Check your vehicle’s rear washer motor input circuit if you encounter a B3713 code. This signal high error can indicate a malfunction that may affect rear visibility during driving. Immediate action can prevent further complications, including damage to the Body Control Module (BCM).
The first step involves performing a visual inspection of the wiring and connectors associated with the rear washer motor. Look for any signs of wear, corrosion, or loose connections. Fixing these can often resolve the high input signal issue without further intervention.
If the wiring appears intact, use a multimeter to test the voltage at the washer motor. Compare the reading to the manufacturer’s specifications. A reading outside this range typically points to either a faulty motor or a malfunctioning BCM. Replacing the defective part promptly restores proper function.
Documentation specific to your vehicle model can provide additional insights during troubleshooting. Consult repair manuals or online forums where fellow vehicle owners share their experiences with the same code. Such resources can offer valuable guidance and detailed steps for addressing the issue effectively.
Understanding the B3713 Diagnostic Code
The B3713 code indicates a high voltage condition in the rear washer motor input circuit, as interpreted by the Body Control Module (BCM). To resolve this issue, focus on several critical areas that may be causing the problem.
First, inspect the wiring and connectors associated with the rear washer motor. Look for signs of damage, corrosion, or loose connections that can lead to an intermittent or excessive voltage reading. Repair or replace any faulty components to restore proper functionality.
Next, test the rear washer motor itself. A malfunctioning motor can cause the system to draw excess current, triggering the B3713 code. Use a multimeter to measure the resistance of the motor; if it falls outside the manufacturer’s specifications, replacement is necessary.
Also, examine the BCM for any software updates or faults. Occasionally, resetting the BCM can resolve false codes. Explore the manufacturers’ service guidelines for potential updates or reprogramming procedures.
Lastly, ensure that the vehicle’s battery and charging system are in good condition. An unstable power supply may cause voltage fluctuations, leading to diagnostic trouble codes. Check the battery voltage and connections, addressing any issues as needed.
By following these steps, you can effectively diagnose and fix issues related to the B3713 code, ensuring the reliability of your vehicle’s rear washer system.
Common Symptoms of the B3713 Code
The B3713 code indicates a problem with the rear washer motor input circuit, which can manifest through several symptoms. Recognizing these signs early helps in diagnosing and fixing the issue efficiently.
Drivers may notice that the rear windshield washer does not operate when activated. This failure can stem from issues in the motor, wiring, or the Body Control Module (BCM). Observing no washer fluid spraying when the button is pressed is a primary indicator.
Another symptom involves irregular voltage levels in the circuit. You might experience a dim warning light on the dashboard or an alert indicating a malfunction. Testing the electrical connections can reveal inconsistencies, prompting further investigation.
Physical signs such as frayed wires or corrosion around the connection points are also common. Inspect these areas as part of your troubleshooting process to identify any potentially damaging factors affecting the circuit.
| Symptom | Description |
|---|---|
| No rear washer operation | The rear windshield washer does not spray fluid when activated. |
| Warning light | The dashboard may display a warning light indicating an issue with the washer system. |
| Electrical inconsistencies | Voltage tests show irregular readings in the washer motor circuit. |
| Physical damage | Wires may show signs of wear, fraying, or corrosion at connection points. |
Regular maintenance and visual checks can help to catch these symptoms early. Addressing the B3713 code promptly ensures that the rear washer system functions correctly and improves overall vehicle safety.
Key Components in the Input Circuit
The input circuit for the rear washer motor consists of several critical components that ensure proper functionality. Begin by examining the washer motor itself. This device operates by converting electrical energy into mechanical energy, activating the washer system.
Next, check the wiring harness connecting the washer motor to the Body Control Module (BCM). Damaged or corroded wires can cause a high input signal error. Inspect the connectors for any signs of wear or poor connections, as this can dramatically affect the circuit’s performance.
Body Control Module (BCM)
The BCM processes the input signals from various components. Ensure that the BCM is functioning correctly. Performing a diagnostics check can reveal if the module is receiving correct voltage levels from the input circuit.
Input Voltage Sources
Investigate the voltage input supplying the BCM. A multimeter can help verify if the expected voltage is present. If the voltage is excessively high, this may trigger a fault code. Additionally, check the fuse linked to the washer system; a blown fuse can signify an underlying electrical issue.
