Electrical Control Unit

Fig 1: Identifying Electrical Control Unit Components

Courtesy of DAIMLERCHRYSLER CORP.

1 - N3 SPEED SENSOR

2 - PLUG CONNECTOR

3 - MODULATING PRESSURE REGULATING SOLENOID

4 - SHIFT PRESSURE REGULATING SOLENOID

5 - 1-2/4-5 SHIFT SOLENOID

6 - 3-4 SHIFT SOLENOID

7 - ELECTRICAL CONTROL UNIT

8 - TRANSMISSION TEMPERATURE SENSOR

9 - STARTER INTERLOCK CONTACT

10 - 2-3 SHIFT SOLENOID

11 - TORQUE CONVERTER LOCK-UP SOLENOID

12 - N2 SPEED SENSOR

The electric valve control unit (7) consists of a plastic shell which houses the RPM sensors (1,12), regulating solenoid valves (3, 4), solenoid valves (5, 6, 10), the TCC solenoid valve (11), the park/neutral contact (9), and the transmission oil temperature sensor (8). Conductor tracks integrated into the shell connect the electric components to a plug connection (2). This 13-pin plug connection (2) establishes the connection to the vehicle-side cable harness and to the transmission control module (TCM). With the exception of the solenoid valves, all other electric components are fixed to the conductor tracks. See Fig 1.