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Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> Accessories & Equipment >> Headlights >> Lighting System (W/ AFS) - Diagnostic Codes (1 Of 2) >> LIGHTING SYSTEM (w/ AFS) >> DTC B241A-1C: Rear Height Sensor Circuit Voltage Out of Range [11/2023 - ] >> Procedure

DTC B241A-1C: Rear Height Sensor Circuit Voltage Out of Range [11/2023 - ]: Procedure

  1. CLEAR DTC 
    1. Clear the DTCs.

      Body Electrical > Headlight Control > Clear DTCs 

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  2

  2. CHECK FOR DTC 
    1. Turn the ignition switch to ON.
    2. Wait 10 seconds or more.
    3. Check for DTCs.

      Body Electrical > Headlight Control > Trouble Codes 

      OK

      DTC B241A-1C is not output.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [12/2019 - ] 

    Result: 

    NG 

    See step  3

  3. INSPECT REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY LH 

    Refer to INSPECTION [12/2019 - ]

    Result

    Proceed to
    OK
    NG

    Result: 

    NG 

    REPLACE REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY LH. Refer to  REMOVAL [11/2023 - ] 

    Result: 

    OK 

    See step  4

  4. CHECK HARNESS AND CONNECTOR (REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY LH - HEADLIGHT ECU SUB-ASSEMBLY LH) 
    1. Disconnect the N6 rear height control sensor sub-assembly LH connector.
    2. Disconnect the A87 headlight ECU sub-assembly LH connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      N6-3 (SHB) - A87-16 (SBR) Always Below 1 Ω
      N6-2 (SHRR) - A87-17 (SHRL) Always Below 1 Ω
      N6-1 (SHG) - A87-15 (SGR) Always Below 1 Ω
      N6-3 (SHB) or A87-16 (SBR) - Body ground Always 10 kΩ or higher
      N6-2 (SHRR) or A87-17 (SHRL) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE HEADLIGHT ECU SUB-ASSEMBLY LH. Refer to  REMOVAL [11/2023 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR