B1123 Mercury: Code Meaning, Causes, Symptoms, & Tech Notes

|What are the Possible Causes of the Code B1123 Mercury?

Faulty Restraints Ignition Relay
Restraints Ignition Relay harness is open or shorted
Restraints Ignition Relay circuit poor electrical connection
Faulty Restraints Control Module (RCM)

|How to Fix the B1123 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.

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|Code B1123 Mercury Tech Notes

B1123:11 Restraints Ignition Relay: Circuit Short to Ground
B1123:12 Restraints Ignition Relay: Circuit Short to Battery

|What is the Cost to Diagnose the Code B1123 Mercury?

Labor: 1.0

The cost to diagnose the B1123 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 Code B1123 Mercury Possible Symptoms?

Air Bag Warning Light ON

|What Does the B1123 Mercury Code Mean?

The Battery Energy Control Module (BECMB) provides battery voltage to the Restraints Control Module (RCM) and, if equipped, Passenger Airbag Deactivation (PAD) indicator (vehicles without center stack display only). The BECMB monitors each circuit for a short to voltage or a short to ground. If a fault is detected, the BECMB stores the appropriate Diagnostic Trouble Code (DTC) in memory and sends a message to the RCM over HS-CAN1 and HS-CAN2, indicating that a BECMB fault is present.

B1123 Mercury Code - Restraints Ignition Relay

|Need more Information on the B1123 Mercury Code?

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|Need Help with the B1123 Mercury Code?

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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.