DTC B2452: Abnormal Height Sensor Data at Initialization [07/2019 - 10/2019]: Procedure

1. Perform initialization of the headlight ECU sub-assembly LH.

   Refer to INITIALIZATION [06/2018 - 08/2020]

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  2

1. Connect the Techstream to the DLC3.
2. Turn the power 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  3

1. Connect the Techstream to the DLC3.
2. Turn the power 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  4

1. 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

Result: 

NG 

INSTALL PARTS CORRECTLY. Refer to  INSTALLATION [06/2018 - 08/2020] 

Result: 

OK 

See step  5

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

   Refer to REMOVAL [06/2018 - 08/2020]

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

   Refer to INSPECTION [06/2018 - 08/2020]

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY LH. Refer to  REMOVAL [06/2018 - 08/2020] 

Result: 

OK 

See step  6

1. For TMMK Made Before Sep. 2019 Production
   1. Disconnect the A11 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
      O3-3 (SHB) - A11-16 (SBR)	Always	Below 1 Ω
      O3-2 (SHRR) - A11-17 (SHRL)	Always	Below 1 Ω
      O3-1 (SHG) - A11-15 (SGR)	Always	Below 1 Ω
      O3-3 (SHB) or A11-16 (SBR) - Body ground	Always	10 kΩ or higher
      O3-2 (SHRR) or A11-17 (SHRL) - Body ground	Always	10 kΩ or higher

2. For TMC Made or TMMK Made From Sep. 2019 Production
   1. Disconnect the A78 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
      O3-3 (SHB) - A78-16 (SBR)	Always	Below 1 Ω
      O3-2 (SHRR) - A78-17 (SHRL)	Always	Below 1 Ω
      O3-1 (SHG) - A78-15 (SGR)	Always	Below 1 Ω
      O3-3 (SHB) or A78-16 (SBR) - Body ground	Always	10 kΩ or higher
      O3-2 (SHRR) or A78-17 (SHRL) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE HEADLIGHT ECU SUB-ASSEMBLY LH. Refer to  REMOVAL [06/2018 - 09/2022] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR