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AIR SUSPENSION SYSTEM, Diagnostic DTC:C171114, C171214, C171314, C171414

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DTC Code DTC Name
C171114 Front Height Control Sensor RH Circuit Circuit Short to Ground or Open
C171214 Front Height Control Sensor LH Circuit Circuit Short to Ground or Open
C171314 Rear Height Control Sensor RH Circuit Circuit Short to Ground or Open
C171414 Rear Height Control Sensor LH Circuit Circuit Short to Ground or Open
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DESCRIPTION

The height control sensor sub-assembly changes the resistance according to the change in vehicle height. The suspension control ECU outputs a fixed voltage of 5 V to the height control sensor sub-assembly SHB terminal. If the sensor's resistance value changes, the sensor's voltage changes accordingly. The suspension control ECU then inputs the voltage value from the sensor to detect the vehicle height change.

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Memory
C171114 Front Height Control Sensor RH Circuit Circuit Short to Ground or Open

  • The power source voltage of the front height control sensor sub-assembly RH is 4.3 V or less continuously for 1 second.

  • The output voltage of the front height control sensor sub-assembly RH is 0.3 V or less continuously for 1 second.

  • Front height control sensor sub-assembly RH

  • Wire harness or connector

  • Suspension control ECU

  • Absorber control ECU

 Comes on Yes
C171214 Front Height Control Sensor LH Circuit Circuit Short to Ground or Open

  • The power source voltage of the front height control sensor sub-assembly LH is 4.3 V or less continuously for 1 second.

  • The output voltage of the front height control sensor sub-assembly LH is 0.3 V or less continuously for 1 second.

  • Front height control sensor sub-assembly LH

  • Wire harness or connector

  • Suspension control ECU

  • Absorber control ECU

 Comes on Yes
C171314 Rear Height Control Sensor RH Circuit Circuit Short to Ground or Open

  • The power source voltage of the rear height control sensor sub-assembly RH is 4.3 V or less continuously for 1 second.

  • The output voltage of the rear height control sensor sub-assembly RH is 0.3 V or less continuously for 1 second.

  • Rear height control sensor sub-assembly RH

  • Wire harness or connector

  • Suspension control ECU

  • Absorber control ECU

 Comes on Yes
C171414 Rear Height Control Sensor LH Circuit Circuit Short to Ground or Open

  • The power source voltage of the rear height control sensor sub-assembly LH is 4.3 V or less continuously for 1 second.

  • The output voltage of the rear height control sensor sub-assembly LH is 0.3 V or less continuously for 1 second.

  • Rear height control sensor sub-assembly LH

  • Wire harness or connector

  • Suspension control ECU

  • Absorber control ECU

 Comes on Yes
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WIRING DIAGRAM

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CAUTION / NOTICE / HINT

Note:

  • Before performing troubleshooting, inspect the connectors of related circuits.

  • After replacing the suspension control ECU or height control sensor sub-assembly with a new one, perform vehicle height offset.

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PROCEDURE


  1. Click here

    CHECK FOR DTCS (ADAPTIVE VARIABLE SUSPENSION SYSTEM)


    1. Check for DTCs.

      Click here


      1. Chassis > Adaptive Variable Suspension System > Trouble Codes


      Tip:

      If there is a malfunction in the height control sensor, adaptive variable suspension system DTCs may be detected. Check the adaptive variable suspension system first.

      Result
      Result Proceed to
      Adaptive variable suspension system DTCs are not output A
      Adaptive variable suspension system DTCs are output B

    • AClick here
    • B

      GO TO ADAPTIVE VARIABLE SUSPENSION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING)Click here

  2. Click here

    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

    • OKClick here
    • NG

      INSTALL HEIGHT CONTROL SENSOR SUB-ASSEMBLY CORRECTLY for Front Side :Click here

      INSTALL HEIGHT CONTROL SENSOR SUB-ASSEMBLY CORRECTLY for Rear Side :Click here

  3. Click here

    INSPECT HEIGHT CONTROL SENSOR SUB-ASSEMBLY (FRONT OR REAR)


    1. For Front Side.


      1. Turn the power switch off.

      2. Inspect the front height control sensor sub-assembly RH or front height control sensor sub-assembly LH.

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    2. For Rear Side.


