B3811 Chevrolet Code - Rear Washer Relay Circuit
Quick Answer
The Body Control Module (BCM) controls the rear washer based on an input from the rear wiper switch, which is part of the turn signal/multifunction switch. Common causes include Faulty Rear Window Washer Pump, Rear Window Washer Pump harness is open or shorted, Rear Window Washer Pump 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
- B3811 Chevrolet indicates Rear Washer Relay Circuit.
- Common causes
- Common causes include Faulty Rear Window Washer Pump, Rear Window Washer Pump harness is open or shorted, Rear Window Washer Pump 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.
Code B3811 Chevrolet Description
The rear window washer pump is controlled by the BCM controls through the rear washer pump relay. When the rear wash switch is pressed, ignition voltage from the BCM is applied to the rear washer relay control circuit. The rear washer relay control circuit is used to energize the relay coil and close the rear washer pump control circuit to B+.
What are the Possible Causes of the DTC B3811 Chevrolet?
- Faulty Rear Window Washer Pump
- Rear Window Washer Pump harness is open or shorted
- Rear Window Washer Pump circuit poor electrical connection
- Faulty Body Control Module (BCM)
How to Fix the DTC B3811 Chevrolet?
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 B3811 Chevrolet 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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Frequently Asked Questions about B3811 Chevrolet Code
1. What are the common symptoms of OBDII code B3811 in a Chevrolet related to the Rear Washer Relay Circuit?
The common symptoms of OBDII code B3811 in a Chevrolet include inoperative rear windshield washer, failure of the rear washer pump to activate, and a non-functioning rear wiper.
2. What are the possible causes of OBDII code B3811 in a Chevrolet?
Possible causes of OBDII code B3811 in a Chevrolet include a faulty rear washer relay, damaged wiring or connectors in the rear washer circuit, or a malfunctioning rear washer pump.
3. How can I diagnose the issue causing OBDII code B3811 in my Chevrolet?
To diagnose the issue causing OBDII code B3811 in your Chevrolet, you can perform a visual inspection of the rear washer system components, test the rear washer relay for continuity, and check the wiring and connectors for any signs of damage.
4. What are some repair tips for fixing OBDII code B3811 in a Chevrolet?
Some repair tips for fixing OBDII code B3811 in a Chevrolet include replacing the rear washer relay if faulty, repairing any damaged wiring or connectors, and ensuring proper connection of the rear washer pump.
5. Can I drive my Chevrolet with OBDII code B3811 present?
It is generally safe to drive your Chevrolet with OBDII code B3811 present, as this code usually indicates a non-critical issue related to the rear washer system. However, it is recommended to address the problem promptly to maintain the functionality of the rear washer.
6. How do I reset OBDII code B3811 in a Chevrolet after making repairs?
After making repairs to address OBDII code B3811 in a Chevrolet, you can reset the code using an OBDII scanner or by disconnecting the vehicle's battery for a few minutes. This will clear the code from the vehicle's memory.
7. Is OBDII code B3811 specific to certain Chevrolet models?
OBDII code B3811 related to the Rear Washer Relay Circuit is specific to certain Chevrolet models equipped with onboard diagnostics. It may vary in its interpretation and troubleshooting steps across different Chevrolet vehicles.
8. Can extreme weather conditions trigger OBDII code B3811 in a Chevrolet?
Extreme weather conditions like heavy rain, snow, or freezing temperatures can potentially affect the rear washer system in a Chevrolet, leading to issues that may trigger OBDII code B3811. Ensure proper maintenance to prevent weather-related problems.
9. Are there any recalls or technical service bulletins related to OBDII code B3811 in Chevrolet vehicles?
Recalls and technical service bulletins related to OBDII code B3811 in Chevrolet vehicles are issued by the manufacturer as needed. It is recommended to check with a Chevrolet dealership or online resources for any relevant information on recalls or service bulletins.
10. How can I prevent OBDII code B3811 from appearing in my Chevrolet in the future?
To prevent OBDII code B3811 from appearing in your Chevrolet in the future, regularly maintain the rear washer system, keep the washer fluid reservoir filled, and address any issues promptly to avoid potential circuit failures.
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