Fail-Safe Table

This function minimizes the loss of the ECT functions when any malfunction occurs in a sensor or solenoid.

Fig 1: Fail-Safe Table

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fail Safe Function:

If either of the shift solenoid valve circuits has an open or short failure, the ECM turns the other shift solenoid "ON" and "OFF" in order to shift into the gear positions shown in Fig 2and Fig 3.

In case of a short circuit, the ECM stops sending current to the short circuited solenoid.

Even if starting the engine again in the fail-safe mode, the gear position remains in the same position.

O: ON

X: OFF

->: Condition in the electrical malfunction is shown on the left of "->".

Condition in the fail-safe mode is shown on the right of "->".

(E/B): Engine brake.

Fig 2: Fail Safe Function Table (1 Of 2)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

O: ON

X: OFF

->: Condition in the electrical malfunction is shown on the left of "->".

Condition in the fail-safe mode is shown on the right of "->".

(E/B): Engine brake.

Fig 3: Fail Safe Function Table (2 Of 2)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002