Engine-Codes - Mercury - B11D8 MERCURY

B11D8 MERCURY Code - Restraint Event Notification

- Code Popularity: 462 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
Table of contents

|What are the Possible Causes of the B11D8 MERCURY Code?

  • Faulty Restraint Control Module (RCM)
  • Restraint Control Module (RCM) harness is open or shorted
  • Restraint Control Module (RCM) circuit poor electrical connection
  • Fualty Battery Energy Control Module (BECM)

|How to Fix the B11D8 MERCURY Code?

Start by checking 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.

|B11D8 MERCURY code tech notes

B11D8:36 Restraint Event Notification Signal Frequency Too Low
B11D8:37 Restraint Event Notification Signal Frequency Too High
B11D8:38 Restraint Event Notification Signal Frequency Incorrect
B11D8:11 Restraint Event Notification Circuit Short to Ground
B11D8:15 Restraint Event Notification Circuit Short to Battery or Open

|What is the cost to diagnose the B11D8 MERCURY code?

Labor: 1.0

The cost to diagnose the B11D8 MERCURY code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.

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|What are B11D8 MERCURY code possible symptoms?

  • Air Bag Warning Light ON

|What Does the B11D8 MERCURY Code Mean?

The Battery Energy Control Module (BECM) monitors the impact notification output from the Restraint Control Module (RCM). The RCM outputs a Pulse Width Modulation (PWM) voltage on the circuit based on status. If the BECM senses the frequency is out of range, will illuminate the powertrain malfunction (wrench) warning indicator and set a Diagnostic Trouble Code (DTC).

Restraint Event Notification

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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.