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Home >> Cadillac >> 2021 >> CT4 Sport, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 191 (Data Communications - Diagnostic Information And Procedures (3 Of 3)) >> Diagnostic Information and Procedures >> DTC U3002 >> Circuit/System Description

Circuit/System Description

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When power up is commanded, the control module compares the VIN received via serial data from another control module to the VIN stored in memory.

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