Fail-Safe Chart

MF1A TRANSFER / 4WD / AWD: ACTIVE TORQUE CONTROL 4WD SYSTEM: FAIL-SAFE CHART

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.