DTC B2452: Abnormal Height Sensor Data at Initialization [08/2019 - ]: Procedure

1. Perform initialization of the No. 1 headlight ECU sub-assembly LH.

   Refer to INITIALIZATION [08/2019 - 07/2020] , or refer to INITIALIZATION [07/2020 - ]

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  2

1. Choose the model to be inspected.

   Result

   Result	Proceed to
   for Multiple Beam Headlight	A
   for Single Beam Headlight	B

Result: 

B 

See step  5

Result: 

A 

See step  3

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / AFS / Trouble Codes.
5. Clear the DTCs.

   Body Electrical > AFS > Clear DTCs 

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  4

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / AFS / Trouble Codes.
5. Check for DTCs.

   Body Electrical > AFS > Trouble Codes 

   OK

   DTC B2452 is not output.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

END (INITIALIZATION WAS NOT COMPLETED) 

Result: 

NG 

See step  7

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / HL Auto Leveling / Trouble Codes.
5. Clear the DTCs.

   Body Electrical > HL Auto Leveling > Clear DTCs 

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  6

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / HL Auto Leveling / Trouble Codes.
5. Check for DTCs.

   Body Electrical > HL Auto Leveling > Trouble Codes 

   OK

   DTC B2452 is not output.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

END (INITIALIZATION WAS NOT COMPLETED) 

Result: 

NG 

See step  7

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

   OK

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

   Result

   Proceed to
   OK
   NG

Result: 

NG 

INSTALL PARTS CORRECTLY. Refer to  INSTALLATION [08/2019 - ] 

Result: 

OK 

See step  8

1. Remove the rear height control sensor sub-assembly RH.

   Refer to REMOVAL [08/2019 - ]

2. Inspect the rear height control sensor sub-assembly RH.

   Refer to INSPECTION [09/2015 - ]

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY RH. Refer to  REMOVAL [08/2019 - ] 

Result: 

OK 

See step  9

1. Disconnect the A49 No. 1 headlight ECU sub-assembly LH connector.
2. 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

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE NO. 1 HEADLIGHT ECU SUB-ASSEMBLY LH. Refer to  REMOVAL [08/2019 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR