Circuit/System Testing
WARNING: This page is about a different car, the 2013 Cadillac XTS. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition OFF and all vehicle systems OFF, disconnect the X1 harness connector at the K73 Telematics Communication Interface Control Module. It may take up to 2 minutes for all vehicle systems to power down.
- Test for greater than 9.5 V between the B+ circuit terminal 14 and the low reference circuit terminal 13.
- If 9.5 V or less
Test or replace the C3 Telematics Communication Interface Control Module Battery.
- If greater than 9.5 V
- If 9.5 V or less
- Replace the K73 Telematics Communication Interface Control Module .