Regular maintenance and thorough inspections of each component within the input circuit will contribute to reliable performance and prevent errors related to the rear washer motor input circuit.
How to Access the BCM for Diagnostics
First, locate the Body Control Module (BCM) in your vehicle. It’s typically found beneath the dashboard, near the driver’s side or passenger’s side. Refer to your vehicle’s service manual for the exact location, as it can vary by make and model.
Next, disconnect the vehicle’s battery to prevent any electrical shorts or harm while working with the BCM. Use a socket wrench to remove the negative terminal first, ensuring all systems are powered down.
Once the battery is disconnected, access the BCM by removing any panels or covers that obstruct its view. Gently detach the connectors from the BCM by pressing the release tabs. Be cautious to avoid damaging the connectors or the module itself.
With the BCM exposed, inspect it for any visible signs of damage or corrosion. If deterioration appears, consider replacing the module as a precaution. For diagnostics, connect a scan tool to the vehicle’s diagnostic port, usually located under the dashboard. Follow the instructions on the scan tool to retrieve any error codes relating to the BCM.
After completing your diagnostics, reconnect the BCM connectors securely. Replace any panels you removed and reattach the battery terminal, starting with the positive side. Finally, test the vehicle’s systems to confirm everything operates properly.
Multimeter Usage for Testing Voltage Levels
To test voltage levels effectively, set your multimeter to the DC voltage setting. This setting is ideal for automotive circuits, including the Rear Washer Motor Input Circuit. Connect the black probe to the negative terminal or ground, and the red probe to the positive terminal of the circuit you want to test.
Steps for Accurate Measurement
Follow these steps to ensure accuracy:
- Turn on the vehicle, since some circuits only power on when the ignition is engaged.
- Observe the multimeter reading. A standard voltage level should be close to the system’s operating voltage; for most vehicles, this is around 12-14 volts.
- If the reading is significantly higher or lower, it indicates a potential issue in the circuit.
Using Voltage Measurement for Diagnostics
If you detect a high voltage reading, it suggests that the BCM (Body Control Module) may be malfunctioning or there’s a short somewhere in the circuit. Conversely, low voltage could indicate a poor connection or a failing component. Testing voltage at various points in the circuit can help pinpoint the problem area.
| Reading | Meaning |
|---|---|
| 12-14 volts | Normal operation, voltage supplied correctly |
| Less than 12 volts | Possible connection issue or component failure |
| More than 14 volts | BCM malfunction or short circuit |
Keep your multimeter in good condition for reliable results. Regularly check for accurate calibration to ensure trusted readings whenever you test voltage levels in any circuit.
Identifying Wiring Issues in the Rear Washer
To identify wiring issues in the rear washer system, begin by inspecting the wiring harness connected to the rear washer motor. Look for signs of wear, damage, or corrosion that may interrupt the circuit. Use a multimeter to check for continuity between the rear washer motor connector and the Body Control Module (BCM). A lack of continuity can indicate a broken wire or a poor connection.
Checking Voltage Levels
Next, measure the voltage at the motor connector while the rear washer is activated. A reading below the specified voltage indicates a potential issue upstream in the circuit. Trace back to the BCM and confirm the output voltage during operation. If the BCM fails to send the correct signal, further investigation of its power supply and ground connections is necessary.
Inspecting Ground Connections
Ground connections often cause issues in electrical systems. Inspect the ground point for the rear washer motor, ensuring it is secure and free of corrosion. If the ground connection is faulty, the motor may not operate despite receiving power. Testing the ground with a multimeter allows for quick verification of its integrity.
Checking the Rear Washer Motor for Faults
Inspect the rear washer motor by first ensuring the vehicle’s power is off to prevent any accidental operation. Disconnect the electrical connector from the motor, and use a multimeter to measure the voltage at the connector while activating the washer switch. A reading around 12 volts indicates power is reaching the motor; if not, check the wiring and fuses linked to the washer system.
Next, remove the rear washer motor from its mounting. Check for any visible damage, such as cracks or corrosion. Apply direct battery voltage to the motor terminals to see if it activates. If the motor runs smoothly, the issue likely lies within the control circuit or switch. If it doesn’t function, consider replacing the motor.
