ADAPTIVE VARIABLE SUSPENSION SYSTEM, Diagnostic DTC:C1711, C1712, C1713, C1714

DTC Code DTC Name
C1711 Front Height Control Sensor RH Circuit Malfunction
C1712 Front Height Control Sensor LH Circuit Malfunction
C1713 Rear Height Control Sensor RH Circuit Malfunction
C1714 Rear Height Control Sensor LH Circuit Malfunction

DESCRIPTION

The height control sensor sub-assembly changes the resistance according to the change in vehicle height. The absorber 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 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
C1711 Front Height Control Sensor RH Circuit Malfunction

One of the following conditions is met:


  • The power source voltage of the front height control sensor sub-assembly RH is 4.3 V or less, or 5.5 V or higher continuously for 0.5 seconds.*

  • The output voltage of the front height control sensor sub-assembly RH is 0.3 V or less, or 4.7 V or higher continuously for 1 second.

  • Front height control sensor sub-assembly RH stuck malfunction.

  • Front height control sensor sub-assembly RH

  • Wire harness or connector

  • Absorber control ECU

 Does not come on Yes
C1712 Front Height Control Sensor LH Circuit Malfunction

One of the following conditions is met:


  • The power source voltage of the front height control sensor sub-assembly LH is 4.3 V or less, or 5.5 V or higher continuously for 0.5 seconds.*

  • The output voltage of the front height control sensor sub-assembly LH is 0.3 V or less, or 4.7 V or higher continuously for 1 second.

  • Front height control sensor sub-assembly LH stuck malfunction.

  • Front height control sensor sub-assembly LH

  • Wire harness or connector

  • Absorber control ECU

 Does not come on Yes
C1713 Rear Height Control Sensor RH Circuit Malfunction

One of the following conditions is met:


  • The power source voltage of the rear height control sensor sub-assembly RH is 4.3 V or less, or 5.5 V or higher continuously for 0.5 seconds.*

  • The output voltage of the rear height control sensor sub-assembly RH is 0.3 V or less, or 4.7 V or higher continuously for 1 second.

  • Rear height control sensor sub-assembly RH stuck malfunction.

  • Rear height control sensor sub-assembly RH

  • Wire harness or connector

  • Absorber control ECU

 Does not come on Yes
C1714 Rear Height Control Sensor LH Circuit Malfunction

One of the following conditions is met:


  • The power source voltage of the rear height control sensor sub-assembly LH is 4.3 V or less, or 5.5 V or higher continuously for 0.5 seconds.*

  • The output voltage of the rear height control sensor sub-assembly LH is 0.3 V or less, or 4.7 V or higher continuously for 1 second.

  • Rear height control sensor sub-assembly LH stuck malfunction.

  • Rear height control sensor sub-assembly LH

  • Wire harness or connector

  • Absorber control ECU

 Does not come on Yes

DTC Detection Conditions: C1711
Vehicle Condition
Pattern 1 Pattern 2 Pattern 3 Pattern 4 Pattern 5
Diagnosis Condition Power switch is on (IG) ○ ○ ○ ○ ○
Malfunction Status Power source voltage is 4.3 V or less* ○ - - - -
Power source voltage is 5.5 V or higher* - ○ - - -
Output voltage is 0.3 V or less - - ○ - -
Output voltage is 4.7 V or higher - - - ○ -
Height control sensor stuck - - - - ○
Detection Time 0.5 seconds or more 0.5 seconds or more 1 second or more 1 second or more -
Number of Trips 1 trip 1 trip 1 trip 1 trip 1 trip
*: w/o Air Suspension

Tech Tips

DTC will be output when conditions for either of the patterns in the table above are met.

DTC Detection Conditions: C1712
Vehicle Condition
Pattern 1 Pattern 2 Pattern 3 Pattern 4 Pattern 5
Diagnosis Condition Power switch is on (IG) ○ ○ ○ ○ ○
Malfunction Status Power source voltage is 4.3 V or less* ○ - - - -
Power source voltage is 5.5 V or higher* - ○ - - -
Output voltage is 0.3 V or less - - ○ - -
Output voltage is 4.7 V or higher - - - ○ -
Height control sensor stuck - - - - ○
Detection Time 0.5 seconds or more 0.5 seconds or more 1 second or more 1 second or more -
Number of Trips 1 trip 1 trip 1 trip 1 trip 1 trip
*: w/o Air Suspension

Tech Tips

DTC will be output when conditions for either of the patterns in the table above are met.

DTC Detection Conditions: C1713
Vehicle Condition
Pattern 1 Pattern 2 Pattern 3 Pattern 4 Pattern 5
Diagnosis Condition Power switch is on (IG) ○ ○ ○ ○ ○
Malfunction Status Power source voltage is 4.3 V or less* ○ - - - -
Power source voltage is 5.5 V or higher* - ○ - - -
Output voltage is 0.3 V or less - - ○ - -
Output voltage is 4.7 V or higher - - - ○ -
Height control sensor stuck - - - - ○
Detection Time 0.5 seconds or more 0.5 seconds or more 1 second or more 1 second or more -
Number of Trips 1 trip 1 trip 1 trip 1 trip 1 trip
*: w/o Air Suspension

Tech Tips

DTC will be output when conditions for either of the patterns in the table above are met.

