DTC C12D2 GMC
No Communication With Vehicle Interface Unit
No Communication With Vehicle Interface Unit
Description
Key on, and a message from a learned ID number was not detected for the five seconds. Modules on the Class 2 circuit monitor for data communications during vehicle operation. When a module receives a message for critical data, the module records the ident
Cause and Solution
VIU Class 2 circuit is open, shorted to ground or to B+VIU ignition power circuit has a high resistance conditionVIU main ground circuit(s) has a high resistance conditionVIU (module) may have failed and is pulling the circuit low
Video Guide
Diagnostic Info
- DTC Code: C12D2
- Brand: GMC