Inspect the fluid supply line for blockages or leaks. Clear any clogs to ensure fluid reaches the nozzle. A faulty nozzle can also cause performance issues; test it by running water through it to check for proper flow. If necessary, clean or replace the nozzle based on its condition.
Finally, reassess all connections and wiring for signs of wear or corrosion. Secure any loose connections to enhance reliability. After completing these checks, reassemble the system and perform a final test to confirm the rear washer motor is functioning correctly.
Role of Ground Connections in the Circuit
Ensure all ground connections are secure and free from corrosion. A solid ground connection is fundamental for circuit functionality, as it completes the electrical path. Poor ground can lead to intermittent issues, causing the BCM to misinterpret signals from the rear washer motor.
Check the resistance at ground points. Ideal resistance levels should be minimal; higher resistance indicates a weak connection that can disrupt communication within the circuit. Regularly inspect ground wires for any signs of wear or damage, as even minor fraying can significantly affect performance.
Consider using a multimeter to test ground connections. Measure voltage drop across the ground points while operating the washer motor. Any significant voltage drop suggests inadequate grounding, which could manifest as the input circuit high code. Addressing these areas can prevent potential malfunctions and ensure reliable operation.
Always use proper connectors and solder joints when making ground connections. This practice minimizes the risk of future deterioration. Keep ground points clean by using a wire brush or contact cleaner, especially in environments prone to moisture and dirt, which can accelerate corrosion.
Review the vehicle’s service manual for specific grounding strategies. Manufacturers often provide detailed diagrams and specifications that guide the installation and maintenance of ground connections related to the BCM and associated components.
In sum, prioritize regular maintenance of ground connections within the rear washer motor circuit. This proactive approach helps maintain system integrity, reduces electrical noise, and enhances overall performance of the components involved.
Common Causes of High Input Errors
High input errors in the rear washer motor’s circuit often stem from several specific issues. Addressing these can prevent further complications and maintain proper vehicle functionality.
Electrical Issues
- Short Circuits: A short circuit can lead to excessive voltage readings. Inspect wiring for signs of damage or exposure.
- Faulty Inputs: Damaged or corroded connectors may disrupt signals to the Body Control Module (BCM), resulting in high input errors.
- Grounding Problems: Poor grounding increases resistance and generates high input signals. Check grounding points for corrosion and secure connections.
Component Failures
- Washer Motor Malfunction: A malfunctioning motor may draw excess current, leading to abnormal input signals. Testing the motor’s resistance can help identify issues.
- BCM Faults: The BCM itself can malfunction. Run diagnostic tests to ensure it processes signals accurately.
- Wiring Insulation Damage: Frayed or damaged insulation on wires can cause unwanted input fluctuations. Carefully inspect all associated wiring for integrity.
Diagnosing high input errors requires vigilance in checking both electrical connections and components. Regular maintenance and attention to these areas help in avoiding potential problems with the rear washer motor system.
Steps to Reset the BCM After Repairs
Follow these steps to reset the BCM effectively after any repairs related to the rear washer motor input circuit.
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Disconnect the vehicle battery. Use a wrench to remove the negative terminal first, then the positive terminal. This ensures safety while working on the BCM.
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Wait for at least 15 minutes. This duration allows any remaining electrical charges to dissipate, which is crucial for a proper reset.
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Reconnect the battery terminals, starting with the positive terminal. Ensure a tight connection to prevent any electrical issues.
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Turn the ignition key to the “On” position, but do not start the engine. This step activates the vehicle’s electrical systems without starting the engine.
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Allow the BCM to enter its startup sequence, which typically takes a minute or two. This step helps the module recognize all connected components.
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Perform a system scan using an OBD-II scanner. This tool checks for any error codes, ensuring the BCM functions correctly and any previous issues are cleared.
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Test the rear washer motor and related circuits to confirm that everything operates as expected. If any issues persist, revisit the connections and wiring.
By following these steps, the BCM will reset properly, ensuring that any prior faults related to the rear washer motor input circuit are resolved.
