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
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CAUTION / NOTICE / HINT
NOTICE:
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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
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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
|
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| 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 |
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Removal
REMOVAL CAUTION / NOTICE / HINT HINT:
Use the same procedure for the RH and LH sides.
The following procedure is for the LH side.
NOTICE:
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Back door
The back door can be opened using
the back door open switch, smart
access system with push-button
start or wireless remote control.
WARNING
■Caution while driving
Keep the back door closed while driving.
If the back door is left open, it may hit
nearby objects while driving or lugga
