B1D87 RAM Code - Seat Backrest Motor Control Circuit Peformance
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 Recliner Seat Adjuster Motor, Driver Recliner Seat Adjuster Motor harness is open or shorted, Driver Recliner 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
- B1D87 RAM indicates Seat Backrest Motor Control Circuit Peformance.
- Common causes
- Common causes include Faulty Driver Recliner Seat Adjuster Motor, Driver Recliner Seat Adjuster Motor harness is open or shorted, Driver Recliner 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 B1D87 RAM 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 B1D87 RAM?
- Faulty Driver Recliner Seat Adjuster Motor
- Driver Recliner Seat Adjuster Motor harness is open or shorted
- Driver Recliner Seat Adjuster Motor circuit poor electrical connection
- Faulty Memory Seat Module-Driver (MSMD)
How to Fix the DTC B1D87 RAM?
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 B1D87 RAM 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 B1D87 RAM Code
1. What are the common symptoms of OBDII code B1D87 RAM related to the Seat Backrest Motor Control Circuit Performance?
- Common symptoms may include the seat backrest motor not adjusting properly, unusual noises from the motor, or the seat backrest not moving at all.
2. What are the possible causes of OBDII code B1D87 RAM related to the Seat Backrest Motor Control Circuit Performance?
- Possible causes can include a faulty seat backrest motor, damaged wiring or connectors in the circuit, or a malfunctioning control module.
3. How can I diagnose the issue causing OBDII code B1D87 RAM related to the Seat Backrest Motor Control Circuit Performance?
- Diagnosis can involve checking the seat backrest motor for proper operation, inspecting the wiring and connectors for any damage, and using a diagnostic tool to scan for specific error codes.
4. Can I repair OBDII code B1D87 RAM related to the Seat Backrest Motor Control Circuit Performance myself?
- Depending on your level of experience and tools available, you may be able to repair the issue yourself by replacing the faulty motor, repairing damaged wiring, or resetting the control module.
5. Is it safe to continue driving with OBDII code B1D87 RAM related to the Seat Backrest Motor Control Circuit Performance?
- It is not recommended to continue driving with this issue, as it may affect the functionality of the seat backrest adjustment and compromise safety and comfort while driving.
6. How much does it typically cost to repair OBDII code B1D87 RAM related to the Seat Backrest Motor Control Circuit Performance?
- The cost of repair can vary depending on the specific cause of the issue, but it may involve replacing the motor, repairing wiring, or reprogramming the control module, which can range from a few hundred to a few thousand dollars.
7. Can resetting the vehicle's computer system clear OBDII code B1D87 RAM related to the Seat Backrest Motor Control Circuit Performance?
- Resetting the computer system may temporarily clear the error code, but if the underlying issue is not addressed, the code is likely to reappear once the system detects the problem again.
8. Will disconnecting the battery reset OBDII code B1D87 RAM related to the Seat Backrest Motor Control Circuit Performance?
- Disconnecting the battery can sometimes reset the error code, but it is recommended to diagnose and address the root cause of the issue to prevent the code from reappearing.
9. Is there a recall or technical service bulletin related to OBDII code B1D87 RAM Seat Backrest Motor Control Circuit Performance?
- Check with your vehicle manufacturer or authorized service center to see if there are any recalls or technical service bulletins related to this specific OBDII code for your vehicle make and model.
10. Can environmental factors, such as extreme temperatures, cause OBDII code B1D87 RAM related to the Seat Backrest Motor Control Circuit Performance?
- While extreme temperatures can potentially affect the performance of electronic components, the most common causes of this error code are related to mechanical or electrical issues within the seat backrest motor control circuit.
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