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Inspection Procedure

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 (see ELECTRONIC CIRCUIT INSPECTION PROCEDURE ); 2) DTC inspection; and 3) Techstream inspection (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 (see INITIALIZATION  ).
  1. CHECK ECUS CONNECTED TO CAN BUS 
    1. Turn the engine switch off.
    2. Connect the Techstream to the DLC3.
    3. Check ECUs connected to CAN bus (see DIAGNOSIS SYSTEM ).

    Result 

    RESULT TABLE

    Result Proceed to
    No malfunction appears A
    Malfunction appears B

    B: GO TO  CAN COMMUNICATION SYSTEM 

    A: Go to Next Step 

  2. CHECK DTC (ALL) 
    1. Turn the engine switch off.
    2. Connect the Techstream to the DLC3.
    3. Check for DTC all.

    Result 

    RESULT TABLE

    Condition Proceed to
    DTC Is not output A
    CAN system DTC Is output B
    LIN system DTC Is output C

    B: GO TO  CAN COMMUNICATION SYSTEM 

    C: GO TO LIN COMMUNICATION SYSTEM  (See DIAGNOSTIC TROUBLE CODE TABLE )

    A: Go to Next Step 

  3. CHECK INDICATOR LIGHT OPERATION (ACTIVE TEST) 
    1. Turn the engine switch off.
    2. Connect the Techstream to the DLC3.
    3. Turn the engine switch on (IG) and the Techstream on.
    4. Enter the following menus: Body Electrical / Combination Meter / Active Test.
    5. Check the condition of the absorber control indicator light and height control indicator light by operating the Techstream.

    Combination Meter 

    DIAGNOSTIC NOTE TABLE

    Tester Display Test Part Control Range Diagnostic Note
    Indicat. TEMS Sports Absorber control indicator light (SPORT)/ ON or OFF -
    Indicat. TEMS Comfort Absorber control indicator light (COMFORT)/ ON or OFF -
    Indicat. Height High Height control indicator light (HEIGHT HIGH)/ ON or OFF -

    OK: Indicator light turns on when operating the Techstream. 

    NG: GO TO METER/GAUGE SYSTEM  (See HOW TO PROCEED WITH TROUBLESHOOTING )

    OK: Go to Next Step 

  4. CHECK SWITCH SIGNAL (SUSPENSION CONTROL ECU DATA LIST) 
    1. Turn the engine switch off.
    2. Connect the Techstream to the DLC3.
    3. Turn the engine switch on (IG) and the Techstream on.
    4. Enter the following menus: Chassis / Air suspension / Data List.
    5. Select each item below in the Data List and read its value displayed on the Techstream.

    Air suspension 

    DIAGNOSTIC NOTE TABLE

    Tester Display Measurement Item/Range Normal Condition Diagnostic Note
    Sport switch Absorber control switch (SPORT)/
    ON or OFF    		 ON: SPORT
    OFF: normal    		 -
    Comfort Switch Absorber control switch (COMFORT)/
    ON or OFF    		 ON: COMFORT
    OFF: normal    		 -
    Damping Force Switch 1 Height control switch (HEIGHT HIGH)/
    ON or OFF    		 ON: Switch is pressed and held
    OFF: Switch is not pressed    		 -

    OK: On the Techstream screen, item changes between ON and OFF according to switch operation. 

    Result 

    RESULT TABLE

    Result Proceed to
    NG A
    OK B

    B: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE  (See PROBLEM SYMPTOMS TABLE  )

    A: Go to Next Step 

  5. CHECK SWITCH SIGNAL (NO. 1 CONSOLE SWITCH DATA LIST) 
    1. Turn the engine switch off.
    2. Connect the Techstream to the DLC3.
    3. Turn the engine switch on (IG) and the Techstream on.
    4. Enter the following menus: Body Electrical / Center Console Switch / Data List.
    5. Select each item below in the Data List and read its value displayed on the Techstream.

    Center Console Switch 

    DIAGNOSTIC NOTE TABLE

    Tester Display Measurement Item/Range Normal Condition Diagnostic Note
    SPORT Mode Switch Absorber control switch (SPORT)/
    ON or OFF    		 ON: SPORT
    OFF: normal    		 -
    COMFORT Mode Switch Absorber control switch (COMFORT)/
    ON or OFF    		 ON: COMFORT
    OFF: normal    		 -
    HEIGHT HIGH Switch Height control switch (HEIGHT HIGH)/
    ON or OFF    		 ON: Switch is pressed and held
    OFF: Switch is not pressed    		 -

    OK: On the Techstream screen, item changes between ON and OFF according to switch operation. 

    NG: REPLACE NO. 1 CONSOLE SWITCH 

    OK: REPLACE SUSPENSION CONTROL ECU  (See REMOVAL  )

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