How to Reprogram the BCM if Needed
Reprogram the Body Control Module (BCM) to resolve issues like “B3713 – Rear Washer Motor Input Circuit High”. Begin by ensuring you have the proper scan tool that supports BCM programming.
Connect the scan tool to the vehicle’s OBD-II port. Turn the ignition on without starting the engine. Select the BCM option from the scan tool menu, then navigate to the reprogramming section.
Follow the on-screen prompts to initiate the reprogramming process. Have a stable power source connected to the vehicle to avoid interruptions. Input any necessary vehicle-specific information, such as VIN, when prompted.
Once the reprogramming process starts, do not disconnect the scan tool or turn off the ignition. Wait until the tool confirms that reprogramming is complete. After that, exit the programming mode and turn off the ignition.
Clear any existing fault codes using the scan tool. Start the engine and test the rear washer functionality to confirm that the issue has been resolved.
If the problem persists, double-check the connections and wiring to the BCM, as well as the rear washer motor. If necessary, consult a service manual for further troubleshooting steps.
Using OBD-II Scanners for Code Retrieval
Connect your OBD-II scanner to the vehicle’s diagnostic port. This port is typically located under the dashboard near the driver’s seat. Power on the scanner and follow the prompts on the screen to establish communication with the vehicle’s onboard computer system.
Once connected, select the option to read diagnostic trouble codes (DTCs). The scanner will retrieve any stored codes and display them on the screen. A code like B3713, which indicates a rear washer motor input circuit high issue with the Body Control Module (BCM), will appear with additional details.
For accurate diagnosis, refer to the DTC descriptions provided by the scanner. Identify any related codes that may be present as they can provide insights into any interconnected issues. Document all retrieved codes, as this information will guide your troubleshooting.
Next, use the scanner to clear the trouble codes. This process helps reset the vehicle’s computer, allowing you to monitor if the issue reoccurs. After clearing the codes, perform a test drive. Pay attention to the rear washer functionality to verify the effectiveness of your repairs or maintenance.
Regularly using an OBD-II scanner promotes proactive maintenance. This practice can save time and money by identifying problems before they escalate. Consider investing in a reliable scanner compatible with your vehicle for ongoing use.
- Ensure your OBD-II scanner is updated for the most accurate readings.
- Familiarize yourself with the user manual of your specific scanner model for troubleshooting tips.
- If you encounter persistent codes, consult professional forums or repair guides for additional insights.
Maintenance Tips to Prevent Circuit Issues
Regularly inspect the wiring for any signs of wear or damage. Look for frayed edges, corrosion, or loose connections that could disrupt functionality. Addressing these issues promptly reduces the risk of circuit failure.
Check Connectors and Grounding
Ensure all connectors are secure and free from dirt or moisture. Corrosion can form over time, impacting connectivity. Additionally, verify that the grounding points are clean and tight to maintain a stable electrical flow.
Testing and Diagnosis
Utilize a multimeter to test the voltage in the rear washer motor circuit. Conduct tests while operating the washer to monitor voltage consistency. Replace any components that fail to meet manufacturer specifications.
| Maintenance Task | Frequency | Notes |
|---|---|---|
| Wire inspection | Every 6 months | Look for signs of wear or corrosion. |
| Connector cleaning | Annually | Use contact cleaner for corrosion. |
| Voltage testing | Every year | Check while operating the washer. |
By implementing these strategies, you can significantly reduce the risk of circuit issues in your rear washer motor, ensuring reliable performance. Regular maintenance not only keeps components working efficiently but also extends their lifespan.
When to Consult Professionals for B3713
Consult professionals immediately if your vehicle displays the B3713 error code. This usually signifies a problem with the rear washer motor input circuit, which can indicate a faulty motor, wiring issues, or a malfunctioning Body Control Module (BCM).
If you notice symptoms such as non-functioning rear washer fluid, unexpected electrical issues, or erratic behavior from other electrical components, seek professional assistance. Electrical problems can lead to further complications if not addressed swiftly.
Signs of Serious Issues
Pay attention to warning lights on your dashboard or any signs of electrical shorts. If your rear wiper operates irregularly or stops working, these are clear indicators that an expert should investigate. Early assessment can prevent costly repairs later on.
