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Home >> Jeep >> 2007 >> Commander Base, 3.7 K, AWD >> Repair and Diagnosis >> Transmission >> Transmission Control Systems >> Nag1 Automatic Transmission (Service Information) >> Nag1 - Service Information >> Unit-ELECTROHYDRAULIC >> Operation >> ELECTROHYDRAULIC Unit >> Electrical Control Unit

Electrical Control Unit

Fig 1: Identifying Electrical Control Unit Components
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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.