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Home >> Cadillac >> 2021 >> CT4 Sport, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 15 (Cellular, Entertainment, And Navigation - Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> OnStar Button Malfunction >> Diagnostic Aids

Diagnostic Aids

WARNING: This page is about a different car, the 2022 Cadillac CT4. However, it is still accessible from the selected car via links, so may be relevant.

After any repair is made to the 10 V reference circuit or button signal circuit the fuse to the K73 Telematic Control Module must be removed for 30 s to reset the control module. Failure to do so could result in incorrect diagnosis.

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