NO.1 FREQUENT FRONT WHEEL SLIP [ELECTRONIC 4WD CONTROL SYSTEM]

id0303c6134900

Frequent front wheel slip

[TROUBLESHOOTING HINTS]

• Tire traction performance is extremely poor for given road friction. (electronic 4WD system is normal.)

• Improper wheel alignment (electronic 4WD system is normal.)

• Rear differential oil temperature is extremely high (Fail-safe condition)

• Differential oil temperature sensor malfunction (Fail-safe condition)

• Compare slip frequency with another vehicle of the same model (under the same road conditions and tire traction performance).

• Replace tires with others of the same model and perform test under the same road conditions to determine if the malfunction was caused by tire traction performance.

• Coupling component malfunction

• 4WD solenoid malfunction

Warning

• During simulation driving, vehicle stability may decrease extremely and cause an accident. Be sure to perform the simulation test driving in a safe area.

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 TIRE AIR PRESSURE • Inspect tire air pressure. (See WHEEL AND TIRE SPECIFICATION.) • Is it within specification?	Yes	Go to next step.
2		No	Adjust tire air pressure, then go to next step. (See WHEEL AND TIRE SPECIFICATION.)
3	COMPARE WITH SAME MODEL TIRES • Install tires of the same model. • Perform simulation driving. • Does malfunction recur?	Yes	Go to next step.
3		No	Electronic 4WD system is normal.
4	COMPARE WITH SAME MODEL VEHICLE • Install tires of malfunctioning vehicle to another same model vehicle. • Perform simulation driving. • Does malfunction recur?	Yes	Electronic 4WD system is normal.
4		No	Go to next step.
5	INSPECT 4WD SOLENOID • Inspect 4WD solenoid. (See 4WD SOLENOID INSPECTION.) • Is coupling component solenoid normal?	Yes	Inspect harness between 4WD solenoid and 4WD control module, then go to next step.
5		No	Replace coupling component. (See COUPLING COMPONENT REMOVAL/INSTALLATION.)
6	INSPECT WHEEL ALIGNMENT • Inspect wheel alignment. (See FRONT WHEEL ALIGNMENT.) (See REAR WHEEL ALIGNMENT.) • Is it normal?	Yes	Replace coupling component. (See COUPLING COMPONENT REMOVAL/INSTALLATION.)
6		No	Adjust wheel alignment if necessary. (See FRONT WHEEL ALIGNMENT.) (See REAR WHEEL ALIGNMENT.)