AutoCodes – GMC – B3462 GMC

B3462 GMC Code - Right Rear Window Down Switch 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: B3462 GMC indicates Right Rear Window Down Switch 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 462

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 B3462 GMC 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 B3462 GMC - Right Rear Window Down Switch Circuit Low - AutoCodes.com — B3462 GMC Code - Right Rear Window Down Switch Circuit Low

What does this mean?

What are the Possible Causes of the DTC B3462 GMC?

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 Right Rear Door Module (RRDM)
Faulty Driver Door Module (DDM)

How to Fix the DTC B3462 GMC?

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 B3462 GMC 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 B3462 GMC Code

1. What does OBDII code B3462 mean for GMC vehicles?

Code B3462 indicates a low voltage issue in the right rear window down switch circuit, often due to a wiring problem, faulty switch, or control module issue.

2. What are the common symptoms of code B3462 on GMC vehicles?

Symptoms include the right rear window not rolling down, intermittent operation, or unresponsiveness when using the window switch.

3. What causes the B3462 code to appear?

Common causes include a faulty right rear window switch, damaged wiring or connectors, a malfunctioning window motor, or an issue with the body control module (BCM).

4. Can a blown fuse trigger the B3462 code?

Yes, a blown fuse in the window circuit can cause low voltage and may trigger the B3462 code.

5. How do I diagnose the B3462 code on my GMC vehicle?

Start by inspecting the right rear window switch, checking the wiring and connectors for damage, and testing the voltage at the switch. Use a scan tool to confirm the code and assess related data.

6. Can I still use my GMC if the B3462 code is active?

Yes, you can still drive the vehicle, but the right rear window may not function properly. Itâ€™s best to address the issue promptly to avoid further electrical problems.

7. How do I fix the B3462 code on a GMC?

Repairs may include replacing the right rear window switch, repairing or replacing damaged wiring, or addressing issues with the BCM or window motor.

8. How much does it cost to fix code B3462 on a GMC vehicle?

The cost varies depending on the root cause. Replacing a window switch may cost $50-$150, while more extensive electrical repairs could cost $200-$500 or more.

9. Can I clear the B3462 code without repairs?

While you can clear the code with a scan tool, it will likely return if the underlying issue is not resolved.

10. Is the B3462 code specific to GMC vehicles?

While the code description applies to GMC vehicles, similar codes may appear in other makes with slightly different naming conventions. Always refer to your vehicleâ€™s manual for specifics.