Diagnostic Procedure

ABNORMAL NOISE AND VIBRATION FROM COUPLING UNIT (I-ACTIV AWD SYSTEM) DIAGNOSTIC PROCEDURE

Step	Inspection	Results	Action
1	VERIFY DTCs Perform the DTC inspection for the following modules. (See DTC INSPECTION .) Electronically controlled brake unit/DSC HU/CM ECM (e-SKYACTIV PHEV)/PCM (except e-SKYACTIV PHEV) TCM/selector lever Electric power steering (EPS) control module Electrical supply unit (ESU) Are any DTCs displayed?	Yes	Repair or replace the malfunctioning location according to the applicable DTC troubleshooting. (See DTC TABLE [DSC] .) (See DTC TABLE [ECM (e-SKYACTIV PHEV)] .) (See DTC TABLE [PCM (PYUL)] .) (See DTC TABLE [PCM (H3T)] .) (See DTC TABLE [TCM (PM8AX-EC)] .) (See DTC TABLE [TCM (MM8A (X)-EC)] .) (See DTC TABLE [ECL] .) (See DTC TABLE [EPS] .) (See DTC TABLE [BCM] .)
1		No	Go to the 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 the next step.
2		No	Repair or replace the malfunctioning location and perform the repair completion verification 1.
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 malfunction recur?	Yes	Reinstall customer's vehicle tire, then go to the next step.
3		No	i-ACTIV AWD system is normal. Reinstall customer's vehicle tire.
4	INSPECT REAR DIFFERENTIAL Inspect rear differential for following: (Refer to [REAR DIFFERENTIAL REMOVAL/INSTALLATION ] ). Backlash Teeth contact Are they normal?	Yes	Perform the repair completion verification 1.
4		No	Inspect malfunctioning part and adjust it if necessary and perform the repair completion verification 1.
Repair completion verification 1	VERIFY THAT VEHICLE IS REPAIRED Install/connect the part removed/disconnected during the troubleshooting procedure. Has the malfunction symptom been eliminated?	Yes	Complete the symptom troubleshooting. Explain to the customer what has been repaired.
Repair completion verification 1		No	Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error. (See MALFUNCTION DIAGNOSIS FLOW [CONTROLLER AREA NETWORK (CAN)] .) If the CAN communication is normal, perform the diagnosis from Step 1.