      1. Turn the power switch off.

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

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      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

  4. Click here

    CHECK HARNESS AND CONNECTOR (FRONT HEIGHT CONTROL SENSOR SUB-ASSEMBLY - SUSPENSION CONTROL ECU)


    1. Check the front height control sensor sub-assembly RH harness and connector.


      1. Turn the power switch off.

      2. Disconnect the A69*1 or A75*2 front height control sensor sub-assembly RH connector.


        • *1: for AWD

        • *2: for 2WD

      3. Disconnect the L105 suspension control ECU connector.

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

        Standard Resistance
        Table 1. for AWD
        Tester Connection Condition Specified Condition
        A69-2 (SHFR) - L105-13 (SHFR) Always Below 1 Ω
        A69-2 (SHFR) or L105-13 (SHFR) - Body ground Always 10 kΩ or higher
        A69-3 (SHB) - L105-25 (SHB1) Always Below 1 Ω
        A69-3 (SHB) or L105-25 (SHB1) - Body ground Always 10 kΩ or higher
        Table 2. for 2WD
        Tester Connection Condition Specified Condition
        A75-2 (SHFR) - L105-13 (SHFR) Always Below 1 Ω
        A75-2 (SHFR) or L105-13 (SHFR) - Body ground Always 10 kΩ or higher
        A75-3 (SHB) - L105-25 (SHB1) Always Below 1 Ω
        A75-3 (SHB) or L105-25 (SHB1) - Body ground Always 10 kΩ or higher

    2. Check the front height control sensor sub-assembly LH harness and connector.


      1. Turn the power switch off.

      2. Disconnect the A68*1 or A74*2 front height control sensor sub-assembly LH connector.


        • *1: for AWD

        • *2: for 2WD

      3. Disconnect the L105 suspension control ECU connector.

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

        Standard Resistance
        Table 3. for AWD
        Tester Connection Condition Specified Condition
        A68-2 (SHFL) - L105-23 (SHFL) Always Below 1 Ω
        A68-2 (SHFL) or L105-23 (SHFL) - Body ground Always 10 kΩ or higher
        A68-3 (SHB) - L105-11 (SHB2) Always Below 1 Ω
        A68-3 (SHB) or L105-11 (SHB2) - Body ground Always 10 kΩ or higher
        Table 4. for 2WD
        Tester Connection Condition Specified Condition
        A75-2 (SHFL) - L105-23 (SHFL) Always Below 1 Ω
        A75-2 (SHFL) or L105-23 (SHFL) - Body ground Always 10 kΩ or higher
        A75-3 (SHB) - L105-11 (SHB2) Always Below 1 Ω
        A75-3 (SHB) or L105-11 (SHB2) - Body ground Always 10 kΩ or higher
      Result
      Result
      OK
      NG

    • OK

      REPLACE SUSPENSION CONTROL ECUClick here

    • NG

      REPAIR OR REPLACE HARNESS AND CONNECTOR

  5. Click here

    CHECK HARNESS AND CONNECTOR (REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY - SUSPENSION CONTROL ECU)


    1. Turn the power switch off.

    2. Disconnect the L104 suspension control ECU 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.

      Standard Resistance
      Table 5. RH
      Tester Connection Condition Specified Condition
      L104-23 (SHRR) - z26-2 (SHRR) Always Below 1 Ω
      L104-23 (SHRR) or z26-2 (SHRR) - Body ground Always 10 kΩ or higher
      L104-24 (SHB3) - z26-3 (SHB) Always Below 1 Ω
      L104-24 (SHB3) or z26-3 (SHB) - Body ground Always 10 kΩ or higher
      Table 6. LH
      Tester Connection Condition Specified Condition
      L104-26 (SHRL) - L179-2 (SHRL) Always Below 1 Ω
      L104-26 (SHRL) or L179-2 (SHRL) - Body ground Always 10 kΩ or higher
      L104-27 (SHB4) - L179-3 (SHB) Always Below 1 Ω
      L104-27 (SHB4) or L179-3 (SHB) - Body ground Always 10 kΩ or higher
      Result
      Result
      OK
      NG

  6. Click here

    INSPECT SKID CONTROL SENSOR WIRE


    1. Turn the power switch off.

    2. Disconnect the L175 or A skid control sensor wire connector.

    3. B004W1DC10
      *A RH *B 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)

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

      Standard Resistance
      Table 7. 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 Always 10 kΩ or higher
      L175 -2 (SHB) - z26 -3 (SHB) Always Below 1 Ω
      L175 -2 (SHB) or z26 -3 (SHB) - Body ground Always 10 kΩ or higher
      Table 8. for LH
      Tester Connection Condition Specified Condition
      A -1 (SHRL) - L179 -2 (SHRL) Always Below 1 Ω
      A -1 (SHRL) or L179 -2 (SHRL) - Body ground Always 10 kΩ or higher
      A -2 (SHB) - L179 -3 (SHB) Always Below 1 Ω
      A -2 (SHB) or L179 -3 (SHB) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    • OK

      REPAIR OR REPLACE HARNESS AND CONNECTOR

    • NG

      REPLACE SKID CONTROL SENSOR WIREClick here