B112A Mercury Code - Ignition On Relay 'B' Circuit Short To Battery
Quick Answer
Conventional Ignition Switch: The ignition switch is a multiple position rotary switch that is controlled by a lock cylinder and a key. Common causes include Faulty Ignition On Relay 'B', Ignition On Relay 'B' harness is open or shorted, Ignition On Relay 'B' circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- B112A Mercury indicates Ignition On Relay 'B' Circuit Short To Battery.
- Common causes
- Common causes include Faulty Ignition On Relay 'B', Ignition On Relay 'B' harness is open or shorted, Ignition On Relay 'B' circuit poor electrical connection.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code B112A Mercury Description
The ignition switch is a multiple position rotary switch that is controlled by a lock cylinder and a key. The ignition switch provides voltage to the ACC, ON, or START-designated circuits depending on the position it is placed. The Body Control Module (BCM) calculates the positions based on the voltage received from the ACC and ON-designated circuits.
The key removal inhibit solenoid (also known as the key release interlock actuator) is an electronically controlled solenoid that prevents the ignition lock cylinder from being turned to the OFF position unless the gear selector lever is in the PARK position. The key removal inhibit solenoid is part of the ignition switch.
Push Button Ignition Switch:
The push button ignition switch is used instead of a conventional ignition switch to achieve the various ignition modes. The push button ignition switch is a momentary dual contact switch. Both sets of contacts are normally open and receive the voltage at all times. When the START/STOP button is pressed, the voltage is sent to the BCM, the RFA module, and the PCM to indicate a button press.
The ignition switch has a LED for switch illumination when the backlighting is activated.
What are the Possible Causes of the DTC B112A Mercury?
- Faulty Ignition On Relay 'B'
- Ignition On Relay 'B' harness is open or shorted
- Ignition On Relay 'B' circuit poor electrical connection
- Faulty Body Control Module (BCM)
How to Fix the DTC B112A Mercury?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the B112A Mercury code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about B112A Mercury Code
1. What are the common symptoms of OBDII code B112A in a Mercury vehicle?
- Common symptoms include difficulty starting the engine, stalling, or the engine not turning over.
2. What does the OBDII code B112A for Ignition On Relay 'B' Circuit Short To Battery mean in a Mercury?
- This code indicates that there is a short circuit between the ignition on relay 'B' and the battery in the vehicle.
3. What are some possible causes of OBDII code B112A in a Mercury?
- Possible causes include damaged wiring or connectors, a faulty ignition on relay 'B', or a short circuit in the circuit.
4. How can I diagnose the issue related to OBDII code B112A in my Mercury?
- Use a diagnostic scanner to retrieve the specific fault codes, inspect the wiring and connectors for any damage, and test the ignition on relay 'B' for proper functionality.
5. Can I still drive my Mercury with the OBDII code B112A present?
- It is not recommended to drive the vehicle with this code present, as it can lead to potential starting or stalling issues.
6. How can I repair the Ignition On Relay 'B' Circuit Short To Battery issue in my Mercury?
- Repair options include repairing or replacing damaged wiring, replacing the faulty ignition on relay 'B', and clearing the fault codes with a diagnostic scanner.
7. Is it possible to reset the OBDII code B112A in a Mercury without fixing the underlying issue?
- While you can clear the fault code with a diagnostic scanner, it is important to address the underlying issue to prevent it from reoccurring.
8. Will fixing the OBDII code B112A issue in my Mercury be costly?
- The cost of repairs can vary depending on the exact cause of the issue, but it is recommended to address it promptly to avoid potential further damage.
9. Can a DIY enthusiast fix the OBDII code B112A problem in a Mercury?
- Depending on the individual's skill level and access to tools, some DIY enthusiasts may be able to diagnose and repair the issue, but professional help is recommended for complex electrical issues.
10. How can I prevent the OBDII code B112A from appearing in my Mercury in the future?
- Regular vehicle maintenance, including checking the wiring and connectors for damage, can help prevent issues like the Ignition On Relay 'B' Circuit Short To Battery from occurring.
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