Toyota Venza: Cancellation of 4WD Control (C1299/99)

Toyota Venza Service Manual / Mf1a Transfer / 4wd / Awd / Active Torque Control 4wd System / Cancellation of 4WD Control (C1299/99)

DESCRIPTION

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 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 AWD control ECU

CAUTION / NOTICE / HINT

HINT:

Check the condition of each related circuit connector before troubleshooting (See page ).

PROCEDURE

1.	CHECK TIRE CONDITION

(a) Check the size and condition of all 4 tires (See page ).

HINT:

This DTC is output when tire deformation or a difference in tire size is detected.

OK:

The diameter and air pressure of all 4 tires are the same.

REPLACE TIRE SO THAT ALL 4 TIRES ARE THE SAME IN SIZE

2.	RECONFIRM DTC

(a) Clear the DTC (See page ).

(b) Start the engine.

Result	Proceed to
DTC is output	A
DTC is not output	B

REPLACE AWD CONTROL ECU

CHECK INTERMITTENT PROBLEMS

Malfunction in Deceleration Sensor (C1245/93)

DESCRIPTION If a malfunction in the deceleration sensor circuit occurs, the AWD control ECU will output this DTC. DTC No. DTC Detecting Condition Trouble Area ...

ABS Malfunction (C1296/96)

DESCRIPTION If a malfunction in the speed sensor signal circuit occurs, the AWD control ECU will output this DTC. DTC No. DTC Detecting Condition Trouble Area ...

Other materials about Toyota Venza:

On-vehicle Inspection
ON-VEHICLE INSPECTION CAUTION / NOTICE / HINT CAUTION: Be sure to follow the correct removal and installation procedures of the front airbag sensor. PROCEDURE 1. INSPECT FRONT AIRBAG SENSOR (VEHICLE NOT INVOLVED IN COLLISION) (a) Perform a diagnostic s ...

Front Passenger Side Door Entry Unlock Function does not Operate
DESCRIPTION If the front passenger door entry lock function operates normally, but its entry unlock function does not, this means that the request code from the front passenger door is being output normally. In this case, a malfunction in the touch sensor ...

On-vehicle Inspection
ON-VEHICLE INSPECTION PROCEDURE 1. INSPECT SPEEDOMETER (a) Check the operation. (1) Using a speedometer tester (calibrated chassis dynamometer), check the speedometer indication according to the table below. Reference: Chassis Dynamometer In ...