ADAPTIVE VARIABLE SUSPENSION SYSTEM, Diagnostic DTC:C1782

DTC Code DTC Name
C1782 Power Source Voltage Malfunction

DESCRIPTION

DTC Code Detection Condition Trouble Area
C1782 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

WIRING DIAGRAM

A01FU8WE22

INSPECTION PROCEDURE

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 Click here; 2) DTC inspection Click here; 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.

      Air Suspension
      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) -
      OK
      The normal condition value is displayed on the GTS.

    NG
    OK
  2. CHECK FOR DTC


    1. Clear the DTCs Click here.

    2. Turn the power switch off.

    3. Check for DTCs Click here.

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

    B
    A
  3. INSPECT BATTERY


    1. Check the battery voltage.

      Standard voltage
      11 to 14 V
      Result
      Result Proceed to
      OK A
      NG (for 2GR-FXE) B
      NG (for 2AR-FSE) C

    B
    C
    A
  4. CHECK TERMINAL VOLTAGE (B)


    1. Disconnect the absorber control ECU connector.

    2. A01FTGIE08
      Text in Illustration
      *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 Switch Condition Specified Condition
      N105-3 (B) - Body ground Power switch on (IG) 11 to 14 V

    NG
    OK
  5. CHECK HARNESS AND CONNECTOR (GND TERMINAL)


    1. Disconnect the absorber control ECU connector.

    2. A01FTGIE11
      Text in Illustration
      *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
      N105-5 (GND) - Body ground Always Below 1 Ω

    NG
    OK