DTC C1299/99: Cancellation of 4WD Control: Description

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If wheel slip continues, differential control will be disabled when the torque-distribution ratio of the differential clutch exceeds the set value and a malfunction in the output of the wheel speed sensors, etc. occurs.
If a difference in diameter between the front and rear wheels is determined, differential control will be disabled.

DTC DETECTING CONDITION AND TROUBLE AREA REFERENCE

DTC No.	DTC Detecting Condition	Trouble Area
C1299/99	When either of the following are detected: The torque-distribution ratio of the differential clutch exceeds the set value. The vehicle is driven with tires different in size between the front and rear.	Tire size 4WD control ECU