RM35X0E _59 Vehicle Exterior _079256 LIGHTING (EXT) _0396321 LIGHTING SYSTEM(w/ Headlight ECU) C

LIGHTING (EXT)  LIGHTING SYSTEM(w/ Headlight ECU)  B2452  Abnormal Height Sensor Data at Initialization  


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 DTC Output from Note
B2452 Abnormal Height Sensor Data at Initialization
Detection condition:

The engine switch is on (IG)


Malfunction status:

Abnormal rear height control sensor sub-assembly LH value detected during initialization


Malfunction duration:

-


·

Vehicle condition when initializing

·

Rear height control sensor sub-assembly LH

·

Harness or connector

·

Headlight ECU sub-assembly LH


HL AutoLeveling -

WIRING DIAGRAM

E370854E36
4.198,2.302 6.521,2.708 2.323,0.406 10 false Headlight ECU Sub-assembly LH 4.208,2.177 4.5,2.427 0.292,0.25 10 false A54 2.854,1.51 3.146,1.76 0.292,0.25 10 false 1 2.844,0.99 3.135,1.24 0.292,0.25 10 false 2 2.833,0.479 3.125,0.729 0.292,0.25 10 false 3 4.958,0.302 5.25,0.552 0.292,0.25 10 false 5 V 2.406,0.573 2.74,0.823 0.333,0.25 10 false SHB 2.344,1.094 2.844,1.385 0.5,0.292 10 false SHRL 2.406,1.615 2.802,1.865 0.396,0.25 10 false SHG 0.813,2.135 1.104,2.385 0.292,0.25 10 false X7 0.823,2.302 3.76,2.531 2.938,0.229 10 false Rear Height Control Sensor Sub-assembly LH 4.094,1.5 4.385,1.75 0.292,0.25 10 false 15 4.344,1.521 4.729,1.771 0.385,0.25 10 false SGR 4.344,0.99 4.771,1.26 0.427,0.271 10 false SHRL 4.104,1 4.396,1.25 0.292,0.25 10 false 17 4.104,0.5 4.396,0.75 0.292,0.25 10 false 16 4.354,0.5 4.719,0.74 0.365,0.24 10 false SBR

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 hereVehicle Exterior>LIGHTING (EXT)>LIGHTING SYSTEM (w/ Headlight ECU)>INITIALIZATION

·

When replacing the headlight ECU sub-assembly LH, always replace it with a new one. If a headlight ECU sub-assembly LH which was installed to another vehicle is used, the information stored in it will not match the information from the vehicle and a DTC may be stored.

·

If any of the following are performed, it is necessary to initialize the headlight ECU sub-assembly LH.

Click hereVehicle Exterior>LIGHTING (EXT)>LIGHTING SYSTEM (w/ Headlight ECU)>INITIALIZATION

-

Replacement of the rear height control sensor sub-assembly LH

-

Removal/installation of the rear height control sensor sub-assembly LH

-

Work that changes the vehicle height such as replacement of suspension components




PROCEDURE

1.INITIALIZATION HEADLIGHT ECU SUB-ASSEMBLY LH
a.

Perform initialization of the headlight ECU sub-assembly LH.

Click hereVehicle Exterior>LIGHTING (EXT)>LIGHTING SYSTEM (w/ Headlight ECU)>INITIALIZATION


Result:
Proceed to
NEXT



NEXT

2.CLEAR DTC
2.CLEAR DTC
a.

Connect the GTS to the DLC3.


b.

Turn the engine switch on (IG).


c.

Turn the GTS on.


d.

Enter the following menus: Body Electrical / HL AutoLeveling / Clear DTCs.


e.

Clear the DTCs.

Body Electrical > HL AutoLeveling > Clear DTCs
50002 361

Result:
Proceed to
NEXT



NEXT

3.CHECK FOR DTC
3.CHECK FOR DTC
a.

Connect the GTS to the DLC3.


b.

Turn the engine switch on (IG).


c.

Turn the GTS on.


d.

Enter the following menus: Body Electrical / HL AutoLeveling / Trouble Codes.


e.

Check for DTCs.

Body Electrical > HL AutoLeveling > Trouble Codes
50001 361
OK:

DTC B2452 is not output.



Result:
Proceed to
OK
NG



OK

END (INITIALIZATION WAS NOT COMPLETED)

NG

4.CHECK REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY LH
4.CHECK REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY LH
a.

Check the installation condition of the rear height control sensor sub-assembly LH.

OK:

Rear height control sensor sub-assembly LH is installed correctly.



Result:
Proceed to
OK
NG



OK

5.INSPECT REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY LH

NG

INSTALL PARTS CORRECTLY

Click hereVehicle Exterior>LIGHTING (EXT)>HEIGHT CONTROL SENSOR>INSTALLATION


5.INSPECT REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY LH
a.

Remove the rear height control sensor sub-assembly LH.

Click hereVehicle Exterior>LIGHTING (EXT)>HEIGHT CONTROL SENSOR>REMOVAL


b.

Inspect the rear height control sensor sub-assembly LH.

Click hereVehicle Exterior>LIGHTING (EXT)>HEIGHT CONTROL SENSOR>INSPECTION


Result:
Proceed to
OK
NG



OK

6.CHECK HARNESS AND CONNECTOR (REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY LH - HEADLIGHT ECU SUB-ASSEMBLY LH)

NG

REPLACE REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY LH

Click hereVehicle Exterior>LIGHTING (EXT)>HEIGHT CONTROL SENSOR>REMOVAL


6.CHECK HARNESS AND CONNECTOR (REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY LH - HEADLIGHT ECU SUB-ASSEMBLY LH)
a.

Disconnect the X7 rear height control sensor sub-assembly LH connector.


b.

Disconnect the A54 headlight ECU sub-assembly LH connector.


c.

Measure the resistance according to the value(s) in the table below.

Standard Resistance:
Tester Connection Condition Specified Condition
X7-3 (SHB) - A54-16 (SBR) Always Below 1 Ω
X7-2 (SHRL) - A54-17 (SHRL) Always Below 1 Ω
X7-1 (SHG) - A54-15 (SGR) Always Below 1 Ω
X7-3 (SHB) or A54-16 (SBR) - Body ground Always 10 kΩ or higher
X7-2 (SHRL) or A54-17 (SHRL) - Body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

REPLACE HEADLIGHT ECU SUB-ASSEMBLY LH

Click hereVehicle Exterior>LIGHTING (EXT)>HEADLIGHT ECU>REMOVAL


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR