Toyota 4Runner: System Description
SYSTEM DESCRIPTION
1. SYSTEM DESCRIPTION
(a) The Electronic Controlled Automatic Transmission (ECT) is an automatic transmission that electronically controls shift timing using the Engine Control Module (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 is reduced by controlling the engine and transmission simultaneously.
In addition, the ECT has the following features:
- Diagnostic function.
- Fail-safe function when a malfunction occurs.
System Diagram
SYSTEM DIAGRAM
The configuration of the electronic control system for the A750E automatic transmission
is as shown in the following chart.
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How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT
HINT:
The ECM is connected to the CAN communication system. Therefore, before
starting troubleshooting, make sure to check that there is no trouble in
the CAN ...
Other materials about Toyota 4Runner:
CD cannot be Inserted / Played or CD is Ejected Right After Insertion
PROCEDURE
1.
CHECK IF A PROPER CD IS INSERTED
(a) Make sure that the CD is an audio CD or a CD with an MP3, WMA or AAC file,
and that it is not deformed, flawed, stained, deteriorated or otherwise defective.
OK:
CD is nor ...
Unable to Unlock Steering Wheel (Engine cannot Start)
DESCRIPTION
The power management control ECU supplies the power to activate the motor of
the steering lock actuator assembly.
The steering lock actuator activates the steering lock motor and moves the lock
bar into the steering column to lock the steerin ...
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