Cadillac U1814: Powertrain High Speed Communication Enable Circuit
Is your scanner showing Cadillac U1814?
No worries. We'll show you what it means and how to deal with it.
Cadillac U1814: Powertrain High Speed Communication Enable Circuit
OVERVIEWWhat Does The Cadillac U1814 Code Mean?
The system voltage is between 9-16 volts. The vehicle power mode master requires serial data communication to occur.
How Can You Fix The Cadillac U1814 Code?
- Use the DMM MIN/MAX function to capture/locate intermittent conditions.
- Short to ground may also set multiple no communication codes for GMLAN high speed modules.
Recommended Parts
Below are some recommended auto parts to help you address the trouble code affecting your vehicle and get it running smoothly again:
>>> WORKPRO 582-piece Crimp Terminals, Wire Connectors, Heat Shrink Tube, Electrical Repair Kit
>>> Dorman 86689C 399 PC Automotive Electrical Repair Kit
Note: During the purchasing process, please check carefully whether the part you want to buy fits your car!
Reference Sources
- GM, 2014, Service Bullettin – Unable to Clear BCM DTCs After Completing Repair.
- GM, 2015, Service Bullettin – Diagnostic Tips – Diagnosing High Speed LAN Concerns.
