B1D77 Chrysler Code - Seat Recliner Position Sensor Circuit
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 Seat Recliner Position Sensor, Seat Recliner Position Sensor harness is open or shorted, Seat Recliner Position Sensor 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
- B1D77 Chrysler indicates Seat Recliner Position Sensor Circuit.
- Common causes
- Common causes include Faulty Seat Recliner Position Sensor, Seat Recliner Position Sensor harness is open or shorted, Seat Recliner Position Sensor 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 B1D77 Chrysler 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 B1D77 Chrysler?
- Faulty Seat Recliner Position Sensor
- Seat Recliner Position Sensor harness is open or shorted
- Seat Recliner Position Sensor circuit poor electrical connection
- Faulty Driver Recliner Seat Adjuster Motor
- Faulty Memory Seat Module-Driver (MSMD)
How to Fix the DTC B1D77 Chrysler?
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.
Code Tech Notes
B1D77-12 SEAT RECLINER POSITION SENSOR CIRCUIT SHORT TO BATTERY
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the B1D77 Chrysler 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 B1D77 Chrysler Code
1. What are the common symptoms of OBDII code B1D77 Chrysler related to the Seat Recliner Position Sensor Circuit?
- Common symptoms include inaccurate seat recliner position display, malfunctioning seat adjustment controls, and warning lights on the dashboard.
2. What are the possible causes of the B1D77 Chrysler code for the Seat Recliner Position Sensor Circuit?
- Potential causes may include a faulty recliner position sensor, damaged wiring or connectors, loose connections, or a defective control module.
3. How can I diagnose the issue causing the B1D77 Chrysler code for the Seat Recliner Position Sensor Circuit?
- Diagnose by visually inspecting the wiring and connectors, checking the recliner position sensor for proper operation, and using a diagnostic scanner to retrieve specific fault codes.
4. What are some DIY repair tips for addressing the B1D77 Chrysler code related to the Seat Recliner Position Sensor Circuit?
- DIY repair tips include checking and repairing any damaged wiring or connectors, ensuring all connections are secure, and replacing the recliner position sensor if necessary.
5. Is it safe to drive my vehicle with the B1D77 Chrysler code triggered by the Seat Recliner Position Sensor Circuit issue?
- It is not recommended to drive the vehicle with this code active, as it can affect the proper functioning of the seat adjustment system and compromise safety.
6. Can resetting the OBDII codes clear the B1D77 Chrysler code linked to the Seat Recliner Position Sensor Circuit?
- Resetting the codes may temporarily clear the fault code, but if the underlying issue is not addressed, the code is likely to reappear.
7. How much does it typically cost to repair the B1D77 Chrysler code related to the Seat Recliner Position Sensor Circuit?
- Repair costs can vary depending on the specific cause of the issue, but it is recommended to consult a professional technician for an accurate diagnosis and cost estimate.
8. Are there any recalls or technical service bulletins (TSBs) related to the B1D77 Chrysler code for the Seat Recliner Position Sensor Circuit?
- It is advisable to check with Chrysler or authorized service centers for any recalls or TSBs related to this specific OBDII code to see if your vehicle is affected.
9. Can a malfunctioning Seat Recliner Position Sensor Circuit impact other vehicle systems?
- While the primary impact is on the seat adjustment system, a faulty sensor circuit can affect other related systems and may trigger additional fault codes.
10. How can I prevent the recurrence of the B1D77 Chrysler code associated with the Seat Recliner Position Sensor Circuit in the future?
- Regularly inspecting and maintaining the seat recliner position sensor, wiring, and connectors can help prevent the reoccurrence of this OBDII code.
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