Lexus NX: Height Control Sensor Data Out of Range When Initializing (B2452)
DESCRIPTION
The headlight ECU sub-assembly LH stores this DTC if the value from the rear height control sensor sub-assembly LH is out of range when performing initialization of the headlight ECU sub-assembly LH, such as when the vehicle is not level or jacked up.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| B2452 | Height Control Sensor Data Out of Range When Initializing |
|
|
WIRING DIAGRAM
.png)
CAUTION / NOTICE / HINT
NOTICE:
-
If the headlight ECU sub-assembly LH has been replaced, it is necessary to synchronize the vehicle information and initialize the headlight ECU sub-assembly LH.
Click here
.gif)
-
After the rear height control sensor sub-assembly LH is replaced or removed and installed, initialization is necessary.
Click here
PROCEDURE
| 1. | INITIALIZATION HEADLIGHT ECU SUB-ASSEMBLY LH |
(a) Perform initialization of the headlight ECU sub-assembly LH.
Click here
|
.gif)
| 2. | CHECK FOR DTC |
(a) Clear the DTCs.
Click here
(b) Turn the power switch on (IG).
(c) Check for DTCs.
Click here
OK:
DTC B2452 is not output.
| OK | .gif) | USE SIMULATION METHOD TO CHECK |
|
| 3. | CHECK REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY LH |
(a) Check the rear height control sensor sub-assembly LH installation condition.
OK:
Rear height control sensor sub-assembly LH installation condition is normal.
| NG | | INSTALL PARTS CORRECTLY |
|
| 4. | INSPECT REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY LH |
(a) Remove the rear height control sensor sub-assembly LH.
Click here
(b) Inspect the rear height control sensor sub-assembly LH.
Click here
| NG | | REPLACE REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY LH |
|
| 5. | CHECK HARNESS AND CONNECTOR (HEADLIGHT ECU SUB-ASSEMBLY LH - REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY LH) |
(a) Disconnect the A19 headlight ECU sub-assembly LH connector.
(b) Disconnect the R1 rear height control sensor sub-assembly LH connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| A19-16 (SBR) - R1-3 (SHB) | Always | Below 1 Ω |
| A19-17 (SHRL) - R1-2 (SHRR) | Always | Below 1 Ω |
| A19-15 (SGR) - R1-1 (SHG) | Always | Below 1 Ω |
| A19-16 (SBR) or R1-3 (SHB) - Body ground | Always | 10 kΩ or higher |
| A19-17 (SHRL) or R1-2 (SHRR) - Body ground | Always | 10 kΩ or higher |
| A19-15 (SGR) or R1-1 (SHG) - Body ground | Always | 10 kΩ or higher |
| OK | | REPLACE HEADLIGHT ECU SUB-ASSEMBLY LH |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
READ NEXT:
Automatic High Beam Main Switch
InspectionINSPECTION PROCEDURE 1. INSPECT COMBINATION SWITCH ASSEMBLY (AUTOMATIC HIGH BEAM MAIN SWITCH) (a) Remove the combination switch assembly. Click here (b) Inspect the automatic high beam ma
Precaution
PRECAUTION HANDLING PRECAUTIONS FOR FORWARD RECOGNITION CAMERA (a) The automatic high beam system uses the forward recognition camera. For precautions related to the forward recognition camera, refer
SEE MORE:
Lost Communication with Cruise Control Front Distance Range Sensor Single Sensor or Center Missing Message (U023587)
DESCRIPTION The forward recognition camera is connected to the millimeter wave radar sensor assembly via the CAN communication line. When the signal from the millimeter wave radar sensor assembly is interrupted, the forward recognition camera outputs U023587. DTC No. Detection Item DTC Detect
Additional Key cannot be Registered
DESCRIPTION If additional registration is not possible, a malfunction in the electrical key transmitter sub-assembly, certification ECU (smart key ECU assembly), power switch, No. 2 indoor electrical key antenna assembly (front floor), steering lock ECU (steering lock actuator assembly) or door cont
