Address the issue of the B1336 code by checking the current draw of the Memory Seat Module (MSM). When the current exceeds 81 amps, immediate action is required to prevent potential damage to the electrical system. Start by inspecting the wiring and connectors for signs of wear or damage. A poor connection can lead to increased resistance, causing the module to draw excessive current.
Next, verify the power supply to the MSM. Ensure that it receives the correct voltage as specified in the vehicle’s service manual. A voltage drop can cause the module to overcompensate, leading to high current draw. Use a multimeter to measure the voltage at the module while the system is active.
If the wiring and voltage supply are in good condition, examine the MSM itself for faults. A malfunctioning module may require replacement. Review any applicable service bulletins for additional guidance on troubleshooting this specific issue. Keeping your vehicle’s electrical components in optimal condition prolongs their lifespan and ensures reliable performance.
B1336 – Memory Seat Module (MSM) Current Exceeds 81 Amps
The B1336 code indicates that the Memory Seat Module (MSM) is drawing excessive current, surpassing 81 amps. This condition can lead to component damage or system failure. To address this issue, begin by checking the wiring and connectors associated with the MSM for signs of wear or damage. Look for frayed wires or loose connections that could cause increased resistance and higher current draw.
If the wiring appears intact, inspect the MSM itself. Test the module for proper functionality using a diagnostic tool. A malfunctioning module may fail to regulate current correctly, leading to excessive draw. If necessary, replace the MSM to resolve the issue.
In addition, review the seat’s motor and mechanisms. A stuck or malfunctioning motor may draw more current than normal. Ensure that all mechanical components are working smoothly. Lubricate moving parts as needed and replace any damaged components to minimize strain on the MSM.
Finally, after repairs, clear the fault codes and conduct a test cycle. Monitor the current draw during operation. If the code reappears, further investigation may be required into the vehicle’s electrical system to pinpoint the underlying cause.
Understanding the B1336 Code Definition
The B1336 code indicates that the memory seat module (MSM) is drawing a current that exceeds 81 amps. This excessive current may signal a malfunction within the MSM or its associated wiring. Immediate attention to this issue is necessary to prevent potential damage to the module or related components.
First, check the wiring connections to ensure there are no shorts or loose connectors. Inspect the circuit for any signs of wear or damage, as these can lead to increased resistance and higher current draw. If the wiring appears intact, proceed to test the MSM itself. Utilizing a multimeter, measure the current flowing through the module during operation to confirm if it surpasses the threshold.
If the issue persists, consider the possibility of a fault within the MCU (microcontroller unit) that controls the MSM. A software glitch could also cause irregular behavior, necessitating a firmware update or reset. In cases where replacements are needed, sourcing OEM parts ensures compatibility and reliability.
Lastly, consult the vehicle’s service manual for manufacturer-specific diagnostic procedures related to the B1336 code. This will provide a structured approach to addressing the issue and restoring proper functionality to the memory seat system.
Common Symptoms of B1336 Code in Vehicles
A vehicle showing a B1336 code often indicates issues with the memory seat module (MSM). You might first notice irregular operation of the power seats. The seats may not move smoothly or might hesitate when adjusting. You could also find that the seats only work intermittently, leaving some positions unresponsive.
Another common symptom is malfunctioning of the memory functions. The seats may not return to their programmed positions, or the memory feature may reset unexpectedly. If you’re experiencing this, it’s advised to check for a connection issue or a module fault.
Electrical Problems
Excessive electrical draw can lead to additional symptoms. You may observe blown fuses related to the seat adjustments, or other electrical systems might behave erratically due to power surges. If your dashboard lights flicker or if there are issues with other electronic components in the vehicle, this could suggest a broader electrical problem linked to the MSM’s high current draw.
Increased Heat from the Module
Another sign of trouble is unusual heat emanating from the seat module. If you feel warmth near the seat controls or module area, it’s a clear indicator that the current exceeds normal levels, warranting immediate diagnostic checks. Ignoring this symptom may lead to component failure or even fire hazards.
To resolve these symptoms, consider inspecting wiring harnesses for damage or corrosion, and testing the MSM for faults. Ensuring proper electrical connections and checking for shorts in the system can significantly mitigate these issues.
Potential Causes of Excess Current in MSM
The Memory Seat Module (MSM) may exceed 81 amps due to several specific factors. Identifying these causes is key to addressing performance issues effectively.
1. Short Circuits
- Inspect wiring harnesses for damage or wear.
