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U1509 Cadillac Code - HVAC Controls Info Display Module Lost Communication With HVAC Control Module On LIN Bus

- Code Popularity: 352 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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By AutoCodes.com - Updated May 31, 2020
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|Code U1509 Cadillac Possible Causes

  • Faulty Heating, Ventilation, and Air Conditioning (HVAC) Control Module
  • HVAC Control Module harness is open or shorted
  • HVAC Control Module circuit poor electrical connection
  • Faulty HVAC Controls Info Display Module

|How do I Fix the Code U1509 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.

Does your Cadillac have Safety Recalls? → Check here

|What is the Cost to Diagnose the Code U1509 Cadillac?

Labor: 1.0

The cost of diagnosing the U1509 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.

|What are Code U1509 Cadillac Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

|Code U1509 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 Heating, Ventilation, and Air Conditioning (HVAC) Controls Info Display Module from HVAC Control Module has not been received.

OBDII Code U1509 Cadillac - HVAC Controls Info Display Module Lost Communication With HVAC Control Module On LIN Bus - AutoCodes.com
U1509 Cadillac Code - HVAC Controls Info Display Module Lost Communication With HVAC Control Module On LIN Bus

|Need More Information on the U1509 Cadillac Code?

Need more information on how to fix the U1509 Cadillac code? Get Access to Factory Service Manuals

|Need Help with the U1509 Cadillac Code?

Get the U1509 Cadillac code diagnosed by a professional: Find a repair shop in your area

|Code U1509 Cadillac comments

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