Transmission Control System

Powertrain Control Module:

Transmission Control Electrical Components:

Data Link Connector (DLC):

DESCRIPTION
The Powertrain Control Module (PCM) is an electronic device which monitors various inputs to control various transmission functions including shift quality and transmission diagnostics. The PCM receives various input information from sensors, switches, and components to process for use within its control program. Based on this input information, the PCM controls various transmission output functions and devices.

INPUT INFORMATION
The PCM uses the following information sensors to gather data for electronically controlling transmission functions:

- Transmission Fluid Temperature (TFT) sensor.
- Transmission Range (TR) pressure switch assembly.
- Engine Coolant Temperature (ECT) sensor.
- Throttle Position (TP) sensor.
- Vehicle Speed Sensor (VSS).
- Brake switch.

OUTPUT INFORMATION
Based on input information, the PCM controls various transmission output functions and devices.

- 1-2 shift solenoid.
- 2-3 shift solenoid,
- 3-2 control solenoid.
- Pressure Control Solenoid (PCS).
- [1][2]Torque Converter Clutch (TCC) solenoid.
- TCC Pulse Width Modulated (PWM) solenoid.

DATA LINK CONNECTOR (DLC)
This connector is a multiple cavity connector. The Data Link Connector (DLC) provides the technician a means of accessing serial data for aid in diagnosis. The DLC allows the technician to use a scan tool to monitor various Systems and display DTC codes. The DLC connector is located within the driver's compartment, normally on the left side near the steering column.