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Home >> Toyota >> 2009 >> Matrix Base, Automatic >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 13 (Transfer Case MF1A/4WD/AWD) >> Active Torque Control 4WD System >> Fail-Safe Chart
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Fail-Safe Chart

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  1. FAIL-SAFE FUNCTION 
    • If the following malfunctions occur, the 4WD control ECU will stop the function of 4WD control system or partly change the function to control the system.
    • If a malfunction occurs in the sensor signal or actuator, the flow of electricity to the linear solenoid of the electromagnetic control coupling is prohibited. As a result, the system enters front wheel drive condition.
    • When a component of the system malfunctions and the fail-safe function activate, the component operation is prohibited. However, if the system is controlling the component and the fail-safe function activates, the system operation is gradually stopped to prevent sudden changes in the vehicle condition.
    • When system control is not possible, the warning light is illuminated to stop operation of the system operation.
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