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Home >> Lexus >> 2019 >> LS 500 Base, RWD >> Repair and Diagnosis (Single Page) >> Suspension >> Suspension Control Systems >> Adaptive Variable Suspension System - Diagnostic Codes (1 Of 2) >> Adaptive Variable Suspension System >> DTC C1711: Front Height Control Sensor RH Circuit Malfunction; DTC C1712: Front Height Control Sensor LH Circuit Malfunction; DTC C1713: Rear Height Control Sensor RH Circuit Malfunction; DTC C1714: Rear Height Control Sensor LH Circuit Malfunction [12/2017 - 10/2023] >> Procedure
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DTC C1711: Front Height Control Sensor RH Circuit Malfunction; DTC C1712: Front Height Control Sensor LH Circuit Malfunction; DTC C1713: Rear Height Control Sensor RH Circuit Malfunction; DTC C1714: Rear Height Control Sensor LH Circuit Malfunction [12/2017 - 10/2023]: Procedure

  1. CHECK SUSPENSION TYPE 
    1. Check the suspension type.

      Result

      Result Proceed to
      w/o Air Suspension A
      w/ Air Suspension B

    Result: 

    B 

    See step  7

    Result: 

    A 

    See step  2

  2. CHECK HEIGHT CONTROL SENSOR SUB-ASSEMBLY INSTALLATION CONDITION 
    1. Check the height control sensor sub-assembly installation condition and make sure that there are no loose installation bolts and foreign matter trapped between the sensor and body.

      OK

      Installed correctly.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    INSTALL HEIGHT CONTROL SENSOR SUB-ASSEMBLY CORRECTLY 

    for Front Side : Refer to INSTALLATION [12/2017 - ]

    for Rear Side : Refer to INSTALLATION [12/2017 - ]

    Result: 

    OK 

    See step  3

  3. INSPECT HEIGHT CONTROL SENSOR SUB-ASSEMBLY (FRONT OR REAR) 
    1. for Front Side.
      1. Inspect the front height control sensor sub-assembly RH or front height control sensor sub-assembly LH.

        Refer to INSPECTION [12/2017 - ]

    2. for Rear Side.
      1. Inspect the rear height control sensor sub-assembly RH or rear height control sensor sub-assembly LH.

        Refer to INSPECTION [12/2017 - ]

      Result

      Result Proceed to
      OK (for Front Side) A
      OK (for Rear Side) B
      Front height control sensor sub-assembly RH malfunction C
      Front height control sensor sub-assembly LH malfunction D
      Rear height control sensor sub-assembly RH malfunction E
      Rear height control sensor sub-assembly LH malfunction F

    Result: 

    B 

    See step  5

    Result: 

    C 

    REPLACE FRONT HEIGHT CONTROL SENSOR SUB-ASSEMBLY RH. Refer to  REMOVAL [12/2017 - ] 

    Result: 

    D 

    REPLACE FRONT HEIGHT CONTROL SENSOR SUB-ASSEMBLY LH. Refer to  REMOVAL [12/2017 - ] 

    Result: 

    E 

    REPLACE REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY RH. Refer to  REMOVAL [12/2017 - ] 

    Result: 

    F 

    REPLACE REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY LH. Refer to  REMOVAL [12/2017 - ] 

    Result: 

    A 

    See step  4

  4. CHECK HARNESS AND CONNECTOR (FRONT HEIGHT CONTROL SENSOR SUB-ASSEMBLY - ABSORBER CONTROL ECU) 
    1. Check the front height control sensor sub-assembly RH harness and connector.
      1. Turn the engine switch off.
      2. Disconnect the A69*1 or A75*2 front height control sensor sub-assembly RH connector.
        1. *1: for AWD
        2. *2: for 2WD
      3. Disconnect the L46 absorber control ECU connector.
      4. Measure the resistance according to the value(s) in the table below.

