AutoCodes – Cadillac – B3147 Cadillac

B3147 Cadillac Code - Right Front Unlock Switch Circuit Low

Quick Answer

The switch that failed and generated the Diagnostic Trouble Code (DTC) is wired to either the Driver Door Switch Assembly (DDSA) or the Passenger Front Door Module (PDM). Common causes include Faulty Right Front Power Door Lock Switch, Right Front Power Door Lock Switch harness is open or shorted, Right Front Power Door Lock 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: B3147 Cadillac indicates Right Front Unlock Switch Circuit Low.
Common causes: Common causes include Faulty Right Front Power Door Lock Switch, Right Front Power Door Lock Switch harness is open or shorted, Right Front Power Door Lock 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 455

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 Mar 04, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B3147 Cadillac Description

The switch that failed and generated the Diagnostic Trouble Code (DTC) is wired to either the Driver Door Switch Assembly (DDSA) or the Passenger Front Door Module (PDM). When a door lock switch is activated to the Lock or Unlock function, the DDSA or PDM receives the switch input and sends the information on, via the Serial Data Class 2 communications line, to the Rear Integration Module (RIM), which is the master of all lock operations. If the RIM determines that the message is a valid request and conditions are correct for a door lock function to occur, it sends its OK back to all the door modules to Lock or Unlock the doors. Each door module supplies power and ground to its associated lock actuator to Lock or Unlock the associated door.

OBDII Code B3147 Cadillac - Right Front Unlock Switch Circuit Low - AutoCodes.com — B3147 Cadillac Code - Right Front Unlock Switch Circuit Low

What does this mean?

What are the Possible Causes of the DTC B3147 Cadillac?

Faulty Right Front Power Door Lock Switch
Right Front Power Door Lock Switch harness is open or shorted
Right Front Power Door Lock Switch circuit poor electrical connection
Faulty Passenger Front Door Module (PDM)

How to Fix the DTC B3147 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 B3147 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 B3147 Cadillac Code

1. What are the common symptoms of OBDII code B3147 Cadillac (Right Front Unlock Switch Circuit Low)?

The common symptoms include the right front door not unlocking with the switch, malfunctioning power door locks, and possibly an illuminated warning light on the dashboard.

2. What can cause the OBDII code B3147 Cadillac to trigger?

The code B3147 is typically triggered by a malfunction in the wiring or connectors related to the right front door unlock switch circuit.

3. How can I diagnose the cause of the Right Front Unlock Switch Circuit Low code?

You can start by checking the wiring and connectors for any damage or corrosion. It's also recommended to test the unlock switch itself for proper functionality.

4. Can a faulty right front door lock actuator cause the B3147 code?

Yes, a faulty door lock actuator can potentially trigger the B3147 code if it is affecting the circuitry of the right front unlock switch.

5. What are the repair options for resolving the B3147 Cadillac trouble code?

Repair options may include repairing or replacing damaged wiring or connectors, fixing the right front door unlock switch, or replacing the door lock actuator if necessary.

6. Are there any safety concerns associated with the B3147 code?

While the code itself may not pose an immediate safety risk, it's important to address the underlying issue promptly to ensure proper functioning of the right front door lock, especially in emergency situations.

7. Can I drive my Cadillac with the B3147 trouble code present?

If the right front door lock is still operational through other means (e.g., key fob), it may be safe to drive the vehicle, but it's recommended to address the issue as soon as possible.

8. Is it possible to reset the B3147 code without fixing the underlying problem?

Resetting the code without addressing the root cause will likely result in the code reappearing once the system detects the issue again.

9. How can I prevent the B3147 code from recurring in the future?

Regularly inspecting and maintaining the door lock components, as well as ensuring the wiring and connectors are in good condition, can help prevent the B3147 code from recurring.

10. Does the B3147 Cadillac code affect other vehicle functions?

While the code specifically relates to the right front unlock switch circuit, it's essential to address the issue promptly to prevent any potential impact on other electrical systems in the vehicle.