AutoCodes – Mercury – B103B Mercury

B103B Mercury Code - Thermoelectric Driver Overcurrent Low

Quick Answer

The seat cushion and backrest are equipped with a Thermo-Electric Device (TED) Assembly that includes a seat blower (fan motor, serviced as an assembly with the TED). Common causes include Faulty Thermo-Electric Device (TED) Assembly, Thermo-Electric Device (TED) Assembly harness is open or shorted, Thermo-Electric Device (TED) Assembly circuit poor electrical connection. Severity is Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

What it means: B103B Mercury indicates Thermoelectric Driver Overcurrent Low.
Common causes: Common causes include Faulty Thermo-Electric Device (TED) Assembly, Thermo-Electric Device (TED) Assembly harness is open or shorted, Thermo-Electric Device (TED) Assembly circuit poor electrical connection.
Severity: Low - monitor the vehicle and repair when practical.
Can I drive?: The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

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Code Popularity 1,061

How popular is this code, among other codes? Low

Repair Importance Level

Low (Monitor) (1 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Nov 18, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B103B Mercury Description

The seat cushion and backrest are equipped with a Thermo-Electric Device (TED) Assembly that includes a seat blower (fan motor, serviced as an assembly with the TED). When the Dual Climate Controlled Seat Module (DCSM) detects an overcurrent and/or overtemperature in the output circuits to the TEDs, it will disable the affected seat and set the following DTCs: DTC B103B (Thermoelectric Driver Overcurrent Low) If DCSM outputs to the driver seat backrest or cushion TED or any components within these circuit loops are shorted to ground or a TED resistance of less than 0.9 ohm is sensed, the DCSM shuts down the driver seat system and sets this DTC.

OBDII Code B103B Mercury - Thermoelectric Driver Overcurrent Low - AutoCodes.com — B103B Mercury Code - Thermoelectric Driver Overcurrent Low

What does this mean?

What are the Possible Causes of the DTC B103B Mercury?

Faulty Thermo-Electric Device (TED) Assembly
Thermo-Electric Device (TED) Assembly harness is open or shorted
Thermo-Electric Device (TED) Assembly circuit poor electrical connection
Faulty Dual Climate Controlled Seat Module (DCSM)

How to Fix the DTC B103B 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 B103B 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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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about B103B Mercury Code

1. What are common symptoms of OBDII code B103B in a Mercury vehicle?

- Common symptoms include the Check Engine Light illuminating, poor vehicle performance, and potential issues with the thermoelectric system.

2. What does the OBDII code B103B Mercury "Thermoelectric Driver Overcurrent Low" indicate?

- This code indicates that there is a low current condition detected in the thermoelectric driver circuit in the vehicle.

3. What are possible causes of OBDII code B103B in a Mercury vehicle?

- Possible causes include faulty thermoelectric components, damaged wiring or connectors in the thermoelectric system, or a malfunctioning thermoelectric driver module.

4. How can I diagnose OBDII code B103B in my Mercury vehicle?

- Diagnosis typically involves using an OBDII scanner to retrieve the code, inspecting the thermoelectric components for damage, and testing the wiring and connectors for continuity.

5. Is it safe to continue driving with OBDII code B103B present in a Mercury vehicle?

- It's recommended to address the issue promptly to prevent further damage to the thermoelectric system and ensure optimal vehicle performance.

6. Can I repair OBDII code B103B in my Mercury vehicle myself?

- Depending on your experience and tools available, you may be able to repair this code yourself by replacing faulty components, repairing damaged wiring, or addressing connector issues.

7. How much does it typically cost to repair OBDII code B103B in a Mercury vehicle?

- Repair costs can vary depending on the underlying cause, but they may range from a few hundred to over a thousand dollars if professional assistance is required.

8. Are there any preventive maintenance steps to avoid OBDII code B103B in a Mercury vehicle?

- Regularly inspecting the thermoelectric system, ensuring proper maintenance of the vehicle's electrical components, and addressing any issues promptly can help prevent this code from appearing.

9. Can OBDII code B103B in a Mercury vehicle affect fuel efficiency?

- Yes, if left unaddressed, this code can potentially impact fuel efficiency due to the compromised performance of the thermoelectric system.

10. How long does it typically take to repair OBDII code B103B in a Mercury vehicle?

- Repair times can vary depending on the complexity of the issue and the availability of parts, but it may take a few hours to a day for professionals to diagnose and resolve the problem.