ADAPTIVE VARIABLE SUSPENSION SYSTEM, Diagnostic DTC:C1782

DTC Code DTC Name
C1782 Power Source Voltage Malfunction

DESCRIPTION

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

  • AVS fuse

  • Battery

  • Charging system

  • Harness or connector

  • Absorber control ECU

 Does not come on

WIRING DIAGRAM

A00213WE28
*a from IG Circuit
*b Absorber Control ECU

CAUTION / NOTICE / HINT

Note


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

  • Before replacing the absorber control ECU, perform all of the following again: 1) symptom simulation ; 2) DTC inspection; and 3) GTS inspection (ECU Data List or Active Test Click here). 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.

    Click here

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

PROCEDURE


  1. READ VALUE USING GTS (IG POWER SOURCE VOLTAGE)


    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 / Air suspension / Data List.


      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): Power switch on (IG) -

      Chassis > Air suspension > Data List
      Tester Display
      IG Power Source Voltage
      OK
      The normal condition value is displayed on the GTS.
      Result
      Proceed to
      OK
      NG

    NG

    INSPECT BATTERY Click here

    OK

  2. CHECK FOR DTC


    1. Clear the DTCs.

      Click here


      Chassis > Air suspension > Clear DTCs

    2. Turn the power switch off.

    3. Check for DTCs.

      Click here


      Chassis > Air suspension > Trouble Codes
      Result
      Result Proceed to
      DTC is not output A
      DTC is output B

    A

    USE SIMULATION METHOD TO CHECK Click here

    B

    REPLACE ABSORBER CONTROL ECU Click here

  3. INSPECT BATTERY


    1. Check the battery voltage.

      Standard Voltage
      11 to 14 V
      Result
      Proceed to
      OK
      NG

    NG

    CHECK OR REPLACE CHARGING SYSTEM OR BATTERY Click here

    OK

  4. CHECK TERMINAL VOLTAGE (B)


    1. Disconnect the K39 absorber control ECU connector.

    2. A0021J3C05
      *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
      K39-3 (B) - Body ground Power switch on (IG) 11 to 14 V
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. CHECK HARNESS AND CONNECTOR (GND TERMINAL)


    1. Disconnect the K39 absorber control ECU connector.

    2. A0021J3C06
      *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
      K39-5 (GND) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE ABSORBER CONTROL ECU Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR