AutoCodes.com | All About OBDII Engine Codes
AutoCodes - Dodge - B1D77 Dodge

B1D77 Dodge Code - Seat Recliner Position Sensor Circuit

- Code Popularity: 397 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
Table of contents
Share on Facebook   Share on Twitter   Share on Linkedin

What are the Possible Causes of the DTC B1D77 Dodge?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • 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)
⚠ Does your Dodge have Safety Recalls? → Check here

How to Fix the DTC B1D77 Dodge?

Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.

Code Tech Notes

B1D77-11 SEAT RECLINER POSITION SENSOR CIRCUIT SHORT TO GROUND
B1D77-12 SEAT RECLINER POSITION SENSOR CIRCUIT SHORT TO BATTERY

Search for B1D77 Dodge Questions and Answers: Search here →

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B1D77 Dodge code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.

What are Code Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

Code B1D77 Dodge Description

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. The motors each contain a hall-effect position sensor. The hall-effect position sensor provides feedback to the MSMD in relation to the motors position.
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.

OBDII Code B1D77 Dodge - Seat Recliner Position Sensor Circuit - AutoCodes.com
B1D77 Dodge Code - Seat Recliner Position Sensor Circuit

Need More Information on the Code?

Need more information on how to fix the B1D77 Dodge code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1D77 Dodge code diagnosed by a professional: Find a repair shop in your area

Code B1D77 Dodge comments

Help us improve AutoCodes.com. Leave a comment below or tell us if the information above helps you fix the code. What are the symptoms on your vehicle for the B1D77 Dodge code? Have you replaced any parts?
Any information is appreciated. Thanks