C1113 — ABS Power Relay Coil Short Circuit To Battery #

The wording for this DTC may vary depending on the manufacturer and the diagnostic tool used.

• ABS Power Relay Coil Circuit Short to Battery (Nissan, Infiniti)
• ABS Relay Circuit Shorted to Battery (Mazda)
• ABS Power Supply Relay Coil Shortage to Battery (Hyundai, Kia)
• ABS Power Relay Short to Battery (Mitsubishi)

Summary of DTC C1113 #

The C1113 diagnostic trouble code (DTC) flags a fault detected by the vehicle’s Anti-lock Braking System (ABS) module. Specifically, this code indicates that the control module has sensed a short circuit between the ABS power relay coil and the battery voltage supply. The ABS power relay is an electro-mechanical switch that enables or disables power to the ABS hydraulic control unit. When its coil is shorted to battery, the system may experience uncommanded ABS activation, loss of ABS function, or even a no-start condition in some vehicles. Prompt investigation and repair are vital to ensure your braking system remains safe and reliable.

Common Symptoms for DTC C1113 #

A C1113 code can trigger a range of symptoms, depending on your vehicle’s design and how severely the circuit is shorted. Most drivers encounter subtle to obvious warning signs that should not be ignored. Look out for:

• ABS warning light illuminated on the dashboard
• ABS function disabled (brakes operate without anti-lock feature)
• Traction control and/or stability control warning lights
• Unexpected ABS activation or ABS pump running continuously
• Possible no-start or delayed start (in rare cases)
• Unusual relay clicking sounds from under the hood

Probable Causes for C1113 #

When the ABS module logs a C1113, it’s signaling a specific electrical problem: the relay coil circuit is receiving full battery voltage when it shouldn’t. The most common culprits, in order of probability, include:

1. Faulty ABS power relay (internal short in the relay coil)
2. Damaged or shorted wiring harness between relay and battery, or relay and ABS module
3. Corroded or contaminated relay socket causing unintended current paths
4. Incorrect or failed ABS module (rare, but possible with internal shorts)
5. Aftermarket electrical modifications interfering with the relay circuit

Step-by-Step Diagnosis for C1113 #

Accurate diagnosis is the only way to prevent unnecessary part replacements. Here’s a systematic approach used by professional technicians:

1. Confirm the code and clear it with a scan tool. Cycle the ignition and see if it returns.
2. Locate the ABS power relay using your vehicle’s wiring diagram or owner’s manual.
3. Inspect the relay visually for signs of heat damage, melting, or corrosion.
4. Test the relay coil resistance with a multimeter (verify against OEM specs).
5. Check the relay socket for contamination, corrosion, or bent pins.
6. Inspect wiring harnesses from the relay to the ABS module and battery for damage, pinched wires, or aftermarket splices.
7. Test for voltage at the relay coil terminals with ignition ON and OFF; compare results to expected values.
8. If all above checks are normal, test the ABS module’s control circuit for internal faults (OEM scan tool may be required).

Possible Repairs for C1113 #

Repairs should directly address the underlying electrical problem. Depending on your findings, you may need to:

• Replace the ABS power relay if resistance is out of spec or it shows physical damage
• Repair or replace damaged wiring between the relay, ABS module, and battery
• Clean or replace the relay socket to restore clean electrical contact
• Replace the ABS control module if it is confirmed faulty (rare)
• Remove or correct aftermarket modifications affecting the relay circuit

Is It Safe to Drive with Code C1113? #

Driving is limited and not recommended while this code is present. Although your base brakes may still operate, ABS and related stability features are disabled. In emergency stops or slippery conditions, this increases your risk of wheel lockup and loss of control. Additionally, some vehicles may enter limp mode or even refuse to start if the relay circuit is significantly damaged. Address the issue as soon as possible to ensure your safety.

Vehicles Most Commonly Affected by C1113 #

While any vehicle with ABS can suffer from this fault, it’s most frequently reported on certain makes and models, particularly those using similar relay and module designs. Examples include:

• Nissan Altima, Maxima, Murano, Pathfinder
• Infiniti G35, FX35, QX60
• Mazda 3, Mazda 6, CX-5
• Hyundai Sonata, Elantra, Santa Fe
• Kia Optima, Sorento
• Mitsubishi Outlander, Lancer

Common Mistakes & Best Practices for C1113 #

Misdiagnosis is frequent when troubleshooting electrical codes like C1113. Avoid unnecessary expenses and frustration by keeping these tips in mind:

• Don’t replace the ABS module without confirming the relay and wiring are healthy.
• Always check for aftermarket alarms, remote starts, or audio systems that could affect the ABS relay circuit.
• Use OEM relays whenever possible; aftermarket relays may not meet exact specifications.
• Document connector pin positions and wire colors before making repairs.
• Clear all codes and retest after each repair step to verify the fix.

FAQ for DTC C1113 #

Here are quick answers to the most common questions about this code:

• Q: Can a weak battery cause C1113?
  A: A weak battery alone is unlikely to cause this code, but low voltage can stress relays and electronics, occasionally triggering related faults.
• Q: Is it safe to bypass the ABS relay to clear the code?
  A: No, bypassing the relay defeats the safety systems and can cause severe brake issues. Always restore the circuit to OEM standards.
• Q: Will replacing the relay always fix the problem?
  A: Not always. If wiring or the ABS module itself is at fault, the code and symptoms will persist until all faults are repaired.