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ADAPTIVE VARIABLE SUSPENSION SYSTEM, Diagnostic DTC:C1782

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DTC Code DTC Name
C1782 Power Source Voltage Malfunction
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DESCRIPTION

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate
C1782 Power Source Voltage Malfunction While the engine switch is on (IG), the voltage at terminal B is 10 V or less, or 16 V or more for 0.5 seconds.

  • AVS fuse

  • Battery

  • Charging system

  • Wire harness or connector

  • Absorber control ECU

 Does not come on
Table 1. *a from IG Circuit *b Absorber Control ECU
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WIRING DIAGRAM

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CAUTION / NOTICE / HINT

Note:

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

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


    • Symptom simulation.

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    • DTC inspection.

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    • GTS inspection.

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

  • When the absorber control ECU is replaced, switch to test mode and check that all test mode DTCs are cleared when their respective deletion conditions are met.

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  • Inspect the fuses for circuits related to this system before performing the following inspection procedure.

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PROCEDURE


  1. Click here

    READ VALUE USING GTS (IG POWER SOURCE VOLTAGE)


    1. Turn the engine switch off.

    2. Connect the GTS to the DLC3.

    3. Turn the engine switch on (IG).

    4. Turn the GTS on.

    5. Enter the following menus: Chassis / Air suspension / Data List.


      1. Chassis > Air suspension > Data List
        Tester Display Measurement Item Range Normal Condition Diagnostic Note
        IG Power Source Voltage ECU power supply voltage

        Min.: 0.0 V

        Max.: 25.5 V

        		 11 to 14 V (Actual ECU power supply voltage): Engine switch on (IG) -



      1. Chassis > Air suspension > Data List
        Tester Display
        IG Power Source Voltage




      OK
      The value is as specified in the normal condition column.
      Result
      Proceed to
      OK
      NG

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    CHECK FOR DTC


    1. Clear the DTCs.

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      1. Chassis > Air suspension > Clear DTCs


    2. Turn the engine switch off.

    3. Check for DTCs.

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      1. Chassis > Air suspension > Trouble Codes


      Result
      Result Proceed to
      DTC is not output A
      DTC is output B

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    INSPECT BATTERY


    1. Check the battery voltage.

      Standard Voltage
      11 to 14 V
      Result
      Proceed to
      OK
      NG

  4. Click here

    CHECK TERMINAL VOLTAGE (IGB)


    1. Turn the engine switch off.

    2. Disconnect the A83 absorber control ECU connector.

    3. B0066A8C15
      *a

      Front view of wire harness connector

      (to Absorber Control ECU)

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A83-1 (IGB) - Body ground Engine switch on (IG) 11 to 14 V
      Result
      Proceed to
      OK
      NG

    • OKClick here
    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

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    CHECK HARNESS AND CONNECTOR (GND TERMINAL)


    1. Turn the engine switch off.

    2. Disconnect the A83 absorber control ECU connector.

    3. B0066A8C16
      *a

      Front view of wire harness connector

      (to Absorber Control ECU)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A83-4 (GND) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    • OK

      REPLACE ABSORBER CONTROL ECUClick here

    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR