AIR SUSPENSION SYSTEM, Diagnostic DTC:C1782/82

DTC Code DTC Name
C1782/82 Low Battery Positive Voltage

DESCRIPTION

DTC Code DTC Detection Condition Trouble Area
C1782/82 The voltage at terminal IG or B is 10 V or less or 16 V or higher for 0.5 seconds.

  • Battery

  • Charging system

  • AIR SUS fuse

  • AIR SUS NO. 2 fuse

  • AVS fuse

  • Harness or connector

  • Suspension control ECU

WIRING DIAGRAM

A01DUGBE01

INSPECTION PROCEDURE

Note


  • When replacing the suspension control ECU, perform registration Click here.

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

PROCEDURE


  1. READ VALUE USING INTELLIGENT TESTER (IG/+B POWER SOURCE VOLTAGE)


    1. Turn the ignition switch off.

    2. Connect the intelligent tester to the DLC3.

    3. Turn the ignition switch to ON.

    4. Turn the intelligent tester 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 Actual ECU power supply voltage / Min.: 0.0 V, Max.: 25.5 V Ignition switch ON: 11 to 14 V -
      +B Power Source Voltage Actual battery supply voltage / Min.: 0.0 V, Max.: 25.5 V Ignition switch ON: 11 to 14 V -
      Standard voltage
      11 to 14 V
      Result
      Result Proceed to
      NG A
      OK (When troubleshooting according to problem symptoms table) B
      OK (When troubleshooting according to DTC chart) C

    B

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

    C

    USE SIMULATION METHOD TO CHECK Click here

    A

  2. CHECK TERMINAL VOLTAGE (IG, B)


    1. Disconnect the A49 suspension control ECU connector.

    2. A01DM5EE01
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Suspension Control ECU)

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A49-3 (B) - Body ground Always 11 to 14 V
      A49-1 (IG) - Body ground Ignition switch ON 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK HARNESS AND CONNECTOR (SUSPENSION CONTROL ECU - BODY GROUND)


    1. Disconnect the A49 and R19 suspension control ECU connectors.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      R19-10 (GND) - Body ground Always Below 1Ω
      A49-5 (GND) - Body ground Always Below 1Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK FOR DTC


    1. Clear the DTCs Click here.

    2. Check for DTCs Click here.

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

    B

    REPLACE SUSPENSION CONTROL ECU Click here

    A

    USE SIMULATION METHOD TO CHECK Click here