Engine-Codes - Lincoln - B140D Lincoln

B140D Lincoln Code - Second Row Passenger Side Seatbelt Sensor Circuit

- Code Popularity: 820 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
Table of contents
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What are the Possible Causes of the DTC B140D Lincoln?

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 Second Row Passenger Side Seatbelt
  • Second Row Passenger Side Seatbelt harness is open or shorted
  • Second Row Passenger Side Seatbelt circuit poor electrical connection
  • Faulty Restraint Control Module (RCM)

Code Tech Notes

B140D:11 Second Row Passenger Side Seatbelt Sensor Circuit Short to Ground
B140D:12 Second Row Passenger Side Seatbelt Sensor Circuit Short to Battery
B140D:13 Second Row Passenger Side Seatbelt Sensor Circuit Open
B140D:1D Second Row Passenger Side Seatbelt Sensor Circuit Current Out of Range

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How to Fix the DTC B140D Lincoln?

Check the 'Possible Causes' listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

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What is the Cost to Diagnose the Code?

Labor: 1.0

The cost to diagnose the B140D Lincoln code is 1.0 hour of labor. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. Most auto repair shops charge between $75 and $150 per hour.

What are Code Possible Symptoms?

  • Air Bag Warning Light ON

What Does the B140D Lincoln Code Mean?

The Restraint Control Module (RCM) continuously monitors the second row right safety belt buckle switch circuits for the following faults: Open circuit, Short to voltage, Short to ground, Current out of range, Faulted second row right safety belt buckle switch. If a fault is detected, the RCM stores DTC B140D in memory and sends a message to the IPC to illuminate the airbag warning indicator.

B140D Lincoln Code - Second Row Passenger Side Seatbelt Sensor Circuit

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Precautions for SRS “AIR BAG” and “SEAT BELT PRE-TENSIONER” Service

  • Never probe the electrical connectors on air bag, side air curtain modules or seat belts.
  • Never disassemble or tamper with safety belt buckle/retractor pretensioners, adaptive load limiting retractors, safety belt inflators, or probe the electrical connectors.
  • Do not use electrical test equipment to check SRS circuits unless instructed to in this Service Manual.
  • Before servicing the SRS, turn ignition switch OFF, disconnect both battery cables and wait at least 3 minutes. For approximately 3 minutes after the cables are removed, it is still possible for the air bag and seat belt pre-tensioner to deploy. Therefore, do not work on any SRS connectors or wires until at least 3 minutes have passed.
Failure to follow this instruction may result in the accidental deployment of these modules, which increases the risk of serious personal injury or death.