NO.3 ABNORMAL NOISE AND/OR VIBRATION FROM COUPLING COMPONENT [ELECTRONIC 4WD CONTROL SYSTEM]

id0303c6135100

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, PCM, TCM, EPS, AND 4WD SYSTEM DTCS • Verify DSC, PCM, TCM, EPS, and 4WD system DTCs using the M-MDS. (See DTC INSPECTION [DSC HU/CM].) (See ON-BOARD DIAGNOSTIC TEST [PCM (SKYACTIV-G 2.5T)].) (See ON-BOARD DIAGNOSTIC SYSTEM DTC INSPECTION [TCM (GW6A-EL, GW6AX-EL)].) (See DTC INSPECTION [ELECTRIC POWER STEERING (EPS)].) (See DTC INSPECTION [ELECTRONIC 4WD CONTROL SYSTEM].) • 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 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.)
4		No	Inspect malfunctioning part and adjust it if necessary.