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 DETECTION CONDITION CHART

DTC No.	DTC Detection Condition	Trouble Area
C1299/99	When one of the following conditions is met: Condition that controls coupling calorific value is predefined value or more. Vehicle is driven and energy load tire radius difference between front tires and rear tires is more than 3%.	Tire size 4WD control ECU