AutoCodes – Cadillac – U1170 Cadillac

U1170 Cadillac Code - Lost Communications With Driver Door Switch Assembly

Quick Answer

Modules connected to the class 2 serial data circuit monitor for serial data communications during normal vehicle operation. Common causes include Faulty Driver Door Switch Assembly, Driver Door Switch Assembly harness is open or shorted, Driver Door Switch Assembly circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: U1170 Cadillac indicates Lost Communications With Driver Door Switch Assembly.
Common causes: Common causes include Faulty Driver Door Switch Assembly, Driver Door Switch Assembly harness is open or shorted, Driver Door Switch Assembly circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 660

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Apr 24, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U1170 Cadillac Description

Modules connected to the class 2 serial data circuit monitor for serial data communications during normal vehicle operation. Operating information and commands are exchanged among the modules. When a module receives a message for a critical operating parameter, the module records the identification number of the module which sent the message for the state of health monitoring/node alive messages. A critical operating parameter is one which, when not received, requires that the module use a default value for that parameter. Once an identification number is learned by a module, it will monitor for that module node alive message. Each module on the class 2 serial data circuit is required to send a Node Alive message every 2 seconds. When no message is detected from a learned identification number for 5 seconds, a Diagnostic Trouble Code (DTC) U1170 is set.

OBDII Code U1170 Cadillac - Lost Communications With Driver Door Switch Assembly - AutoCodes.com — U1170 Cadillac Code - Lost Communications With Driver Door Switch Assembly

What does this mean?

What are the Possible Causes of the DTC U1170 Cadillac?

Faulty Driver Door Switch Assembly
Driver Door Switch Assembly harness is open or shorted
Driver Door Switch Assembly circuit poor electrical connection

How to Fix the DTC U1170 Cadillac?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the U1170 Cadillac code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about U1170 Cadillac Code

1. What are the common symptoms of OBDII code U1170 Cadillac related to Lost Communications With Driver Door Switch Assembly?

- Common symptoms include malfunctioning power windows, door locks not working properly, and issues with interior lights.

2. What are some possible causes of the U1170 Cadillac trouble code?

- Causes may include a faulty driver door switch assembly, damaged wiring or connectors, or a communication error within the vehicle's network.

3. How can I diagnose the U1170 code related to Lost Communications With Driver Door Switch Assembly?

- Diagnosis typically involves using a diagnostic scan tool to retrieve the trouble code, checking the wiring and connectors for damage, and testing the driver door switch assembly for proper functionality.

4. Can I still drive my Cadillac with the U1170 trouble code present?

- While it may be possible to drive the vehicle with this code, it is recommended to address the issue promptly to ensure proper functioning of essential features like power windows and door locks.

5. What are some repair tips for fixing the U1170 Cadillac trouble code?

- Repair tips may include checking and repairing any damaged wiring, replacing the driver door switch assembly if necessary, and ensuring all connections are secure.

6. Is it safe to attempt repairing the U1170 code on my own, or should I seek professional help?

- Depending on your experience and comfort level with automotive repairs, you may be able to address the issue yourself by following repair guides and utilizing the necessary tools. However, if unsure, it's best to seek professional help.

7. Are there any recalls or service bulletins related to the U1170 trouble code in Cadillac vehicles?

- It's recommended to check with your local Cadillac dealership or visit the NHTSA website to see if there are any recalls or service bulletins related to the U1170 trouble code in your specific Cadillac model.

8. Can extreme weather conditions affect the occurrence of the U1170 trouble code?

- Extreme weather conditions, such as extreme cold or heat, can potentially impact the electrical components of the driver door switch assembly and contribute to the U1170 trouble code.

9. How much does it typically cost to repair the U1170 Cadillac trouble code?

- The cost of repairing the U1170 trouble code can vary depending on the underlying cause, parts needed, and labor rates. It's advisable to obtain quotes from reputable repair shops or dealerships.

10. Will resetting the trouble code make it go away permanently, or is it likely to reappear?

- Resetting the trouble code may temporarily clear the issue, but if the root cause is not addressed, it is likely to reappear. It's important to diagnose and repair the underlying problem to prevent recurrence.