how to fix my Ram 1500 DT (2019-Present) with a B1C91 code

Solution

1. Preparation

• Tools Required: OBD-II scanner, multimeter, socket set, torque wrench, safety glasses.
• Disconnect the vehicle's battery and allow it to sit for at least 10 minutes to ensure the airbag system is de-energized.

2. Inspect Wiring and Connectors

• Sub-steps:
  1. Locate the airbag connector and wiring harness under the driver's seat.
  2. Carefully disconnect the airbag connector and inspect for corrosion or damage.
  3. Use a multimeter to check for continuity in the wires leading to the airbag module.
  4. If any wires are damaged, replace them with OEM parts.

3. Replace Faulty Components

• If the airbag module is determined to be faulty:
  1. Remove the airbag module by unscrewing the securing bolts using a socket set.
  2. Disconnect the airbag module connectors.
  3. Install the new airbag module by connecting the wiring and securing it with bolts to the specified torque (refer to service manual for torque specifications).

4. Reconnect Battery and Clear Codes

• Reconnect the battery terminals and ensure they are tightened properly.
• Use the OBD-II scanner to clear the B1C91 code from the vehicle's system.

5. Test Airbag System

• Perform a function test of the airbag system using the OBD-II scanner to ensure no codes return and that the system operates correctly.