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Home >> Jaguar >> 1992 >> Sovereign L6-4.0L >> Repair and Diagnosis >> Powertrain Management >> Transmission Control Systems >> Relays and Modules - Transmission and Drivetrain >> Relays and Modules - A/T >> Control Module >> Description and Operation >> Transmission Control Module
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Transmission Control Module


PURPOSE
The Transmission Control Module (TCM) receives the following information from the ECM:
- Engine speed signal from ECM
- Throttle opening (from the throttle position potentiometer)

The information is used by the TCM to determine when a gear change is required.
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