NO.1 FREQUENT FRONT WHEEL SLIP

id030300800400

1

Frequent front wheel slip

[TROUBLESHOOTING HINTS]

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

• Improper wheel alignment (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, AND 4WD SYSTEM DTCs
• Verify DSC, PCM, TCM, and 4WD system DTCs using WDS or equivalent.
• Are there any DTCs present?
Yes
Go to applicable DTC inspection.
No
Go to next step.
2
VERIFY TIRE AIR PRESSURE
• Inspect tire air pressure.
• Is it within specification?
Yes
Go to next step.
No
Adjust tire air pressure, then go to next step.

3

COMPARE WITH SAME MODEL TIRES
• Install tires of the same model.
• Perform simulation driving.
• Does malfunction recur?
Yes
Go to next step.
No
4WD system is okay.
4
COMPARE WITH SAME MODEL VEHICLE
• Install tires of malfunctioning vehicle to another same model vehicle.
• Perform simulation driving.
• Does malfunction recur?
Yes
4WD system is okay.
No
Go to next step.
5
INSPECT 4WD SOLENOID
• Inspect 4WD solenoid.
• Is coupling component solenoid okay?
Yes
Inspect harness between 4WD solenoid and 4WD CM, then go to next step.
No
Replace coupling component. (See COUPLING COMPONENT REMOVAL/INSTALLATION [L3].)
6
INSPECT WHEEL ALIGNMENT
• Inspect wheel alignment.
• Is it okay?
Yes
Replace coupling component. (See COUPLING COMPONENT REMOVAL/INSTALLATION [L3].)
No
Inspect wheel alignment, and adjust it if necessary.