Abnormal Noise

SUSPENSION CONTROL: ACTIVE STABILIZER SUSPENSION SYSTEM: Abnormal Noise
- Abnormal Noise

DESCRIPTION

This troubleshooting procedure is conducted to determine if the active stabilizer suspension system is the cause of the problem.

INSPECTION PROCEDURE

PROCEDURE

1. INSPECT ACTIVE STABILIZER INSTALLATION CONDITION

(a) 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 -- Continue to next step.

2. CONFIRM PHENOMENON (FAIL-SAFE MODE)

(a) Turn the power switch OFF.

(b) Disconnect the rear active stabilizer control ECU connector and put the vehicle in fail-safe mode.

(c) While in fail-safe mode, perform the driving test and check if the noise recurs from the same areas of the vehicle.

Result





B -- CHECK OPERATION OF ACTIVE STABILIZER CONTROL ECU
A -- Continue to next step.

3. CONFIRM PHENOMENON (STABILIZER LINK)

(a) Disconnect the rear active stabilizer control ECU connector and put the vehicle in fail-safe mode.

(b) Remove one side of the stabilizer link. For the front side, refer to the following procedures Removal. For the rear side, refer to the following procedures Removal.

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.

(c) 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.

NOTICE:
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





B -- REPLACE ACTIVE STABILIZER CONTROL ACTUATOR (ON SIDE WHERE NOISE OCCURS)
A -- Continue to next step.

4. CHECK OPERATION OF ACTIVE STABILIZER CONTROL ECU

(a) Turn the power switch OFF.

(b) Exchange the front active stabilizer control ECU with the rear active stabilizer control ECU.

(c) Restore the vehicle to its original state.

(d) Connect the Techstream to the DLC3.

(e) Turn the power switch ON (IG) and press the Techstream main switch ON.

(f) Clear the DTC.

(g) Perform the driving test and check if the noise recurs from the same areas of the vehicle.

Result





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 -- Continue to next step.

5. CHECK OPERATION OF ACTIVE STABILIZER CONTROL ECU

(a) Restore the exchanged ECU to its original location.

(b) Perform the driving test to determine if the ECU is securely installed.

(c) Check if noise occurs.

OK:

Noise does not occur.

OK -- CHECK INTERMITTENT PROBLEMS

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