        Standard Resistance

        FOR AWD:

        Tester Connection Condition Specified Condition
        A69-1 (SHG) - L46-11 (SHG1) Always Below 1 Ω
        A69-2 (SHFR) - L46-12 (SHFR)
        A69-3 (SHB) - L46-10 (SHB1)
        A69-1 (SHG) or L46-11 (SHG1) - Body ground Always 10 kΩ or higher
        A69-2 (SHFR) or L46-12 (SHFR) - Body ground
        A69-3 (SHB) or L46-10 (SHB1) - Body ground
        FOR 2WD:

        Tester Connection Condition Specified Condition
        A75-1 (SHG) - L46-11 (SHG1) Always Below 1 Ω
        A75-2 (SHFR) - L46-12 (SHFR)
        A75-3 (SHB) - L46-10 (SHB1)
        A75-1 (SHG) or L46-11 (SHG1) - Body ground Always 10 kΩ or higher
        A75-2 (SHFR) or L46-12 (SHFR) - Body ground
        A75-3 (SHB) or L46-10 (SHB1) - Body ground
    2. Check the front height control sensor sub-assembly LH harness and connector.
      1. Turn the engine switch off.
      2. Disconnect the A68*1 or A74*2 front height control sensor sub-assembly LH connector.
        1. *1: for AWD
        2. *2: for 2WD
      3. Disconnect the L46 absorber control ECU connector.
      4. Measure the resistance according to the value(s) in the table below.

        Standard Resistance

        FOR AWD:

        Tester Connection Condition Specified Condition
        A68-1 (SHG) - L46-21 (SHG2) Always Below 1 Ω
        A68-2 (SHFL) - L46-20 (SHFL)
        A68-3 (SHB) - L46-9 (SHB2)
        A68-1 (SHG) or L46-21 (SHG2) - Body ground Always 10 kΩ or higher
        A68-2 (SHFL) or L46-20 (SHFL) - Body ground
        A68-3 (SHB) or L46-9 (SHB2) - Body ground
        FOR 2WD:

        Tester Connection Condition Specified Condition
        A74-1 (SHG) - L46-21 (SHG2) Always Below 1 Ω
        A74-2 (SHFL) - L46-20 (SHFL)
        A74-3 (SHB) - L46-9 (SHB2)
        A74-1 (SHG) or L46-21 (SHG2) - Body ground Always 10 kΩ or higher
        A74-2 (SHFL) or L46-20 (SHFL) - Body ground
        A74-3 (SHB) or L46-9 (SHB2) - Body ground

      Result

      Result
      OK
      NG

    Result: 

    OK 

    REPLACE ABSORBER CONTROL ECU. Refer to  REMOVAL [12/2017 - 09/2018]  , or refer to  REMOVAL [09/2018 - 10/2020]  , or refer to  REMOVAL [10/2020 - 10/2022]  , or refer to  REMOVAL [10/2022 - 10/2023] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS AND CONNECTOR 

  5. CHECK HARNESS AND CONNECTOR (REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY - ABSORBER CONTROL ECU) 
    1. Check the rear height control sensor sub-assembly RH harness and connector.
      1. Turn the engine switch off.
      2. Disconnect the L30 absorber control ECU connector.
      3. Disconnect the z26 skid control sensor wire RH connector.
      4. Measure the resistance according to the value(s) in the table below.

        Standard Resistance

        Tester Connection Condition Specified Condition
        z26-1 (SHG) - L30-10 (SHG3) Always Below 1 Ω
        z26-2 (SHRR) - L30-11 (SHRR)
        z26-3 (SHB) - L30-12 (SHB3)
        z26-1 (SHG) or L30-10 (SHG3) - Body ground Always 10 kΩ or higher
        z26-2 (SHRR) or L30-11 (SHRR) - Body ground
        z26-3 (SHB) or L30-12 (SHB3) - Body ground
    2. Check the rear height control sensor sub-assembly LH harness and connector.
      1. Turn the engine switch off.
      2. Disconnect the L30 absorber control ECU connector.
      3. Disconnect the L179 skid control sensor wire LH connector.
      4. Measure the resistance according to the value(s) in the table below.

