Headlamp Control Module/Headlamp Leveling Control Module Lost Communication With Left Headlamp On LIN Bus
Table of contents
U1511 CADILLAC Possible Causes
- Faulty Left Headlamp
- Left Headlamp harness is open or shorted
- Left Headlamp circuit poor electrical connection
- Faulty Headlamp Control Module/Headlamp Leveling Control Module
How do I fix code U1511 CADILLAC?
Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector’s pins.
Cost of diagnosing the U1511 CADILLAC code
The cost of diagnosing the U1511 CADILLAC code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle’s make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.
Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
U1511 CADILLAC Description
The Local Interconnect Network (LIN) Bus consists of a single wire with a transmission rate of 10.417 Kbit/s. The serial data is transmitted over a LIN circuit between a master control module and other LIN devices within a particular subsystem. If serial data communication is lost between any of the LIN devices on the LIN bus network, the master control module will set a no communication code against the non-communicating LIN device. The Diagnostic Trouble Code (DTC) will set when a supervised periodic message to Headlamp Control Module/Headlamp Leveling Control Module from Left Headlamp has not been received.