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

id030300800600

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

Diagnostic procedure

STEP

INSPECTION

ACTION
1
VERIFY DSC/RSC, PCM, TCM, INSTRUMENT CLUSTER AND 4WD SYSTEM DTCS
•  Verify DSC/RSC, PCM, TCM, instrument cluster and 4WD system DTCs using the M-MDS.
•  Are there any DTCs present?
Yes
Go to applicable DTC inspection.
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.
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.
•  When change the tires, install the four tires of same abrasion condition.
•  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.
No
4WD system is normal.
Reinstall customer’s vehicle tire.
4
INSPECT REAR DIFFERENTIAL
•  Inspect rear differential for following:
―  Backlash
―  Teeth contact
•  Are they normal?
Yes
Replace coupling component.
(See COUPLING COMPONENT REMOVAL/INSTALLATION.)
(See COUPLING COMPONENT DISASSEMBLY.)
(See COUPLING COMPONENT ASSEMBLY.)
No
Inspect malfunctioning part and adjust it if necessary.