C1113 — ABS Power Relay Coil Short Circuit To Battery

The diagnostic trouble code C1113 indicates a short circuit in the ABS (Anti-lock Braking System) power relay coil to the vehicle’s battery. This fault usually points to an electrical issue within the ABS control circuit, potentially impacting the vehicle’s braking performance or ABS functionality. Note that the specific labeling of this code may vary between different vehicle manufacturers.

Manufacturer variations for trouble code C1113

The label for code C1113 may differ among vehicle brands and manufacturers, as each OEM (Original Equipment Manufacturer) employs unique diagnostic protocols and coding. The following are known variations:

• Volkswagen / Audi: « 01435 – ABS Pump Relay Circuit »
• Ford: « C1113 – ABS Power Relay Coil Short to Battery »
• Toyota: Specific label varies; often included under generic ABS relay codes.
• Hyundai / Kia: Variations similar to « U1612 » or « C1113 » in some models
• BMW: The code may appear as a generic ABS relay circuit fault; specific label varies.

What does trouble code C1113 mean?

In simple terms, the ECU (Engine Control Unit)—or more specifically, the ABS control module—monitors the electrical circuits that control the ABS relays and pumps. The C1113 code is triggered when the ECU detects a short circuit or a fault in the power relay coil circuit, which supplies electrical power to the ABS pump or other components. This short circuit often indicates an abnormal flow of electrical current, possibly caused by damaged wiring, relay faults, or issues within the relay coil itself.

This fault may appear during vehicle startup, after repairs, or spontaneously. It can also be caused by an intermittent electrical connection or component failure.

Severity and risks of trouble code C1113

The severity of C1113 depends on the vehicle’s make and model, as well as how essential the ABS system is for your driving conditions. A short circuit in the ABS relay coil can lead to loss of ABS functionality or even affect other related systems, such as electronic brake-force distribution. This can compromise your vehicle’s ability to prevent wheel lock-up during hard braking.

In some cases, the vehicle’s brake warning light might illuminate, and the ABS system may deactivate, reverting to a standard braking mode. While the vehicle can often still brake normally, the absence of ABS could increase stopping distances on slippery surfaces.

Overall, Yes, the vehicle can generally be driven, but caution is advised, especially in adverse conditions.

Symptoms of trouble code C1113

When this code is active, you might observe several Symptoms reflecting electrical or braking system issues:

• ABS warning light illuminated on the dashboard
• Brake warning light activated
• Unusual braking response, such as increased stopping distances
• Loss of ABS functionality during braking events
• Inconsistent brake pedal feel
• Possible electrical flickering or dashboard alerts related to ABS or brakes

Most likely causes of trouble code C1113

Understanding the potential causes helps pinpoint and resolve the issue effectively. The causes are listed, starting from the most common:

1. Damaged or corroded wiring in the ABS relay circuit – Exposure to moisture or vibration can deteriorate wiring, creating short circuits.
2. Faulty ABS relay coil – The relay coil itself may have suffered internal damage or degradation over time.
3. Shorted or damaged relay – The relay controlling the ABS pump might be physically damaged or internally shorted.
4. Electronic control module (ECU/ABS control unit) malfunction – In some cases, the ECU may generate false fault signals due to internal faults or software issues.
5. Battery or power supply problems – Voltage irregularities can cause relays and electrical circuits to malfunction.

How to diagnose trouble code C1113

Diagnosing this problem involves systematic checks to confirm the fault and identify its origin. Here are non-manufacturer-specific, safe diagnostic steps:

1. Perform a visual inspection of wiring harnesses, connectors, and relay components around the ABS system for signs of damage, corrosion, or disconnection.
2. Check fuse status associated with the ABS system; a blown fuse can mimic relay coil issues.
3. Use a diagnostic scanner capable of reading live data; monitor the ABS relay commands and relay coil signals during vehicle operation.
4. Test relay circuits using a multimeter for continuity and voltage, verifying correct power and ground signals present.
5. Inspect wiring continuity from the relay to the control module to ensure integrity and absence of shorts or opens.
6. Perform relay swap test with a known-good relay of the same type to see if the fault is relay-specific.
7. Check battery voltage and electrical system stability to eliminate voltage irregularities as a cause.

Possible repairs for trouble code C1113

Once the root cause is identified, repairs can be planned accordingly. These are typical solutions:

• Replace damaged wiring or connectors – This is a basic repair, suitable for DIY enthusiasts or technicians comfortable with electrical repairs.
• Install a new relay – If the relay coil or relay itself is faulty, replacement is often straightforward.
• Repair or replace the ABS control module – This is a more complex, professional-level task, often requiring specialised knowledge and equipment.
• Address electrical system issues – Repair or replace corroded or loose wiring, fuses, or battery connections.
• Upgrade or reset ECU software – Sometimes, reprogramming or updating the software can resolve false fault signals.

Vehicles commonly associated with trouble code C1113 in Europe

While this code is not specific to a single brand, certain European vehicles are more frequently associated with ABS relay circuit faults, especially those with older or high-mileage electrical systems. Common brands include:

• Volkswagen Group (Volkswagen, Audi, Skoda, Seat)
• Ford Europe
• Peugeot / Citroën
• BMW
• Mercedes-Benz
• Renault

Frequent mistakes with trouble code C1113

Diagnostics and repairs involving electrical circuits can be challenging. To avoid common pitfalls, consider these points:

• Assuming relay failure without visual inspection – Always confirm with wiring tests before replacing relays.
• Ignoring corrosion or damage in wiring harnesses – Electrical issues often stem from these causes and should be thoroughly examined.
• Overlooking the power supply – A weak or inconsistent battery or alternator can cause false faults.
• Using unverified or counterfeit replacement parts – Always source quality relays and connectors.
• Failing to clear codes after repair – Always clear codes and re-test to confirm the issue is resolved.

FAQ — trouble code C1113

Here are some common questions and their answers regarding this fault:

Can this code disappear on its own?

Typically, no. Once a short circuit or wiring fault occurs, the code remains until the underlying issue is repaired. Sometimes, temporary electrical interference may cause false readings, but persistent faults will trigger the code again.

Can I keep driving?

In most cases, yes, but with caution. The vehicle can usually still brake normally, but the ABS system may be deactivated, reducing braking assistance on slippery surfaces. If the warning lights are on, it is advisable to have the vehicle inspected soon.

Why does the code return after clearing?

This indicates that the underlying issue has not been resolved. The fault is persistent or intermittent, requiring further diagnosis and repair of electrical wiring, relays, or the ABS module itself.