B3650 2017 GMC Sierra Code - High Beam Request Signal Circuit Performance Signal Invalid
Quick Answer
The B3650 diagnostic trouble code (DTC) for a 2017 GMC Sierra indicates that there is an issue with the High Beam Request Signal Circuit Performance Signal being invalid. Common causes include Faulty high beam switch, Wiring or connection issues in the high beam request circuit, Defective high beam relay. 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
- B3650 2017 GMC Sierra indicates High Beam Request Signal Circuit Performance Signal Invalid.
- Common causes
- Common causes include Faulty high beam switch, Wiring or connection issues in the high beam request circuit, Defective high beam relay.
- 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 B3650 2017 GMC Sierra Description
The B3650 diagnostic trouble code (DTC) for a 2017 GMC Sierra indicates that there is an issue with the High Beam Request Signal Circuit Performance Signal being invalid. This code is typically triggered when the control module detects that the signal being received from the high beam request circuit does not match the expected values. The high beam request signal is crucial for activating the high beam headlights when needed, so any malfunction in this circuit can affect the vehicle's lighting system.
Common Causes of B3650 2017 GMC Sierra
- Faulty high beam switch.
- Wiring or connection issues in the high beam request circuit.
- Defective high beam relay.
- Malfunctioning control module.
- Water or corrosion damage in the high beam circuit.
Symptoms of B3650 2017 GMC Sierra
- High beam headlights not turning on or functioning intermittently.
- Dashboard warning light indicating a high beam issue.
- Dim or flickering high beam headlights.
- Inability to switch between high and low beams.
How to Fix B3650 2017 GMC Sierra
- Begin by conducting a visual inspection of the high beam switch, wiring, and connections to check for any visible damage or loose connections.
- Test the high beam relay to ensure it is functioning correctly. Replace if necessary.
- Use a multimeter to test the voltage in the high beam request circuit and compare it to the expected values outlined in the vehicle's service manual.
- If the voltage readings are abnormal, trace the circuit back to the control module and check for any faults. Repair or replace the control module as needed.
- Clear the DTC with a diagnostic scan tool after completing the repairs and test the high beam headlights to confirm that the issue has been resolved.
Cost to Fix B3650 2017 GMC Sierra
The cost of repairing the B3650 code on a 2017 GMC Sierra can vary depending on the specific cause of the issue. On average, the parts required for this repair, such as a new high beam switch or relay, can range from $50 to $200. Labor costs at an auto repair shop typically range from $80 to $150 per hour. Therefore, the total repair cost could be anywhere from $150 to $500 or more, depending on the extent of the repairs needed. It is advisable to consult with a professional mechanic for a more accurate estimate based on your vehicle's specific requirements.
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Frequently Asked Questions about B3650 2017 GMC Sierra Code
What does the OBDII code B3650 mean on a 2017 GMC Sierra?
Code B3650 refers to an issue with the High Beam Request Signal Circuit, indicating that the signal performance is invalid or not functioning as expected.
What are the symptoms of code B3650 on a 2017 GMC Sierra?
Symptoms may include high beams not activating, high beams staying on unexpectedly, or a malfunction indicator light (MIL) on the dashboard.
What causes the code B3650 to appear on a 2017 GMC Sierra?
Common causes include a faulty high beam switch, damaged wiring or connectors in the high beam circuit, or a problem with the body control module (BCM).
How can I diagnose code B3650 on my 2017 GMC Sierra?
Start by inspecting the high beam switch and its connections for damage, check the wiring for shorts or corrosion, and use a scan tool to monitor the high beam request signal.
Can a bad body control module (BCM) cause code B3650?
Yes, a malfunctioning BCM can cause this code if it cannot properly interpret or process the high beam request signal.
How do I fix code B3650 on a 2017 GMC Sierra?
Repairs may involve replacing the high beam switch, repairing or replacing damaged wiring, or reprogramming or replacing the BCM if necessary.
Is code B3650 a serious issue for my 2017 GMC Sierra?
While it may not affect drivability, this code can impair the functionality of your high beams, which is a safety issue when driving at night or in poor visibility.
Can I drive my 2017 GMC Sierra with code B3650?
You can drive the vehicle, but avoid driving at night or in low-visibility conditions until the high beam issue is resolved.
How much does it cost to fix code B3650 on a 2017 GMC Sierra?
Repair costs vary depending on the root cause. Replacing a high beam switch may cost $100-$200, while BCM replacement or reprogramming can cost $300-$800.
Will clearing the code B3650 solve the problem?
Clearing the code may turn off the warning temporarily, but the underlying issue must be repaired to prevent the code from returning.
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