        Standard Resistance

        Tester Connection Condition Specified Condition
        L179-1 (SHG) - L30-22 (SHG4) Always Below 1 Ω
        L179-2 (SHRL) - L30-21 (SHRL)
        L179-3 (SHB) - L30-13 (SHB4)
        L179-1 (SHG) or L30-22 (SHG4) - Body ground Always 10 kΩ or higher
        L179-2 (SHRL) or L30-21 (SHRL) - Body ground
        L179-3 (SHB) or L30-13 (SHB4) - Body ground

      Result

      Result
      OK
      NG

    Result: 

    OK 

    REPLACE ABSORBER CONTROL ECU. Refer to  REMOVAL [12/2017 - 09/2018]  , or refer to  REMOVAL [09/2018 - 10/2020]  , or refer to  REMOVAL [10/2020 - 10/2022]  , or refer to  REMOVAL [10/2022 - 10/2023] 

    Result: 

    NG 

    See step  6

  6. INSPECT SKID CONTROL SENSOR WIRE 
    1. Turn the engine switch off.
    2. Disconnect the L175 or A skid control sensor wire connector.
    3. Measure the resistance according to the value(s) in the table below.
      GTY809841Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *A for RH *B for LH
      *1 Skid Control Sensor Wire - -
      *a Front view of wire harness connector
      (to Rear Height Control Sensor Sub-assembly Side Connector)      		 *b Front view of wire harness connector
      (to Vehicle Side Connector)

      Standard Resistance

      FOR RH

      Tester Connection Condition Specified Condition
      L175 -1 (SHRR) - z26 -2 (SHRR) Always Below 1 Ω
      L175 -2 (SHB) - z26 -3 (SHB)
      L175 -5 (SHG) - z26 -1 (SHG)
      L175 -1 (SHRR) or z26 -2 (SHRR) - Body ground and other terminals Always 10 kΩ or higher
      L175 -2 (SHB) or z26 -3 (SHB) - Body ground and other terminals
      L175 -5 (SHG) or z26 -1 (SHG) - Body ground and other terminals

      Standard Resistance

      FOR LH

      Tester Connection Condition Specified Condition
      A -1 - L179 -2 (SHRL) Always Below 1 Ω
      A -2 - L179 -3 (SHB)
      A-5 - L179 -1 (SHG)
      A -1 or L179 -2 (SHRL) - Body ground and other terminals Always 10 kΩ or higher
      A -2 or L179 -3 (SHB) - Body ground and other terminals
      A -5 or L179 -1 (SHG) - Body ground and other terminals

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPAIR OR REPLACE HARNESS AND CONNECTOR 

    Result: 

    NG 

    REPLACE SKID CONTROL SENSOR WIRE. Refer to  REMOVAL [12/2017 - ] 

  7. CHECK FOR DTCS 
    1. Check for DTCs.

      Refer to DTC CHECK / CLEAR [12/2017 - ]

      Chassis > Air suspension > Trouble Codes 

      Result

      Result Proceed to
      Air suspension system DTCs are not output A
      Air suspension system DTCs are output B

    Result: 

    B 

    GO TO AIR SUSPENSION SYSTEM. Refer to  DIAGNOSTIC TROUBLE CODE CHART [12/2017 - 10/2023] 

    Result: 

    A 

    See step  8

  8. CHECK HEIGHT CONTROL SENSOR SUB-ASSEMBLY INSTALLATION CONDITION 
    1. Check the height control sensor sub-assembly installation condition and make sure that there are no loose installation bolts and foreign matter trapped between the sensor and body.

      OK

      Installed correctly.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    INSTALL HEIGHT CONTROL SENSOR SUB-ASSEMBLY CORRECTLY 

    for Front Side : Refer to INSTALLATION [12/2017 - ]

    for Rear Side : Refer to INSTALLATION [12/2017 - ]

    Result: 

    OK 

    See step  9

  9. INSPECT HEIGHT CONTROL SENSOR SUB-ASSEMBLY (FRONT OR REAR) 
    1. for Front Side.
      1. Inspect the front height control sensor sub-assembly RH or front height control sensor sub-assembly LH.

        Refer to INSPECTION [12/2017 - ]

    2. for Rear Side.
      1. Inspect the rear height control sensor sub-assembly RH or rear height control sensor sub-assembly LH.

