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Home >> GMC >> 2020 >> Acadia SL >> Repair and Diagnosis >> Electrical >> Charging Systems >> Battery, Starting System And Charging System >> Diagnostic Information and Procedures >> Stop/Start System Malfunction >> Circuit/System Description

Circuit/System Description

For an overview of the component/system, refer to: Stop/Start System Description and Operation (KL9) 

Component Description
K9 Body Control Module Depending on the version, the control module can support different functions:
  • Power Mode Control
  • Stop/Start System

The control module also reads various switches and sensors and makes their values available via serial data.
K20 Engine Control Module The control module contains a microprocessor used to process input data to control outputs.
T19 Power Supply Transformer The device serves as a voltage stabilizer for several vehicle systems by compensating the voltage drop that the starter motor causes while starting the engine.