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Home >> GMC >> 2018 >> Acadia Denali, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 323 (Data Communication System - Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC U1653: Chassis Systems High Speed Communication Enable Circuit >> Circuit/System Description

Circuit/System Description

WARNING: This page is about a different car, the 2017 GMC Acadia. However, it is still accessible from the selected car via links, so may be relevant.

The Body Control Module (BCM) activates the ignition circuit, when the vehicle power mode is in ACCESSORY mode or Ignition ON/Vehicle In Service mode. The ignition circuit wakes up the devices for serial data bus communication.

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