AutoCodes - OBDII Code List - B140D MERCURY

B140D MERCURY - Second Row Passenger Side Seatbelt Sensor Circuit

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3    What is this?
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B140D MERCURY Possible 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)

How do I fix code B140D MERCURY

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's pins.

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

Cost of diagnosing the B140D MERCURY code

Labor: 1.0

The cost of diagnosing the B140D MERCURY code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle's make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.

Possible Symptoms

  • Air Bag Warning Light ON

B140d Mercury Description

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.
OBDII Code B140d Mercury - Second Row Passenger Side Seatbelt Sensor Circuit - AutoCodes.com

B140D MERCURY More Information

Need more information on how to fix the B140D MERCURY code?
Get Access to Factory Service Manuals

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.

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