Toyota Sienna Service Manual: System description
1. SYSTEM DESCRIPTION
(a) The ECT (Electronic controlled automatic transmission/transaxle) is an automatic transmission/transaxle that electronically controls shift timing using the ECM. The ECM detects electrical signals that indicate engine and driving conditions, and controls the shift point, based on driver habits and road conditions. As a result, fuel efficiency and power transmission performance are improved.
Shift shock has been reduced by controlling the engine and transmission simultaneously.
In addition, the ECT has features such as follows:
- Diagnostic function.
- Fail-safe function when a malfunction occurs.
Definition of terms
Term
Definition
Monitor description
Description of what the ecm monitors and how it detects malfunctions
(monitoring purpose and its details).
Related dtcs
Diagno ...
How to proceed with troubleshooting
Hint:
The ecm of this system is connected to the can and
multiplex communication system. Therefore, before
starting troubleshooting, make sure to check that there is
no trouble in the can an ...
Other materials:
Automatic transaxle unit
COMPONENTS
...
Removal
1. REMOVE V-BANK COVER SUB-ASSEMBLY (See
page EM-28)
2. DISCONNECT VENTILATION HOSE
(a) Disconnect the ventilation hose from the ventilation
valve.
3. REMOVE VENTILATION VALVE
(a) Remove the ventilation valve. ...
If a warning message is displayed
If a warning message is shown on the multi-information display,
stay calm and perform the following actions:
Master warning light
The master warning light also comes on or flashes in order to indicate that
a message is currently being displayed on the multi-information display.
Multi- ...
