Lexus NX: Left Headlight ECU Variation Error (B2456)
DESCRIPTION
This DTC is output when a headlight ECU sub-assembly LH that is incompatible with the vehicle is installed.
The headlight ECU sub-assembly LH outputs DTC B2456.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| B2456 | Left Headlight ECU Variation Error | Headlight ECU sub-assembly LH variation mismatch |
|
PROCEDURE
| 1. | CHECK FOR DTC |
(a) Clear the DTCs.
Click here .gif)
(b) Turn the power switch on (IG).
(c) Check for DTCs.
Click here
OK:
DTC B2456 output does not occur.
| OK | .gif) | USE SIMULATION METHOD TO CHECK |
|
.gif)
| 2. | CHECK HYBRID VEHICLE CONTROL ECU |
(a) Check that the hybrid vehicle control ECU part number matches the vehicle.
| Result | Proceed to |
|---|---|
| Hybrid vehicle control ECU part number matches vehicle | A |
| Hybrid vehicle control ECU part number does not match | B |
| A | | REPLACE HEADLIGHT ECU SUB-ASSEMBLY LH |
| B | | REPLACE HYBRID VEHICLE CONTROL ECU |
READ NEXT:
Control Module Communication Bus "A" Off (U0073,U0100,U0101,U0126,U0129,U0142,U0155,U0293)
DESCRIPTION DTC No. Detection Item DTC Detection Condition Trouble Area U0073 Control Module Communication Bus "A" Off Bus off condition is detected. CAN communication system U0
Lost Communication with Multi-axis Acceleration Sensor Module Missing Message (U012587,U012987,U014087,U029387)
DESCRIPTION DTC No. Detection Item DTC Detection Condition Trouble Area DTC Output from U012587 Lost Communication with Multi-axis Acceleration Sensor Module Missing Message Communi
Lost Communication with Cruise Control Front Distance Range Sensor Missing Message (U023587,U0242)
DESCRIPTION DTC No. Detection Item DTC Detection Condition Trouble Area DTC Output from Note U023587 Lost Communication with Cruise Control Front Distance Range Sensor Missing Messa
SEE MORE:
Parts Location
PARTS LOCATION ILLUSTRATION *1 FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY LH *2 SHIFT LEVER POSITION SENSOR *3 SIDE TURN SIGNAL LIGHT ASSEMBLY LH *4 SIDE TURN SIGNAL LIGHT ASSEMBLY RH *5 OUTER REAR VIEW MIRROR ASSEMBLY LH *6 OUTER REAR VIEW MIRROR ASSEMBLY RH *7 HE
Headlight ECU Communication Stop Mode
DESCRIPTION Detection Item Symptom Trouble Area Headlight ECU Communication Stop Mode Any of the following conditions are met:
Communication stop for "Headlight swivel (AFS)" is indicated on the "Communication Bus Check" screen of the Techstream.
Click here
Communication system
