Fail-Safe Chart

U340E AUTOMATIC TRANSAXLE: AUTOMATIC TRANSAXLE SYSTEM: FAIL-SAFE CHART

FAIL-SAFE CHART

1. FAIL-SAFE
(a) This function minimizes the loss of ECT functions when any malfunction occurs in the sensors or solenoids.






(b) Fail-safe chart for shift solenoid valve S1 and/or S2:
Fail safe function:
If either of the shift solenoid valve circuits develops an open or short, the ECM turns the other shift solenoid ON or OFF in order to shift into the gear positions shown in the table below.
Manual shifting as shown in the following table must be done (In case of a short circuit, the ECM stops sending the current to the short circuit solenoid).
Even if starting the engine in fail-safe mode, the gear position remains in the same position.

Normal:





Shift Solenoid Valve S1 malfunction:





X: Malfunctions

Shift Solenoid Valve S2 malfunction:





X: Malfunctions

Shift Solenoid Valve S1 and S2 malfunction:





X: Malfunctions