Fail-Safe Chart

A340E AUTOMATIC TRANSMISSION: AUTOMATIC TRANSMISSION SYSTEM: FAIL-SAFE CHART

1. FAIL-SAFE

This function minimizes the loss of the ECT (Electronic Controlled automatic Transmission) functions when a malfunction occurs in a sensor or solenoid.





*1: AI (Artificial Intelligence)-SHIFT control

In addition to switching of the shift pattern through the pattern select switch, the AI-SHIFT control enables the ECM to estimate the road conditions and the driver's intention in order to automatically select the optimal shift pattern.

2. 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 the table below.

When a short circuit occurs, the ECM cuts the supply of current to the short circuited solenoid.

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





X: Malfunctions