AIR SUSPENSION SYSTEM Indicator Circuit

DESCRIPTION

The drive mode select switch and height control switch send signals to the mirror switch through LIN communication, and the suspension control ECU sends signals to the mirror switch through CAN communication. If an drive mode select switch or height control switch signal is input into the suspension control ECU, the ECU sends a signal to the combination meter, which then illuminates the indicator.

WIRING DIAGRAM

A001D2SE03

CAUTION / NOTICE / HINT

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 (ECU 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.

PROCEDURE


  1. CHECK ECUS CONNECTED TO CAN BUS


    1. Turn the engine switch off.

    2. Connect the intelligent tester to the DLC3.

    3. Check ECUs connected to the CAN bus for LHD (See page ) or for RHD Click here.

      Result
      Result Proceed to
      No malfunction appears A
      Malfunction appears (for LHD) B
      Malfunction appears (for RHD) C

    B

    GO TO CAN COMMUNICATION SYSTEM Click here

    C

    GO TO CAN COMMUNICATION SYSTEM Click here

    A

  2. CHECK DTC (ALL)


    1. Turn the engine switch off.

    2. Connect the intelligent tester to the DLC3.

    3. Check for any DTCs.

      Result
      Condition Proceed to
      DTC is not output A
      CAN system DTC is output (for LHD) B
      CAN system DTC is output (for RHD) C
      LIN system DTC is output D

    B

    GO TO CAN COMMUNICATION SYSTEM Click here

    C

    GO TO CAN COMMUNICATION SYSTEM Click here

    D

    GO TO LIN COMMUNICATION SYSTEM Click here

    A

  3. CHECK SWITCH SIGNAL (COMBINATION SWITCH ASSEMBLY DATA LIST)


    1. Turn the engine switch off.

    2. Connect the intelligent tester to the DLC3.

    3. Turn the engine switch on (IG) and turn the tester main switch on.

    4. Enter the following menus:

      Select: Body / Center Console Switch / Data List /

    5. Check the values by referring to the table below.

      Center Console Switch
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      HEIGHT HIGH Switch

      Height control switch /

      ON or OFF

      ON: Switch is pressed and held

      OFF: Switch is not pressed

      		 -
      SPORT Mode Switch

      Drive mode select switch "SPORT S+" mode /

      ON or OFF

      ON: Switch turned right and held

      OFF: Switch is not turned

      		 -
      COMFORT Mode Switch

      Drive mode select switch "COMFORT" mode /

      ON or OFF

      ON: Switch turned left and held

      OFF: Switch is not turned

      		 -
      OK
      On tester screen, each item changes between ON and OFF according to switch operation.
      Result
      Result Proceed to
      OK A
      NG (for AA80E) B
      NG (for AA80F) C

    B

    REPLACE COMBINATION SWITCH ASSEMBLY Click here

    C

    REPLACE COMBINATION SWITCH ASSEMBLY Click here

    A

  4. CHECK SWITCH SIGNAL (SUSPENSION CONTROL ECU DATA LIST)


    1. Turn the engine switch off.

    2. Connect the intelligent tester to the DLC3.

    3. Turn the engine switch on (IG) and turn the tester main switch on.

    4. Enter the following menus:

      Select: Chassis / Air suspension / Data List /

    5. Check the values by referring to the table below.

      Air Suspension
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      COMFORT Switch

      Drive mode select switch "COMFORT" mode /

      ON or OFF

      ON: COMF mode

      OFF: Not in COMF mode

      		 -
      SPORT Switch

      Drive mode select switch "SPORT S+" mode /

      ON or OFF

      ON: SPORT S+ mode

      OFF: Not in SPORT S+ mode

      		 -
      Damping Force Switch 1

      Height control switch /

      ON or OFF

      ON: Switch is pressed and held

      OFF: Switch is not pressed

      		 -
      OK
      On tester screen, each item changes between ON and OFF according to switch operation.
      Result
      Result Proceed to
      OK A
      NG (for LHD) B
      NG (for RHD) C

    A

    GO TO METER / GAUGE SYSTEM Click here

    B

    REPLACE SUSPENSION CONTROL ECU Click here

    C

    REPLACE SUSPENSION CONTROL ECU Click here