AutoCodes – Cadillac – B3517 Cadillac

B3517 Cadillac Code - Left Rear Window Express Down Circuit Low

Quick Answer

The window switch or window switch circuits that generate this Diagnostic Trouble Code (DTC) are built-in parts of the Driver Door Switch Assembly (DDSA). Common causes include Faulty Driver Door Switch Assembly (DDSA), Driver Door Switch Assembly (DDSA) harness is open or shorted, Driver Door Switch Assembly (DDSA) 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: B3517 Cadillac indicates Left Rear Window Express Down Circuit Low.
Common causes: Common causes include Faulty Driver Door Switch Assembly (DDSA), Driver Door Switch Assembly (DDSA) harness is open or shorted, Driver Door Switch Assembly (DDSA) 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 506

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on Mar 06, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B3517 Cadillac Description

The window switch or window switch circuits that generate this Diagnostic Trouble Code (DTC) are built-in parts of the Driver Door Switch Assembly (DDSA). There are no external circuits. The DDSA internally supplies power and ground to the contacts of each of the integral window switches. When one of the switches is operated, the switch contacts close, providing the DDSA with a specific window switch signal. The DDSA processes this signal, assigns a digital message to it, and sends the message to the appropriate Driver Door Module (DDM), Passenger Front Door Module (PDM), Left Rear Door Module (LRDM), or Right Rear Door Module (RRDM), via the class 2 serial data circuit. The door module, upon receiving the message, examines other relevant information available on the class 2 serial data line in order to determine if conditions are correct for window operation to occur. If conditions are correct, the door module applies power and ground to the associated window motor and circuits in order to move the window. If the DDSA determines that one of its built in window switches is closed for more than 15 continuous seconds, it sets the DTC.

OBDII Code B3517 Cadillac - Left Rear Window Express Down Circuit Low - AutoCodes.com — B3517 Cadillac Code - Left Rear Window Express Down Circuit Low

What does this mean?

What are the Possible Causes of the DTC B3517 Cadillac?

Faulty Driver Door Switch Assembly (DDSA)
Driver Door Switch Assembly (DDSA) harness is open or shorted
Driver Door Switch Assembly (DDSA) circuit poor electrical connection
Faulty Left Rear Door Module (LRDM)
Faulty Driver Door Module (DDM)

How to Fix the DTC B3517 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 B3517 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 B3517 Cadillac Code

1. What does the OBDII code B3517 mean on a Cadillac?

The code B3517 indicates a problem with the Left Rear Window Express Down Circuit, specifically that the circuit is experiencing a low voltage condition.

2. What are the common symptoms of the B3517 code?

Symptoms include the left rear window not operating properly, failure of the express down feature, or the window being stuck in one position.

3. What causes the B3517 code to appear?

Common causes include a faulty window switch, damaged wiring or connectors in the left rear window circuit, or a malfunctioning window motor.

4. Can a blown fuse cause the B3517 code?

Yes, a blown fuse in the circuit can lead to a low voltage condition and trigger the B3517 code.

5. How do I diagnose the B3517 code on my Cadillac?

Start by checking the window switch and motor for proper operation, inspect the wiring and connectors for damage or loose connections, and test for proper voltage in the circuit.

6. Is the B3517 code serious?

While it wonâ€™t affect drivability, it may hinder window operation and should be repaired to restore full functionality and prevent further electrical issues.

7. Can I fix the B3517 code myself?

If youâ€™re comfortable with basic electrical troubleshooting, you can inspect and repair damaged wiring or replace a faulty switch. More complex issues may require professional help.

8. How much does it cost to repair the B3517 code?

Repair costs depend on the root cause but typically range from $50 to $300, depending on whether you need a new switch, motor, or wiring repairs.

9. Will clearing the code fix the B3517 issue?

Clearing the code without addressing the underlying issue will only temporarily remove it. The code will reappear if the problem isnâ€™t resolved.

10. Can the weather affect the B3517 code?

Yes, moisture or corrosion in the wiring or connectors can contribute to electrical issues and trigger the code, especially in wet or humid conditions.