NO.3 ABNORMAL NOISE AND/OR VIBRATION FROM COUPLING COMPONENT


3	Abnormal noise and/or vibration from coupling component
[TROUBLESHOOTING HINTS] • Abnormal noise and/or vibration from coupling component during driving • Propeller shaft is malfunctioning or attached improperly. • Engine mount or differential mount malfunction • Resonance of rotating parts on vehicle (engine, propeller shaft, rear differential, tire, etc.) • Resonance with engine vibration (mainly with exhaust system parts) • Rear differential malfunction • Coupling component malfunction


STEP	INSPECTION		ACTION
1	VERIFY DSC, PCM, TCM, AND 4WD SYSTEM DTCS • Verify DSC, PCM, TCM, and 4WD system DTCs using WDS or equivalent. • Are there any DTCs present?	Yes	Go to applicable DTC inspection.
1		No	Go to next step.
2	VERIFY INSTALLATION CONDITION OF VEHICLE PARTS • Verify installation condition for following: - Propeller shaft (including bending and joint operation) - Center bearing - Engine mount - Differential mount - Hub bearing - Exhaust system parts - ABS wheel-speed sensor • Are they properly installed?	Yes	Go to next step.
2		No	Repair or replace malfunctioning part.
3	DETERMINE IF MALFUNCTION IS CAUSED BY REAR DIFFERENTIAL • Install tires of another brand. Note • When tires of another brand are installed, the same malfunction can occur due to conditions different from customer explanation. Be careful not to confuse it with customer complaint. • Perform simulation driving at the same engine speed, gear position, and vehicle speed that customer vehicle had malfunction. • Does the same malfunction occur?	Yes	Reinstall customer's vehicle tire. Go to next step.
3		No	4WD system is okay. Reinstall customer's vehicle tire.
4	INSPECT REAR DIFFERENTIAL • Inspect rear differential for following: - Backlash - Teeth contact (See REAR DIFFERENTIAL ASSEMBLY [L3]) (See REAR DIFFERENTIAL ASSEMBLY [L3 Turbo]) • Are they okay?	Yes	Replace coupling component.
4		No	Inspect malfunctioning part and adjust it if necessary.