Abnormal Noise: Procedure

1. Inspect the installation conditions of the front and rear active stabilizer control actuators.

   OK

   Installed securely (no looseness or rattling).

NG → REPAIR LOOSENESS OR RATTLING, OR REPLACE STABILIZER 

OK: Go to next step 

1. Turn the engine switch off.
2. Disconnect the rear active stabilizer control ECU connector and put the vehicle in fail-safe mode.
3. While in fail-safe mode, perform the driving test and check if the noise recurs from the same areas of the vehicle.
   RESULT
   
   

   Result	Proceed to
   Noise recurs	A
   Noise does not recur	B

B → See step   4 

A: Go to next step 

1. Disconnect the rear active stabilizer control ECU connector and put the vehicle in fail-safe mode.
2. Remove one side of the stabilizer link. For the front side, refer to the following procedures. Refer to REMOVAL - Step 7 . For the rear side, refer to the following procedures. Refer to REMOVAL - Step 11 .

   HINT: 

   One side of the stabilizer link is removed to reduce strain on the link when it experiences a shock or impact on the road.

3. With one side of the stabilizer link removed, perform the driving test and check if the noise recurs from the same areas of the vehicle.
   NOTE:

   The driving test must be performed in fail-safe mode. If the test is conducted in the normal mode, the stabilizer bar will move and damage nearby parts.

   RESULT
   
   

   Result	Proceed to
   Noise does not recur	A
   Noise recurs	B

B → REPLACE ACTIVE STABILIZER CONTROL ACTUATOR (ON SIDE WHERE NOISE OCCURS) 

A: Go to next step 

1. Turn the engine switch off.
2. Exchange the front active stabilizer control ECU with the rear active stabilizer control ECU.
3. Restore the vehicle to its original state.
4. Connect Techstream to the DLC3.
5. Turn the engine switch on (IG) and press the Techstream main switch ON.
6. Clear the DTC.
7. Perform the driving test and check if the noise recurs from the same areas of the vehicle.
   RESULT
   
   

   Result	Proceed to
   Location of noise has not changed	A
   Location of noise has changed	B
   Noise has stopped	C

   HINT: 

   • If the problem area has changed, replace the active stabilizer control ECU on the side in which the problem is occurring.
   • If the problem area has not changed, replace the active stabilizer control actuator on the side in which the problem is occurring.

B → REPLACE ACTIVE STABILIZER CONTROL ECU 

A → REPLACE ACTIVE STABILIZER CONTROL ACTUATOR 

C: Go to next step 

1. Restore the exchanged ECU to its original location.
2. Perform the driving test to determine if the ECU is securely installed.
3. Check if noise occurs.

   OK

   Noise does not occur.

OK → CHECK INTERMITTENT PROBLEMS 

NG → REPLACE ACTIVE STABILIZER CONTROL ECU (ON SIDE WHERE NOISE OCCURS)