- Examine connectors for corrosion or loose connections.
- Check for exposed wires that could create unintended paths to ground.
2. Overloaded Components
- Verify that the load demands of the seats do not exceed the MSM specifications.
- Consider the number of features being used simultaneously, such as heating and power adjustments.
- Replace any components that show signs of overheating or malfunction.
Maintaining proper voltage levels is critical. Monitor power supply quality to ensure it remains stable. A fluctuating voltage can push the MSM beyond its current limits.
3. Software Issues
- Update the MSM firmware to eliminate bugs that could lead to excessive current draw.
- Perform a reset on the MSM to clear any stuck processes.
Environmental factors also play a role. Extreme temperatures can affect the module’s performance and increase current usage. Regularly check the MSM for temperature-related issues, especially in areas with frequent temperature fluctuations.
By addressing these potential causes, you can prevent excess current from stressing the MSM, ensuring reliable operation and longevity of the module. Regular maintenance checks and component inspections are essential.
How to Diagnose B1336 Code Issues
Begin with a visual inspection of the memory seat module (MSM) wiring and connectors. Look for frayed wires, corrosion, or loose connections that may contribute to excessive current draw.
Use a multimeter to measure the resistance across the seat adjustment motors. High resistance indicates a potential failure in the motor, which could lead to increased amp draw. Replace any motors that test outside of the manufacturer’s specifications.
Check the power supply to the MSM. Verify that the voltage is within the normal range (usually around 12V). Any significant deviation could signal a problem with the wiring or the vehicle’s electrical system.
Examine the MSM for any signs of damage or burnt components. If the module itself has failed, it may need replacement. Consider using a diagnostic scanner to pull additional fault codes that may indicate related issues.
If the preliminary checks are clear, focus on the seat position sensors. Malfunctioning sensors can lead to improper feedback to the MSM and cause excessive current usage. Test each sensor individually to ensure they function correctly.
For advanced diagnostics, perform a current draw test while operating the seat adjustments. Use a clamp meter for accurate measurements. If the current exceeds 81 amps during operation, further investigation into the seat assembly and component integrity is necessary.
After addressing any identified issues, clear the B1336 code with a diagnostic tool and take the vehicle for a test drive. Monitor the system closely to ensure the problem does not recur.
Testing the Memory Seat Module Functionality
Begin testing the Memory Seat Module (MSM) by checking the vehicle’s diagnostic trouble codes (DTCs) using an OBD-II scanner. Look specifically for the B1336 code, which indicates current draw exceeding 81 amps.
Follow these steps for a thorough assessment:
- Visual Inspection:
- Check for damaged wiring or connectors leading to the MSM.
- Inspect the memory seat switch for signs of wear or malfunction.
- Perform a Current Draw Test:
- Disconnect the seat motor connector.
- Use a multimeter to measure the current draw when operating different functions such as seat movement and memory recall.
- Functionality Check:
- Test each seat adjustment feature (forward, backward, height, tilt).
- Check memory functions by saving and recalling settings; observe for consistent operation.
- Module Recalibration:
- Follow the manufacturer’s procedure to recalibrate the MSM if issues persist.
- Clear any codes after performing tests and reconfirm no trouble codes reappear.
If problems continue after testing, consider replacing the MSM. Verify compatibility with the vehicle model and ensure proper installation. Recheck the current draw following installation to confirm resolution of the initial issue.
Document all tests and outcomes to guide future troubleshooting. Keeping records is crucial for ensuring ongoing vehicle maintenance.
Inspecting Wiring and Connectors Related to MSM
To address the issue of the Memory Seat Module (MSM) drawing excessive current, begin by inspecting the wiring and connectors involved. Check for any visible signs of damage such as fraying, corrosion, or exposed wires. These conditions often lead to increased resistance, resulting in higher current draw.
Wiring Inspection
Inspect each wire for continuity using a multimeter. Look for breaks in the insulation and ensure that all connectors are firmly seated. A loose connection can create intermittent power issues, contributing to the excessive current draw. Pay particular attention to the power and ground wires associated with the MSM.
Connector Evaluation
Remove and examine the connectors for any signs of burning or overheating. Clean any corrosion with contact cleaner, ensuring a good electrical connection. If a connector appears damaged, replace it, as a poor connection can elevate current levels. Verify that the pins within the connectors are properly aligned and free from debris.
| Action | Description |
|---|---|
| Visual Inspection | Look for fraying, corrosion, and exposed wires. |
| Continuity Test | Check wires with a multimeter for any breaks. |
| Connector Cleaning | Use contact cleaner to remove corrosion from connectors. |
| Replacement | Replace any damaged connectors to ensure solid connections. |
A thorough inspection of wiring and connectors can significantly reduce the current draw of the MSM. Proceed with making any necessary repairs or replacements to restore optimal functionality.
