AutoCodes – Mercury – B103C Mercury

B103C Mercury Code - Thermoelectric Driver Open Load

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: B103C Mercury indicates Thermoelectric Driver Open Load.
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 1,091

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 B103C 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). If the Dual Climate Controlled Seat Module (DCSM) detects an open circuit or high TED resistance, the following Diagnostic Trouble Code (DTC) will be set: DTC B103C (Thermoelectric Driver Open Load) - If DCSM outputs to the driver seat backrest or cushion TED or any components within these circuit loops are open, disconnected or a TED resistance greater than 90, 000 ohms is sensed, the DCSM continues normal operation and sets this DTC.

OBDII Code B103C Mercury - Thermoelectric Driver Open Load - AutoCodes.com — B103C Mercury Code - Thermoelectric Driver Open Load

What does this mean?

What are the Possible Causes of the DTC B103C 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 B103C 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 B103C 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 B103C Mercury Code

1. What are the common symptoms of OBDII code B103C in a Mercury vehicle?

- Common symptoms include issues with the thermoelectric system, such as inconsistent temperature control or a complete lack of heating or cooling.

2. What does the OBDII code B103C "Thermoelectric Driver Open Load" mean for a Mercury vehicle?

- This code indicates that there is an open circuit in the thermoelectric driver circuit, which can affect the operation of the heating and cooling system.

3. What are the possible causes of the B103C OBDII code in a Mercury?

- The code B103C can be triggered by a faulty thermoelectric driver, damaged wiring or connectors, or a malfunctioning thermoelectric module.

4. How can I diagnose the B103C OBDII code in my Mercury?

- Diagnosing this code typically involves inspecting the wiring and connectors related to the thermoelectric system, testing the thermoelectric driver, and checking for any visible damage.

5. Can I continue driving my Mercury with the B103C OBDII code present?

- It is not recommended to drive with the B103C code active, as it can lead to further issues with the thermoelectric system and affect the comfort and safety of the vehicle.

6. How can the B103C OBDII code be repaired in a Mercury?

- Repairing the B103C code often involves replacing the faulty thermoelectric driver, repairing any damaged wiring or connectors, or addressing issues with the thermoelectric module.

7. Are there any DIY tips for fixing the B103C OBDII code in a Mercury?

- DIYers with experience in automotive electrical systems may attempt to check and repair wiring connections, but it is recommended to consult a professional for a thorough diagnosis and repair.

8. How much does it typically cost to fix the B103C OBDII code in a Mercury?

- The cost of repairing the B103C code can vary depending on the specific issue, but it may range from $100 to $300 for parts and labor.

9. Can a B103C OBDII code reset itself in a Mercury?

- In some cases, if the underlying issue causing the code is resolved, the B103C code may clear itself after a certain number of successful drive cycles.

10. Is it important to address the B103C OBDII code promptly in a Mercury?

- Yes, it is important to address the B103C code promptly to prevent further damage to the thermoelectric system and ensure proper heating and cooling functions in the vehicle.