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

Signals from the transmission control module (TCM) are converted into hydraulic functions in the electric valve control unit (7). See Fig 1. The RPM sensors (1, 12), starter interlock contact (9), and transmission oil temperature sensor (8) of the electric valve control unit (7) supply the TCM with input signals. The solenoid valves are controlled by the TCM and trigger the hydraulic functions.