DTC Detection Conditions: C1714
Vehicle Condition
Pattern 1 Pattern 2 Pattern 3 Pattern 4 Pattern 5
Diagnosis Condition Power switch is on (IG) ○ ○ ○ ○ ○
Malfunction Status Power source voltage is 4.3 V or less* ○ - - - -
Power source voltage is 5.5 V or higher* - ○ - - -
Output voltage is 0.3 V or less - - ○ - -
Output voltage is 4.7 V or higher - - - ○ -
Height control sensor stuck - - - - ○
Detection Time 0.5 seconds or more 0.5 seconds or more 1 second or more 1 second or more -
Number of Trips 1 trip 1 trip 1 trip 1 trip 1 trip
*: w/o Air Suspension

Tech Tips

DTC will be output when conditions for either of the patterns in the table above are met.

WIRING DIAGRAM

Figure 1. w/o Air Suspension:

B004SK5E02

Figure 2. w/ Air Suspension:

B004WVVE02

Figure 3. w/ Air Suspension:

B004SMNE01

CAUTION / NOTICE / HINT

Note


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

  • If DTC C1782 (Power Source Voltage Malfunction) is output at the same time, perform troubleshooting for C1782 first.

    Click here

  • Before replacing the absorber control ECU, perform all of the following:


    • Symptom simulation.

      Click here

    • DTC inspection.

      Click here

    • GTS inspection.

      Click here


      • If no malfunctions are found in other areas, replace the absorber control ECU.

  • After replacing the absorber control ECU with a new one, perform registration of vehicle identification information.

    Click here

PROCEDURE


  1. CHECK SUSPENSION TYPE


    1. Check the suspension type.

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

    B

    CHECK FOR DTCS Click here

    A

  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

    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

    OK

  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.

        Click here

    2. For Rear Side.


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

        Click here

      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

    B

    CHECK HARNESS AND CONNECTOR (REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY - ABSORBER CONTROL ECU) Click here

    C

    REPLACE FRONT HEIGHT CONTROL SENSOR SUB-ASSEMBLY RH Click here

    D

    REPLACE FRONT HEIGHT CONTROL SENSOR SUB-ASSEMBLY LH Click here

    E

    REPLACE REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY RH Click here

    F

    REPLACE REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY LH Click here

    A

  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 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 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 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 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

    OK

    REPLACE ABSORBER CONTROL ECU Click here

    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 power 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 power 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

    OK

    REPLACE ABSORBER CONTROL ECU Click here

    NG

  6. INSPECT SKID CONTROL SENSOR WIRE


    1. Turn the power 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.

      B004W1DC12
      *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)
      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

    OK

    REPAIR OR REPLACE HARNESS AND CONNECTOR

    NG

    REPLACE SKID CONTROL SENSOR WIRE Click here

  7. CHECK FOR DTCS


    1. Check for DTCs.

      Click here


      Chassis > Air suspension > Trouble Codes
      Result
      Result Proceed to
      Air suspension system DTCs are not output A
      Air suspension system DTCs are output B

    B

    GO TO AIR SUSPENSION SYSTEM Click here

    A

  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

    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

    OK

  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.

        Click here

    2. For Rear Side.


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

        Click here

      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

    B

    REPLACE FRONT HEIGHT CONTROL SENSOR SUB-ASSEMBLY RH Click here

    C

    REPLACE FRONT HEIGHT CONTROL SENSOR SUB-ASSEMBLY LH Click here

    D

    REPLACE REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY RH Click here

    E

    REPLACE REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY LH Click here

    A

  10. CHECK HARNESS AND CONNECTOR (HEIGHT CONTROL SENSOR SUB-ASSEMBLY OUTPUT VOLTAGE)


    1. Turn the power switch off.

    2. Disconnect the L30 or L46 absorber control ECU connector.

    3. Measure the resistance 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 Power 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 Power 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 Power 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 Power switch on (IG) Approximately 0.3 to 4.7 V
      Result
      Result
      OK
      NG (for Front)
      NG (for Rear)

    OK

    REPLACE ABSORBER CONTROL ECU Click here

    NG (for Front)

    REPAIR OR REPLACE HARNESS AND CONNECTOR

    NG (for Rear)

  11. INSPECT SKID CONTROL SENSOR WIRE


    1. Turn the power 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.

      B004W1DC09
      *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)
      Standard Resistance
      for RH
      Tester Connection Condition Specified Condition
      L175 -1 (SHRR) - z26 -1 (SHG) Always Below 1 Ω
      L175 -1 (SHRR) or z26 -1 (SHG) - Body ground and other terminals Always 10 kΩ or higher
      Standard Resistance
      for LH
      Tester Connection Condition Specified Condition
      A -1 - L179 -1 (SHG) Always Below 1 Ω
      A -1 or L179 -1 (SHG) - Body ground and other terminals Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPAIR OR REPLACE HARNESS AND CONNECTOR

    NG

    REPLACE SKID CONTROL SENSOR WIRE Click here