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
PROCEDURE
(a) Clear the DTCs.
Click here
Body Electrical > AFS > Clear DTCs
(b) Turn the power switch on (IG).
(c) Check for DTCs.
Click here
Body Electrical > AFS > Trouble Codes
Result | Proceed to |
DTCs B242C and B242D are not output | A |
DTC B242C is output | B |
DTC B242D is output | C |
B | | REPLACE HEADLIGHT ECU SUB-ASSEMBLY RH |
C | | REPLACE HEADLIGHT ECU SUB-ASSEMBLY LH |
READ NEXT:
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
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
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
SEE MORE:
CHECKING MONITOR STATUS The purpose of the monitor result (mode 06) is to allow access to the results of on-board diagnostic monitoring tests of specific components/systems that are not continuously monitored. Examples are catalysts and evaporative emissions (EVAP) systems. The monitor result allows
DESCRIPTION The skid control ECU (brake booster with master cylinder assembly) stores and corrects the individual differences in the brake pedal stroke sensor assembly, actuator solenoids, and stroke simulator solenoid. Perform initialization and calibration of the linear solenoid valve if any of th
© 2016-2025 Copyright www.lexunx.com