Common Failures in Memory Seat System Components
The memory seat system often experiences issues, primarily due to component failures. Proactively addressing these concerns can enhance performance and prevent costly repairs.
- Memory Seat Module (MSM) Malfunction
High current draw exceeding 81 amps often indicates a problem with the MSM. Inspect the module for overheating and replace if necessary. Check wiring for shorts or corrosion, as these can contribute to excessive currents.
- Motor Failures
Seat adjustment motors can wear out from regular use, leading to grinding noises or complete failure. Inspect the motors for physical damage or misalignment and replace where needed.
- Wiring Issues
Frayed or damaged wiring can disrupt power to the memory seat system. Regularly inspect wires for signs of wear. Repair any damaged sections or replace affected wiring harnesses.
- Switch Malfunctions
Faulty seat control switches can affect functionality, preventing seat adjustments. Test switches for continuity and replace any that show defects.
- Sensor Failures
Memory sensors that track positions can fail, leading to inaccurate seat adjustments. Calibrate sensors or replace them if they do not respond accurately to commands.
- ECU Problems
Electronic control units (ECUs) can become sluggish or unresponsive. Resetting the ECU may resolve some issues. In cases of failure, consider reprogramming or replacement.
Regular diagnostics and maintenance of the memory seat system components can lead to extended service life and improved performance. Keeping an eye on these common failures allows for timely interventions and a better driving experience.
Using a Multimeter for Accurate Current Measurement
Begin by selecting a reliable multimeter with a current measurement function. Ensure it can handle the expected current range. For high current scenarios, like diagnosing the memory seat module (MSM), choose a model that supports measurements above 81 amps.
Follow these steps for accurate current measurement:
- Turn off power to the circuit you’ll be testing to avoid injury or damage.
- Set the multimeter to the appropriate current mode–AC or DC–based on the circuit type.
- Connect the multimeter in series with the circuit. This requires breaking the circuit at the point where you want to measure current.
- Reconnect power and observe the multimeter reading. Ensure the connections are secure to prevent erroneous readings.
- Once finished, turn off the power before removing the multimeter from the circuit.
For a clearer understanding of the multimeter’s functionality, refer to the following table detailing common settings:
| Setting | Description | Use Case |
|---|---|---|
| DC Amps | Measures direct current | Automotive circuits, battery testing |
| AC Amps | Measures alternating current | Household appliances, power supply systems |
| µA | Measures small current | Leakage current, low-power devices |
| mA | Measures medium current | Sensors, small motors |
Check the multimeter’s specifications for the maximum current it can handle to avoid damage. If the reading exceeds the limit, split the circuit and measure in smaller segments or use a clamp meter designed for higher currents.
Perform a series of measurements to confirm consistency. Fluctuating readings may indicate a fault in either the device or the connections. Regular calibration of the multimeter helps maintain accuracy over time.
Replacing Faulty Memory Seat Module Components
Consider inspecting the connectors and wiring leading to the Memory Seat Module (MSM) first. Loose connections or damaged wiring can trigger high current readings. Ensure all connections are secure and wires show no signs of fraying or corrosion.
1. Check the Fuse
Begin with the fuse associated with the memory seat system. A blown fuse may indicate an underlying issue. Replace it, and if it blows again, further investigation is necessary.
2. Test the Memory Seat Module
- Disconnect the MSM from the vehicle’s electrical system.
- Use a multimeter to check for shorts in the module.
- If the module shows signs of malfunction such as burnt components or is not responding to tests, prepare for replacement.
3. Replace the Memory Seat Module
Purchase a compatible replacement MSM for your vehicle model. Follow these steps for installation:
- Disconnect the vehicle battery to prevent electrical shocks.
- Remove any interior panels blocking access to the MSM.
- Unscrew and detach the faulty module.
- Install the new module, securing it with screws.
- Reconnect the wiring harness and ensure tight connections.
- Reattach any interior panels that were removed.
- Reconnect the vehicle battery.
4. Test the System
After installation, conduct a functionality test of the memory seat features. Adjust the seats to verify that the new module operates correctly and maintains memory settings.
Addressing issues promptly ensures the comfort of the vehicle occupants and prevents further electrical system complications.