        Refer to INSPECTION [12/2017 - ]

      Result

      Result Proceed to
      OK A
      Front height control sensor sub-assembly RH malfunction B
      Front height control sensor sub-assembly LH malfunction C
      Rear height control sensor sub-assembly RH malfunction D
      Rear height control sensor sub-assembly LH malfunction E

    Result: 

    B 

    REPLACE FRONT HEIGHT CONTROL SENSOR SUB-ASSEMBLY RH. Refer to  REMOVAL [12/2017 - ] 

    Result: 

    C 

    REPLACE FRONT HEIGHT CONTROL SENSOR SUB-ASSEMBLY LH. Refer to  REMOVAL [12/2017 - ] 

    Result: 

    D 

    REPLACE REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY RH. Refer to  REMOVAL [12/2017 - ] 

    Result: 

    E 

    REPLACE REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY LH. Refer to  REMOVAL [12/2017 - ] 

    Result: 

    A 

    See step  10

  10. CHECK HARNESS AND CONNECTOR (HEIGHT CONTROL SENSOR SUB-ASSEMBLY OUTPUT VOLTAGE) 
    1. Turn the engine switch off.
    2. Disconnect the L30 or L46 absorber control ECU connector.
    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      FRONT HEIGHT CONTROL SENSOR SUB-ASSEMBLY RH:

      Tester Connection Condition Specified Condition
      L46-12 (SHFR) - Body ground Engine switch on (IG) Approximately 0.3 to 4.7 V
      FRONT HEIGHT CONTROL SENSOR SUB-ASSEMBLY LH:

      Tester Connection Condition Specified Condition
      L46-20 (SHFL) - Body ground Engine switch on (IG) Approximately 0.3 to 4.7 V
      REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY RH:

      Tester Connection Condition Specified Condition
      L30-11 (SHRR) - Body ground Engine switch on (IG) Approximately 0.3 to 4.7 V
      REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY LH:

      Tester Connection Condition Specified Condition
      L30-21 (SHRL) - Body ground Engine switch on (IG) Approximately 0.3 to 4.7 V

      Result

      Result
      OK
      NG (for Front)
      NG (for Rear)

    Result: 

    OK 

    REPLACE ABSORBER CONTROL ECU. Refer to  REMOVAL [12/2017 - 09/2018]  , or refer to  REMOVAL [09/2018 - 10/2020]  , or refer to  REMOVAL [10/2020 - 10/2022]  , or refer to  REMOVAL [10/2022 - 10/2023] 

    Result: 

    NG (for Front) 

    REPAIR OR REPLACE HARNESS AND CONNECTOR 

    Result: 

    NG (for Rear) 

    See step  11

  11. INSPECT SKID CONTROL SENSOR WIRE 
    1. Turn the engine switch off.
    2. Disconnect the L175 or A skid control sensor wire connector.
    3. Disconnect the z26 or L179 skid control sensor wire connector.
    4. Measure the resistance according to the value(s) in the table below.
      GTY834874Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *A for RH *B for LH
      *1 Skid Control Sensor Wire - -
      *a Front view of wire harness connector
      (to Rear Height Control Sensor Sub-assembly Side Connector)      		 *b Front view of wire harness connector
      (to Vehicle Side Connector)

      Standard Resistance

      FOR RH

      Tester Connection Condition Specified Condition
      L175 -1 (SHRR) - z26 -2 (SHRR) Always Below 1 Ω
      L175 -1 (SHRR) or z26 -2 (SHRR) - Body ground and other terminals Always 10 kΩ or higher

      Standard Resistance

      FOR LH

      Tester Connection Condition Specified Condition
      A -1 - L179 -2 (SHRL) Always Below 1 Ω
      A -1 or L179 -2 (SHRL) - Body ground and other terminals Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPAIR OR REPLACE HARNESS AND CONNECTOR 

    Result: 

    NG 

    REPLACE SKID CONTROL SENSOR WIRE. Refer to  REMOVAL [12/2017 - ] 

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