ADAPTIVE VARIABLE SUSPENSION SYSTEM, Diagnostic DTC:C1715, C1716, C1717, C1796, C1797, C1798

DTC Code DTC Name
C1715 Front Acceleration Sensor RH Malfunction
C1716 Front Acceleration Sensor LH Malfunction
C1717 Rear Acceleration Sensor Malfunction
C1796 Front Acceleration Sensor RH Malfunction (Test Mode DTC)
C1797 Front Acceleration Sensor LH Malfunction (Test Mode DTC)
C1798 Rear Acceleration Sensor Malfunction (Test Mode DTC)

DESCRIPTION

The acceleration sensor assembly detects the upward and downward acceleration of the vehicle and outputs it as a voltage to the absorber control ECU.

The 3 acceleration sensors are installed in the driver side instrument panel, the passenger sideinstrument panel and the absorber control ECU.

Each acceleration sensor assembly independently detects the upward and downward acceleration of the vehicle.

During a test mode inspection, the absorber control ECU reads the fluctuations in each sensor signal.

When a sensor signal does not fluctuate, test mode DTCs C1796, C1797 and C1798 remain stored.

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Memory
C1715 Front Acceleration Sensor RH Malfunction

One of the following conditions is met:


  • With the power switch on (IG), a voltage of 5.5 V or higher, or 4.3 V or less is detected at the power source of the acceleration sensor assembly RH for 0.5 seconds.

  • With the power switch on (IG), a voltage of 4.7 V or higher, or 0.3 V or less is detected at the acceleration sensor assembly RH for 1 second.

  • Sensor output value is +/- 0.0638 m/s2continuously for 300 seconds.

  • Acceleration sensor assembly RH

  • Wire harness or connector

  • Absorber control ECU

 Does not come on Yes
C1716 Front Acceleration Sensor LH Malfunction

One of the following conditions is met:


  • With the power switch on (IG), a voltage of 5.5 V or higher, or 4.3 V or less is detected at the power source of the acceleration sensor assembly LH for 0.5 seconds.

  • With the power switch on (IG), a voltage of 4.7 V or higher, or 0.3 V or less is detected at the acceleration sensor assembly LH for 1 second.

  • Sensor output value is +/- 0.0638 m/s2continuously for 300 seconds.

  • Acceleration sensor assembly LH

  • Wire harness or connector

  • Absorber control ECU

 Does not come on Yes
C1717 Rear Acceleration Sensor Malfunction

One of the following conditions is met:


  • With the power switch on (IG), a voltage of 5.5 V or higher, or 4.3 V or less is detected at the power source of the rear acceleration sensor (absorber control ECU) for 0.5 seconds.

  • With the power switch on (IG), a voltage of 4.7 V or higher, or 0.3 V or less is detected at the rear acceleration sensor (absorber control ECU) for 1 second.

  • Sensor output value is +/- 0.0638 m/s2continuously for 300 seconds.

 Absorber control ECU Does not come on Yes
C1796 Front Acceleration Sensor RH Malfunction (Test Mode DTC)

With the vehicle stationary on a level surface, an acceleration sensor value that is within -1.96 to 1.96 m/s2is not received from the acceleration sensor assembly RH for 1 second or more.

  • Acceleration sensor assembly RH

  • Wire harness or connector

  • Absorber control ECU

 - -
C1797 Front Acceleration Sensor LH Malfunction (Test Mode DTC)

With the vehicle stationary on a level surface, an acceleration sensor value that is within -1.96 to 1.96 m/s2is not received from the acceleration sensor assembly LH for 1 second or more.

  • Acceleration sensor assembly LH

  • Wire harness or connector

  • Absorber control ECU

 - -
C1798 Rear Acceleration Sensor Malfunction (Test Mode DTC)

With the vehicle stationary on a level surface, an acceleration sensor value that is within -1.96 to 1.96 m/s2is not received from the rear acceleration sensor (absorber control ECU) for 1 second or more.

 Absorber control ECU - -
DTC Detection Conditions: C1715
Vehicle Condition
Pattern 1 Pattern 2 Pattern 3 Pattern 4 Pattern 5
Diagnosis Condition Power switch is on (IG) ○ ○ ○ ○ ○
Malfunction Status Sensor power source voltage is 4.3 V or less ○ - - - -
Sensor 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 - - - ○ -

Sensor output value is +/- 0.0638 m/s2

- - - - ○
Detection Time 0.5 seconds or more 0.5 seconds or more 1 second or more 1 second or more 300 seconds or more
Number of Trips 1 trip 1 trip 1 trip 1 trip 1 trip

Tech Tips

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

DTC Detection Conditions: C1716
Vehicle Condition
Pattern 1 Pattern 2 Pattern 3 Pattern 4 Pattern 5
Diagnosis Condition Power switch is on (IG) ○ ○ ○ ○ ○
Malfunction Status Sensor power source voltage is 4.3 V or less ○ - - - -
Sensor 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 - - - ○ -

Sensor output value is +/- 0.0638 m/s2

- - - - ○
Detection Time 0.5 seconds or more 0.5 seconds or more 1 second or more 1 second or more 300 seconds or more
Number of Trips 1 trip 1 trip 1 trip 1 trip 1 trip