What to Check in the Vehicle’s Electrical System
Begin with the battery. Inspect for corrosion around the terminals and ensure tight connections. A weak battery can lead to excessive current draw. Check the voltage; it should be between 12.4 and 12.6 volts when the engine is off.
Next, evaluate the alternator. Use a multimeter to verify the output voltage while the engine runs. It should read between 13.8 and 14.4 volts. If the output is low, consider testing the alternator’s diodes and wiring.
Inspect all fuses and relays related to the seat module. A blown fuse can indicate overcurrent issues. Replace any blown fuses and examine relay functionality; a malfunctioning relay might lead to improper operation, contributing to high current draw.
Examine wiring harnesses for damage or fraying. Look for any signs of wear or shorts that may cause excessive current flow. Pay close attention to connections; faulty connectors can lead to increased resistance.
Inspect the Memory Seat Module (MSM) itself. Listen for unusual sounds or irregular operation during adjustment. If the module feels warm to the touch, it may be drawing excess current, potentially signaling a problem. Check for software updates, as these can fix operational issues.
If any components show signs of overheating, replace them promptly to prevent further damage. Use a thermal camera or infrared thermometer to identify hotspots in the electrical system.
Lastly, consider any aftermarket modifications. Additional electronic components can introduce compatibility issues, leading to higher amperage draws. Review these modifications and their impact on the overall electrical system.
Understanding the Role of Power Supply in MSM
The power supply is a critical component for the Memory Seat Module (MSM). To maintain functionality, it must deliver consistent voltage and current within specified limits. If the MSM current exceeds 81 amps, it indicates an underlying issue in the power supply or the module itself.
Maintaining Optimal Voltage Levels
Ensure that the voltage supplied to the MSM remains stable. Fluctuations can lead to erratic behavior or damage. Using a multimeter, regularly check the voltage during operation. A steady output between 12 to 14 volts is ideal. If values fall outside this range, inspect the wiring and connectors for corrosion or damage.
Monitoring Current Draw
Regularly monitor the current draw of the MSM closely. If you notice values above 81 amps, this usually points to a fault in the seat motors or control module. Investigate by disconnecting the seat motors individually to identify which component is causing the excess draw. This approach allows for targeted repairs and avoids unnecessary replacement of functioning parts.
Keep in mind that maintaining a healthy power supply not only prevents overload situations but also extends the lifespan of the Memory Seat Module. Regular diagnostics and proactive maintenance are key to ensuring optimal performance.
How to Reset B1336 Code After Repairs
Follow these steps to reset the B1336 code effectively after completing your repairs. Resetting the code ensures that the system recognizes the changes and operates correctly.
Steps to Reset the B1336 Code
1. Disconnect the Battery: Begin by disconnecting the negative terminal of the vehicle’s battery. Leave it disconnected for about 10-15 minutes. This action clears the temporary codes stored in the system.
2. Reconnect the Battery: After the wait, reconnect the negative terminal securely. Ensure that the connection is firm to avoid future issues.
3. Use an OBD-II Scanner: Connect an OBD-II scanner to the vehicle’s diagnostic port. Power on the scanner and navigate to the diagnostic section to check for any lingering codes.
4. Clear the Codes: Use the scanner to erase the B1336 code. Most scanners have a clear code option. Select this option and follow the prompts to complete the process.
5. Turn the Ignition On: Without starting the engine, turn the ignition key to the ‘On’ position. This action wakes up the vehicle’s computer and allows it to detect any changes made during repairs.
6. Check for Codes Again: After clearing, check the codes again using the scanner to confirm that the B1336 code has been successfully reset. Ensure there are no new codes present.
7. Test Drive: Take the vehicle for a test drive to allow the system to recalibrate. Monitor any warning lights and ensure the memory seat functions operate as intended.
Additional Tips
Always ensure your vehicle is in a safe location while performing these steps. Consult your vehicle’s manual for specific procedures related to your model if needed. Keeping your OBD-II scanner updated can also assist in efficient troubleshooting in the future.
| Step | Action |
|---|---|
| 1 | Disconnect the battery |
| 2 | Reconnect the battery |
| 3 | Use an OBD-II scanner |
| 4 | Clear the codes |
| 5 | Turn the ignition on |
| 6 | Check for codes again |
| 7 | Test drive |
Preventive Maintenance Tips for Memory Seat Systems
Regularly inspect the memory seat system for wear and tear. Look for frayed wires, loose connections, or any visible damage to the seat adjustment components. Addressing these issues early can prevent larger failures.
