DTC B243D and B243E DTC No. Detection Item
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steering control)
When driving on highways and
freeways with white (yellow) lane
lines, this function alerts the driver
when the vehicle might depart from
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assistance by operating the steering
wheel to keep the vehicle in its
lane or course*.
The LDA system recognizes white
Engine Hood Courtesy Switch Circuit
DESCRIPTION The engine hood courtesy switch is installed together with the hood lock. This switch turns on when the engine hood is closed and turns off when the engine hood is opened. WIRING DIAGRAM CAUTION / NOTICE / HINT NOTICE: If the main body ECU (multiplex network body ECU) is replaced, refer
