DESCRIPTION
The No. 1 headlight ECU sub-assembly LH stores this DTC if the value from the rear height control sensor sub-assembly RH is out of range when performing initialization of the No. 1 headlight ECU sub-assembly LH, such as when the vehicle is not level or jacked up.
for Multiple Beam Headlight DTC No. | Detection Item | DTC Detection Condition | Trouble Area | DTC Output from |
---|---|---|---|---|
B2452 | Abnormal Height Sensor Data at Initialization |
|
| AFS |
DTC No. | Detection Item | DTC Detection Condition | Trouble Area | DTC Output from |
---|---|---|---|---|
B2452 | Abnormal Height Sensor Data at Initialization |
|
| HL AutoLeveling |
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Click here
Click here
Click here
PROCEDURE
1. | INITIALIZATION NO. 1 HEADLIGHT ECU SUB-ASSEMBLY LH |
(a) Perform initialization of the No. 1 headlight ECU sub-assembly LH.
Click here
|
2. | CONFIRM MODEL |
(a) Choose the model to be inspected.
Result | Proceed to |
---|---|
for Multiple Beam Headlight | A |
for Single Beam Headlight | B |
B | ![]() | GO TO STEP 5 |
|
3. | CLEAR DTC |
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / AFS / Trouble Codes.
(e) Clear the DTCs.
Body Electrical > AFS > Clear DTCs
|
4. | CHECK FOR DTC |
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / AFS / Trouble Codes.
(e) Check for DTCs.
Body Electrical > AFS > Trouble CodesOK:
DTC B2452 is not output.
OK | ![]() | END (INITIALIZATION WAS NOT COMPLETED) |
NG | ![]() | GO TO STEP 7 |
5. | CLEAR DTC |
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / HL AutoLeveling / Trouble Codes.
(e) Clear the DTCs.
Body Electrical > HL AutoLeveling > Clear DTCs
|
6. | CHECK FOR DTC |
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / HL AutoLeveling / Trouble Codes.
(e) Check for DTCs.
Body Electrical > HL AutoLeveling > Trouble CodesOK:
DTC B2452 is not output.
OK | ![]() | END (INITIALIZATION WAS NOT COMPLETED) |
|
7. | CHECK REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY RH |
(a) Check the installation condition of the rear height control sensor sub-assembly RH.
OK:
Rear height control sensor sub-assembly RH is installed correctly.
NG | ![]() | INSTALL PARTS CORRECTLY |
|
8. | INSPECT REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY RH |
(a) Remove the rear height control sensor sub-assembly RH.
Click here
(b) Inspect the rear height control sensor sub-assembly RH.
Click here
NG | ![]() | REPLACE REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY RH |
|
9. | CHECK HARNESS AND CONNECTOR (REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY RH - NO. 1 HEADLIGHT ECU SUB-ASSEMBLY LH) |
(a) Disconnect the A49 No. 1 headlight ECU sub-assembly LH connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection | Condition | Specified Condition |
---|---|---|
T3-3 (SHB) - A49-16 (SBR) | Always | Below 1 Ω |
T3-2 (SHRR) - A49-17 (SHRL) | Always | Below 1 Ω |
T3-1 (SHG) - A49-15 (SGR) | Always | Below 1 Ω |
T3-3 (SHB) or A49-16 (SBR) - Body ground | Always | 10 kΩ or higher |
T3-2 (SHRR) or A49-17 (SHRL) - Body ground | Always | 10 kΩ or higher |
OK | ![]() | REPLACE NO. 1 HEADLIGHT ECU SUB-ASSEMBLY LH |
NG | ![]() | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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INSTALLATION CAUTION / NOTICE / HINT HINT:
Use the same procedure for the RH side and LH side.
The following procedure is for the LH side.
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