Clean the seat and its mechanisms frequently. Use a mild cleaner for the upholstery and a damp cloth for the electrical components to remove dust and debris. Ensure that no moisture enters the electronic parts to avoid malfunctions.
Test the memory functions periodically. Store and recall seat positions to confirm proper functionality. If there are discrepancies in movement or the system fails to remember positions, investigate further or consult a professional.
Check the fuses and wiring connections. A blown fuse or faulty connection can cause the system to malfunction. Replacing defective components promptly can ensure continuous operation and prevent overheating issues.
Keep the seat adjustment controls free from obstruction. Ensure that nothing interferes with the movement of the seat, as foreign objects can cause strain on the system.
Consult the vehicle’s manual for specific maintenance recommendations from the manufacturer. Following these guidelines ensures optimal performance and longevity of the memory seat system.
Consider professional inspections at regular intervals. Certified technicians can identify hidden issues and offer expertise in maintenance, ensuring the system operates safely and efficiently.
Comparing OEM vs. Aftermarket Memory Seat Modules
Choose OEM Memory Seat Modules for reliability and perfect compatibility with your vehicle. OEM parts are designed according to manufacturer specifications, ensuring seamless integration and optimal performance. While they might come with a higher price tag, the assurance of quality often offsets this cost.
Benefits of OEM Memory Seat Modules
- Precision Fit: OEM parts match the original components exactly, reducing installation issues.
- Warranty Protection: Typically backed by a manufacturer warranty, offering peace of mind against defects.
- Performance Assurance: Engineered to meet or exceed original performance standards, ensuring long-lasting functionality.
Challenges with Aftermarket Memory Seat Modules
- Compatibility Issues: Aftermarket modules may not fit as well, leading to potential malfunctions.
- Varied Quality: The quality can differ significantly between brands, making it crucial to research before purchasing.
- Lack of Warranty: Many aftermarket products lack comprehensive warranty coverage, increasing risk.
Weigh the pros and cons carefully. If you prioritize reliability, opt for OEM. For cost savings, robust research can lead to a suitable aftermarket option, but be prepared for possible challenges with fit and functionality.
Documenting Repairs and Code Resets for Future Reference
Maintain a thorough record of repairs and code resets related to B1336 issues. Documenting each step assists in streamlining future diagnostics and repairs. Create a dedicated log that includes dates, symptoms observed, actions taken, and results achieved. This practice enhances accountability and provides a reference for similar situations down the line.
Include the following key details in your documentation:
| Date | Description of Issue | Actions Taken | Outcome | Follow-up Steps |
|---|---|---|---|---|
| 2023-10-01 | Error B1336 – Memory seat module exceeds 81 amps | Checked wiring connections; inspected fuse. | Voltage normalized; Issue temporarily resolved. | Monitor for reoccurrence; consider replacement of Memory Seat Module. |
| 2023-10-05 | Reoccurring error B1336 | Performed code reset; inspected module integrity. | Error code cleared; module functioning properly. | Schedule follow-up if error reappears within a week. |
Assess repeat occurrences. Identify patterns influencing high amperage readings. Use documented information to target specific components that may require replacement or additional inspection. This approach not only helps in immediate troubleshooting but aids in long-term planning for component lifespan and maintenance schedules.
Finally, store documentation in an easily accessible database or digital format. This convenience allows quick reference for both current and future technicians. Establish a protocol for updating records whenever a new repair occurs or when an important change is made to the system.
When to Seek Professional Help for B1336 Code
If the B1336 code appears, it’s time to consult a professional. When the memory seat module (MSM) current exceeds 81 amps, a qualified technician should investigate the issue to prevent potential damage to the vehicle’s electrical system.
Look for signs such as intermittent seat malfunction, unusual noises during seat adjustments, or unexpected power draw. These symptoms can indicate underlying problems that require expert attention.
Additionally, if you’re not familiar with electrical systems or feel unsure about troubleshooting, don’t hesitate to seek help. Professionals possess the diagnostic tools and expertise necessary to accurately assess and resolve the issue without risking further complications.
Repairing wiring or replacing the MSM can be intricate. A specialist will ensure that the repair adheres to manufacturer specifications, preserving your vehicle’s safety and functionality.
Consider reaching out if the issue persists after basic troubleshooting, such as checking fuses or inspecting wiring for visible damage. Prompt action can mitigate more extensive repairs later on.
