B1D7C Code - Seat Horizontal Motor Control Performance Or Incorrect Operation
Quick Answer
The Memory System is made up of the Memory Seat Module-Driver (MSMD), Memory Switch, Driver Seat Switch and multiple Seat Motors. 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
- B1D7C indicates Seat Horizontal Motor Control Performance Or Incorrect Operation.
- 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 B1D7C 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 Memory Switch is a Mux switch that is used to set and recall the seat 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 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 positions for that particular selection and return the seat 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 B1D7C?
- 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 B1D7C?
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 B1D7C 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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Information for Specific Makes
- B1D7C Chrysler — Seat Horizontal Motor Control Performance Or Incorrect Operation
- B1D7C Dodge — Seat Horizontal Motor Control Performance Or Incorrect Operation
- B1D7C Jeep — Seat Horizontal Motor Control Performance Or Incorrect Operation
- B1D7C RAM — Seat Horizontal Motor Control Performance Or Incorrect Operation
Frequently Asked Questions about B1D7C Code
1. What does the OBDII code B1D7C mean?
The code B1D7C indicates a performance issue or incorrect operation of the seat horizontal motor control, which adjusts the horizontal position of the seat.
2. What are the common symptoms of the B1D7C code?
Symptoms may include the seat not moving horizontally, slow or jerky movement, or unusual noises when attempting to adjust the seat.
3. What causes the B1D7C code to appear?
Common causes include a faulty seat horizontal motor, wiring issues, a malfunctioning seat control module, or obstructions in the seat track.
4. Can I still drive my car if the B1D7C code is active?
Yes, the vehicle is still drivable, but the horizontal adjustment of the seat may not work, which could affect driver comfort or proper seating position.
5. How can I diagnose the B1D7C code?
Diagnosis involves checking for power and ground at the seat motor, inspecting wiring and connectors for damage, and testing the operation of the seat control module and motor.
6. How do I fix the B1D7C code?
Repairs may include replacing the seat horizontal motor, repairing damaged wiring or connectors, clearing obstructions in the seat track, or reprogramming or replacing the seat control module.
7. How much does it cost to fix the B1D7C code?
Costs vary depending on the exact issue but typically range from $150 to $500, including parts and labor.
8. Can a blown fuse trigger the B1D7C code?
Yes, if the fuse supplying power to the seat motor or control module is blown, it can cause the code to appear.
9. Will clearing the code fix the problem?
Clearing the code without addressing the underlying issue will not fix the problem, and the code is likely to return.
10. Can a software update resolve the B1D7C code?
In some cases, a software update for the seat control module may fix the issue if it’s caused by a software-related malfunction.
Discuss the causes and fixes for B1D7C OBDII Code
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