AutoCodes – Cadillac – C1115 Cadillac

C1115 Cadillac Code - Manual Trailer Brake Apply Request Switch Signal

Quick Answer

The trailer brake control system has a control panel with the trailer gain and manual apply switches. Common causes include Faulty Trailer Brake Control Switch, Trailer Brake Control Switch harness is open or shorted, Trailer Brake Control Switch 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
C1115 Cadillac indicates Manual Trailer Brake Apply Request Switch Signal.
Common causes
Common causes include Faulty Trailer Brake Control Switch, Trailer Brake Control Switch harness is open or shorted, Trailer Brake Control Switch 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 984
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Jul 18, 2023
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Code C1115 Cadillac Description

The trailer brake control system has a control panel with the trailer gain and manual apply switches. The switches are located on the instrument panel to the left of the steering column. The control panel and switches allow you to adjust the amount of output, referred to as trailer gain, available to the electric trailer brakes and allow you to manually apply the trailer brakes. The trailer brake control panel and switches are used along with the trailer brake display page on the driver information center to adjust and display power output to the trailer brakes.
OBDII Code C1115 Cadillac - Manual Trailer Brake Apply Request Switch Signal - AutoCodes.com
C1115 Cadillac Code - Manual Trailer Brake Apply Request Switch Signal

What are the Possible Causes of the DTC C1115 Cadillac?

  • Faulty Trailer Brake Control Switch
  • Trailer Brake Control Switch harness is open or shorted
  • Trailer Brake Control Switch circuit poor electrical connection
  • Faulty Chassis Control Module-Auxiliary

How to Fix the DTC C1115 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.

Code Tech Notes

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the C1115 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 C1115 Cadillac Code

1. What are common symptoms of OBDII code C1115 in a Cadillac related to the Manual Trailer Brake Apply Request Switch Signal?

- Common symptoms include the trailer brake system not working properly, the trailer brakes applying unexpectedly, or the trailer brake indicator light staying on.

2. What can cause the OBDII code C1115 in a Cadillac related to the Manual Trailer Brake Apply Request Switch Signal?

- This code is often caused by a faulty manual trailer brake apply request switch, damaged wiring in the trailer brake system, or a malfunctioning trailer brake control module.

3. How can I diagnose the issue causing OBDII code C1115 in my Cadillac related to the Manual Trailer Brake Apply Request Switch Signal?

- To diagnose the issue, you can use a diagnostic scanner to retrieve the trouble code, inspect the manual trailer brake apply request switch for damage, and test the wiring and connections in the trailer brake system.

4. What are some repair tips for fixing OBDII code C1115 in a Cadillac related to the Manual Trailer Brake Apply Request Switch Signal?

- Repair tips may include replacing the manual trailer brake apply request switch, repairing any damaged wiring, or recalibrating the trailer brake control module.

5. Can I still drive my Cadillac with OBDII code C1115 related to the Manual Trailer Brake Apply Request Switch Signal?

- It is not recommended to drive the vehicle with this code present, as it may affect the trailer brake system's functionality and safety.

6. How much does it typically cost to repair OBDII code C1115 in a Cadillac related to the Manual Trailer Brake Apply Request Switch Signal?

- The cost of repair can vary depending on the exact cause of the issue, but it may involve replacement parts and labor, which could range from $100 to $500 or more.

7. Are there any safety concerns associated with OBDII code C1115 related to the Manual Trailer Brake Apply Request Switch Signal?

- Yes, there are safety concerns, as the trailer brake system may not function as intended, leading to potential issues with braking while towing a trailer.

8. Can I reset OBDII code C1115 related to the Manual Trailer Brake Apply Request Switch Signal myself?

- You can try clearing the code with a diagnostic scanner, but if the underlying issue is not addressed, the code may return. It's best to diagnose and fix the root cause of the problem.

9. How long does it typically take to repair OBDII code C1115 in a Cadillac related to the Manual Trailer Brake Apply Request Switch Signal?

- The repair time can vary based on the specific issue, but it may take a few hours to a full day to diagnose and fix the problem effectively.

10. Is OBDII code C1115 related to the Manual Trailer Brake Apply Request Switch Signal a common issue in Cadillacs?

- While not as common as some other OBDII codes, issues related to the Manual Trailer Brake Apply Request Switch Signal can occur in Cadillacs, particularly in models equipped with trailer brake systems.

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