Importance of Accurate Diagnosis
DIY troubleshooting can be appealing, but it often leads to misdiagnosis or overlooked issues. Professionals have the necessary tools and expertise to accurately identify the malfunction. A thorough examination ensures that all related problems are addressed, promoting long-term functionality.
After Repair: Testing the System’s Functionality
Begin testing the rear washer motor system by reconnecting the battery. Ensure all connections to the washer motor and Body Control Module (BCM) are secure. Activate the rear washer from the vehicle’s interface, observing any response from the motor.
If the motor does not activate, proceed to measure voltage at the washer motor connector using a multimeter. Check for approximately 12 volts while the system is engaged. A lack of voltage indicates an issue with the BCM or the wiring harness. Repair any faulty wiring as needed.
System Activation Checklist
Perform the following steps to ensure proper functionality:
- Activate the rear washer function from the vehicle’s controls.
- Observe the washer fluid spraying pattern.
- Check for any leaks around the connections.
- Inspect the motor’s sound; it should operate smoothly without unusual noises.
Diagnostic Steps if Issues Persist
If problems continue, consult the diagnostic trouble codes (DTCs) using a scan tool. Look for codes related to the rear washer system or BCM. Based on the DTCs, perform targeted inspections on the following:
| Potential Issue | Action Required |
|---|---|
| Faulty BCM | Replace the BCM. |
| Short circuit in wiring | Inspect wiring for damage; repair or replace as necessary. |
| Defective washer motor | Test the motor separately; replace if faulty. |
| Connector issues | Clean or replace connectors. |
After completing repairs, repeat functionality tests to confirm the system operates as expected. Ensure to verify that the wash fluid is adequately spraying and that the system responds correctly to all commands. Document any changes made for future reference.
Understanding Manufacturer-Specific Guidelines
Review the manufacturer’s service manual for detailed specifications and procedures regarding the B3713 code. Familiarize yourself with the electrical schematics and component locations relevant to the rear washer motor input circuit.
- Check Wiring Connections: Inspect all connectors related to the rear washer motor for corrosion or damage. Ensure tight and secure connections to prevent signal loss.
- Test Voltage: Use a multimeter to verify the voltage at the washer motor input circuit. It should match the manufacturer’s specified range, typically around 12 volts.
- Examine Ground Points: Confirm that ground connections are clean and secure. Poor grounding can lead to high input circuit errors.
- Inspect the BCM: The Body Control Module (BCM) plays a key role in this circuit. If you’ve ruled out wiring issues, consider if the BCM requires reprogramming or replacement.
- Run Diagnostic Tests: Use an OBD-II scanner to perform a complete diagnostic check. Look for any additional fault codes that may provide further insight into the problem.
Follow these steps systematically to resolve the B3713 code. Adhering to manufacturer recommendations ensures accurate troubleshooting and reduces the likelihood of recurring issues.
Maintain updated service documentation and refer to any technical service bulletins issued by the manufacturer, as they may provide specific examples or updates related to the B3713 code.
Impact of Climate on Washer Systems
Extreme weather conditions significantly affect the performance of washer systems in vehicles. Cold temperatures can lead to frozen washer fluid, rendering the system inoperable. To mitigate this issue, use a winter-grade washer fluid, which remains effective at lower temperatures. Regularly check fluid levels and replace them seasonally to ensure optimal operation.
Humidity and Rainfall
High humidity and frequent rainfall can cause increased demand on washer systems. Regular use may lead to wear on components like wiper blades and motors. It’s wise to inspect the wiper blades for signs of deterioration and replace them if they show any wear. Additionally, ensure that the washer nozzles are clean to allow for proper fluid dispersion.
Dust and Sand
Dry conditions with dust or sand can also hinder washer system performance. Debris can clog washer nozzles, preventing fluid from reaching the windshield. Perform periodic cleaning of the nozzles to clear any blockages. Consider using a finer filter for the washer fluid reservoir to minimize dirt intake, especially in dusty regions.
- Use climate-appropriate washer fluid.
- Inspect wiper blades regularly.
- Clean washer nozzles to prevent clogs.
- Monitor fluid levels and replace as needed.
By taking these simple steps, you can enhance the reliability of your washer system regardless of the climate you encounter.
