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

id030300800600

3 | Abnormal noise and/or vibration from coupling component
DESCRIPTION | There is abnormal noise and/or vibration from coupling unit during driving.
POSSIBLECAUSE | • 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 (See REAR DIFFERENTIAL ASSEMBLY.) • 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.