AIR SUSPENSION SYSTEM, Diagnostic DTC:C1762

DTC Code DTC Name
C1762 Continuous Electric Current to Exhaust Solenoid

DESCRIPTION

DTC No. Detection Condition Trouble Area
C1762 With the exhaust valve activated, the vehicle does not go down to the standard vehicle height after 6 minutes have elapsed.

  • Air tube

  • No. 1 height control valve

  • No. 2 height control valve

  • Height control compressor

INSPECTION PROCEDURE

Note


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

  • Before replacing the suspension control ECU, perform all of the following again: 1) symptom simulation Click here; 2) DTC inspection; and 3) intelligent tester inspection (Data List or Active Test). If no malfunctions are found in other areas, replace the suspension control ECU.

  • If the suspension control ECU or height control sensor is replaced, the vehicle height offset calibration must be performed Click here.

  • The system may output DTC C1762 even when the system is normal if one of the following occurs: 1) the vehicle is being driven or is stopped on an irregular surface; or 2) the air tubes are clogged with snow or are frozen. If DTC C1762 is output, vehicle height control will stop. However, if the power switch is turned OFF and then ON (IG), vehicle height control will start.

PROCEDURE


  1. CHECK AIR TUBE


    1. Check if any of the air tubes are clogged.

      OK
      No clogs.

    NG

    REPAIR OR REPLACE AIR TUBE

    OK

  2. INSPECT IF NO. 1 HEIGHT CONTROL VALVE IS STUCK


    1. Remove the No. 1 height control valve Click here.

    2. A01H05LE47

      Check the No. 1 height control valve (valve RH).


      1. Apply 12 V battery voltage to the control valve and check the operation of the valve RH.

        OK
        Measurement Condition Specified Condition

        12 V battery positive (+) → Terminal 1 (RH+)

        12 V battery negative (-) → Terminal 2 (E)

        		 It make an operating sound
    3. A01H05LE48

      Check the No. 1 height control valve (valve LH).


      1. Apply 12 V battery voltage to the control valve and check the operation of the valve LH.

        OK
        Measurement Condition Specified Condition

        12 V battery positive (+) → Terminal 3 (LH+)

        12 V battery negative (-) → Terminal 2 (E)

        		 It make an operating sound

    NG

    REPLACE NO. 1 HEIGHT CONTROL VALVE Click here

    OK

  3. INSPECT IF NO. 2 HEIGHT CONTROL VALVE IS STUCK


    1. Remove the No. 2 height control valve Click here.

    2. A01H05LE49

      Check the No. 2 height control valve (valve RH).


      1. Apply 12 V battery voltage to the control valve and check the operation of the valve RH.

        OK
        Measurement Condition Specified Condition

        12 V battery positive (+) → Terminal 1 (+RH)

        12 V battery negative (-) → Terminal 2 (E)

        		 It make an operating sound
    3. A01H05LE50

      Check the No. 2 height control valve (valve LH).


      1. Apply 12 V battery voltage to the control valve and check the operation of the valve LH.

        OK
        Measurement Condition Specified Condition

        12 V battery positive (+) → Terminal 3 (+LH)

        12 V battery negative (-) → Terminal 2 (E)

        		 It make an operating sound

    NG

    REPLACE NO. 2 HEIGHT CONTROL VALVE Click here

    OK

  4. INSPECT IF HEIGHT CONTROL COMPRESSOR EXHAUST VALVE IS STUCK


    1. Remove the height control compressor Click here.

    2. A01H0JTE02

      Inspect if the exhaust valve is stuck


      1. Apply 12 V battery voltage to the exhaust valve and check the operation of the valve.

        OK
        Measurement Condition Specified Condition

        12 V battery positive (+) → Terminal 1

        12 V battery negative (-) → Terminal 2

        		 It should make an operating sound (click)
        Result
        Result Proceed to
        NG A
        OK (for LHD) B
        OK (for RHD) C

    B

    REPLACE SUSPENSION CONTROL ECU Click here

    C

    REPLACE SUSPENSION CONTROL ECU Click here

    A

    REPLACE HEIGHT CONTROL COMPRESSOR Click here