Tech Tips

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

DTC Detection Conditions: C1717
Vehicle Condition
Pattern 1 Pattern 2 Pattern 3 Pattern 4 Pattern 5
Diagnosis Condition Power switch is on (IG) ○ ○ ○ ○ ○
Malfunction Status Sensor power source voltage is 4.3 V or less ○ - - - -
Sensor 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 - - - ○ -

Sensor output value is +/- 0.0638 m/s2

- - - - ○
Detection Time 0.5 seconds or more 0.5 seconds or more 1 second or more 1 second or more 300 seconds or more
Number of Trips 1 trip 1 trip 1 trip 1 trip 1 trip

Tech Tips

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

WIRING DIAGRAM

B004SEME14
*a SGG
*b Acceleration Sensor Assembly RH
*c Acceleration Sensor Assembly LH
*d Absorber Control ECU

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. READ VALUE USING GTS ((UP & DOWN) G SENSOR)


    1. Turn the power switch off.

    2. Connect the GTS to the DLC3.

    3. Turn the power switch on (IG).

    4. Turn the GTS on.

    5. Enter the following menus: Chassis / Adaptive Variable Suspension System / Data List.


      Chassis > Adaptive Variable Suspension System > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      (Up&Down)G Sensor FR Acceleration sensor assembly RH (up and down)

      Min.: -1045.29 m/s2

      Max.: 1045.26 m/s2

      -0.98 to 0.98 m/s2

      when stationary

      		 The value changes when the vehicle (front RH) is bounced.
      (Up&Down)G Sensor FL Acceleration sensor assembly LH (up and down)

      Min.: -1045.29 m/s2

      Max.: 1045.26 m/s2

      -0.98 to 0.98 m/s2

      when stationary

      		 The value changes when the vehicle (front LH) is bounced.
      (Up&Down)G Sensor Rear Rear acceleration sensor (up and down)

      Min.: -1045.29 m/s2

      Max.: 1045.26 m/s2

      -0.98 to 0.98 m/s2

      when stationary

      		 The value changes when the vehicle (rear) is bounced.

      Chassis > Adaptive Variable Suspension System > Data List
      Tester Display
      (Up&Down)G Sensor FR
      (Up&Down)G Sensor FL
      (Up&Down)G Sensor Rear
      OK
      The values are as specified in the normal condition column.
      Result
      Result Proceed to
      OK A
      NG (front RH or front LH) B
      NG (rear) C

    B

    GO TO STEP 3 Click here

    C

    REPLACE ABSORBER CONTROL ECU Click here

    A

  2. CHECK FOR DTCS


    1. Clear the DTCs.

      Click here


      Chassis > Adaptive Variable Suspension System > Clear DTCs

    2. Turn the power switch off.

    3. Check for DTCs.

      Click here


      Chassis > Adaptive Variable Suspension System > Trouble Codes
      Result
      Result Proceed to
      DTCs are output (C1715 or C1716) A
      DTCs is output (C1717) B
      DTCs are not output C

    B

    REPLACE ABSORBER CONTROL ECU Click here

    C

    USE SIMULATION METHOD TO CHECK Click here

    A

  3. INSPECT ACCELERATION SENSOR ASSEMBLY


    1. Turn the power switch off.

    2. Remove the acceleration sensor assembly RH or acceleration sensor assembly LH.

      Click here

    3. Inspect the acceleration sensor assembly RH or acceleration sensor assembly LH.

      Click here

      Result
      Result Proceed to
      OK A
      Acceleration sensor assembly RH malfunction B
      acceleration sensor assembly LH malfunction C

    B

    REPLACE ACCELERATION SENSOR ASSEMBLY RH Click here

    C

    REPLACE ACCELERATION SENSOR ASSEMBLY LH Click here

    A

  4. CHECK HARNESS AND CONNECTOR (ACCELERATION SENSOR ASSEMBLY - ABSORBER CONTROL ECU)


    1. Check the acceleration sensor assembly RH harness and connector (when DTC C1715 is output).


      1. Disconnect the L46 absorber control ECU connector.

      2. Disconnect the L36 acceleration sensor assembly RH connector.

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        L36-1 (SGFR) - L46-23 (SGS1) Always Below 1 Ω
        L36-2 (SGG) - L46-22 (SGG1) Always Below 1 Ω
        L36-3 (SGB) - L46-14 (SGB1) Always Below 1 Ω
        L36-1 (SGFR) or L46-23 (SGS1) - Body ground Always 10 kΩ or higher
        L36-2 (SGG) or L46-22 (SGG1) - Body ground Always 10 kΩ or higher
        L36-3 (SGB) or L46-14 (SGB1) - Body ground Always 10 kΩ or higher

    2. Check the acceleration sensor assembly LH harness and connector (when DTC C1716 is output).


      1. Disconnect the L46 absorber control ECU connector.

      2. Disconnect the L47 acceleration sensor assembly LH connector.

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        L47-1 (SGFL) - L46-25 (SGS2) Always Below 1 Ω
        L47-2 (SGG) - L46-24 (SGG2) Always Below 1 Ω
        L47-3 (SGB) - L46-15 (SGB2) Always Below 1 Ω
        L47-1 (SGFL) or L46-25 (SGS2) - Body ground Always 10 kΩ or higher
        L47-2 (SGG) or L46-24 (SGG2) - Body ground Always 10 kΩ or higher
        L47-3 (SGB) or L46-15 (SGB2) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE ABSORBER CONTROL ECU Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR