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Home >> Buick >> 2017 >> Cascada Base >> Repair and Diagnosis >> Engine Performance >> System >> Data Communication System >> Diagnostic Information and Procedures >> DTC U1653 >> Circuit/System Description

Circuit/System Description

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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