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 ...

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Precaution
PRECAUTION 1. INITIALIZATION NOTICE: Perform the Registration (VIN registration) when replacing the ECM (See page ). HINT: Reset memory or initialization cannot be completed by only disconnecting and reconnecting the cable of the negative (-) battery ...