Toyota Tundra Service Manual: 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.
    Road Test

    System Diagram

    See More:

    Toyota Tundra Service Manual > Automatic Transmission System: Transmission Range Sensor Circuit Malfunction (PRNDL Input) (P0705)
    DESCRIPTION The Park/Neutral Position (PNP) switch detects the shift lever position and sends signals to the ECM. DTC Code DTC Detection Condition Trouble Area P0705 One of the following conditions is met: (A) Any 2 or more of the following signals are ON simultaneously (2-trip detection logic): One ...

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