B1D7B Dodge Code - Seat Horizontal Motor Control Circuit Performance
Quick Answer
The Memory System is made up of a Memory Seat Module-Driver (MSMD), Memory Switch, Driver Seat Switch, Adjustable Pedal Switch, and multiple Seat Motors and an Adjustable Pedal Motor. Common causes include Faulty Driver Horizontal Seat Adjuster Motor, Driver Horizontal Seat Adjuster Motor harness is open or shorted, Driver Horizontal Seat Adjuster Motor 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
- B1D7B Dodge indicates Seat Horizontal Motor Control Circuit Performance.
- Common causes
- Common causes include Faulty Driver Horizontal Seat Adjuster Motor, Driver Horizontal Seat Adjuster Motor harness is open or shorted, Driver Horizontal Seat Adjuster Motor 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 B1D7B Dodge Description
The Driver Seat Switch is a Multiplex (Mux) switch which uses set resistance levels for each switch position. These resistances correspond to different voltages which is monitored by the MSMD over two separate circuits. When a voltage change is detected, the MSMD will command the appropriate Seat motor(s) to move the seat in the requested direction as long as the Driver Seat Switch is held in that direction or its stops have been reached.
The Adjustable Pedal Switch is a three position switch (forward, center, rearward). The MSMD monitors the forward and rearward circuits voltage. If a voltage change is detected, the MSMD will command the Adjustable Pedal motor to move the pedals in the requested direction as long as the Adjustable Pedal Switch is held in that direction or its stops have been reached.
The Memory Switch is a Mux switch that is used to set and recall the seat and pedal positions. When a Memory Switch button is pressed, the Driver Door Module (DDM) detects a voltage change and sends a request over the Controller Area Network (CAN) bus circuit to the MSMD to perform the requested command. If the SET button on the Memory Switch is pressed, followed by the 1 or 2 button, the MSMD will store the seat and pedal positions based on the position inputs received from the hall-effect position sensors. If the 1 or 2 button on the Memory Switch is pressed, the MSMD will recall the stored seat and pedal positions for that particular selection and return the seat and pedals to the stored positions. Memory position may also be recalled using a linked FOBIK transmitter. For driver safety, the MSMD will prevent the memory recall function from being initiated if the transmission gear selector lever is not in the Park position or if the vehicle is moving.
What are the Possible Causes of the DTC B1D7B Dodge?
- Faulty Driver Horizontal Seat Adjuster Motor
- Driver Horizontal Seat Adjuster Motor harness is open or shorted
- Driver Horizontal Seat Adjuster Motor circuit poor electrical connection
- Faulty Memory Seat Module-Driver (MSMD)
How to Fix the DTC B1D7B Dodge?
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 B1D7B Dodge 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 B1D7B Dodge Code
1. What does the OBDII code B1D7B mean on a Dodge vehicle?
The code B1D7B indicates an issue with the seat horizontal motor control circuit, specifically a performance problem or electrical fault in the circuit controlling the horizontal adjustment of the seat.
2. What are the common symptoms of the B1D7B code?
Symptoms may include the inability to adjust the seat horizontally, unusual noises from the seat motor, or the seat motor not responding at all.
3. What are the possible causes of the B1D7B code?
Common causes include a faulty seat horizontal motor, damaged wiring or connectors in the motor circuit, a blown fuse, or a malfunctioning seat control module.
4. Can the B1D7B code cause safety concerns?
Yes, if the seat cannot be adjusted properly, it may affect driving posture or the driver’s ability to reach the pedals and controls, potentially impacting safety.
5. How do you diagnose the B1D7B code?
Diagnosis typically involves using a scan tool to confirm the code, inspecting the wiring and connectors for damage, testing the seat motor for proper function, and checking for power supply issues.
6. Is it safe to drive with the B1D7B code?
While it may be safe to drive, you should address the issue promptly, as improper seat positioning can lead to discomfort or reduced control over the vehicle.
7. How do you fix the B1D7B code?
Repairs may include replacing the seat horizontal motor, repairing or replacing damaged wiring or connectors, resetting the seat control module, or replacing a blown fuse.
8. What tools are needed to fix the B1D7B code?
You may need a multimeter to test electrical circuits, a scan tool to clear the code, and basic hand tools to access and replace components.
9. How much does it cost to repair the B1D7B code?
Repair costs vary depending on the cause but may range from $100 for simple wiring repairs to $400 or more if the seat motor or control module needs replacement.
10. Can I fix the B1D7B code myself?
If you have experience with automotive electrical systems and the necessary tools, you may be able to fix minor issues like damaged wiring, but complex repairs may require a professional technician.
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