What Does C1113 Mean?
This code indicates the ABS control module detected an unwanted voltage (battery power) on the ABS power relay coil circuit when it should not be present. The ABS module monitors the relay coil control circuit and has detected a short to battery voltage, meaning the circuit is receiving power from an unintended source. This prevents proper control of the ABS pump motor relay and can disable ABS functionality entirely.
Safety Warning
ABS system is likely disabled, meaning wheels can lock during hard braking and vehicle stopping distance may increase significantly on wet or slippery surfaces. Standard braking function typically remains operational but without anti-lock protection. Repair urgently as this represents a critical safety system failure.
Common Causes
45%
Damaged or chafed wiring harness causing short to battery voltage between ABS module and relay
30%
Failed ABS power relay with internal short circuit
15%
Corroded or shorted connector pins at ABS module or relay socket
10%
Failed ABS control module with internal driver circuit fault
Diagnostic Steps
1
Step 1: Perform visual inspection of ABS power relay, relay socket, and all associated wiring for obvious damage, corrosion, melted terminals, or chafed insulation. Check for aftermarket wiring modifications or improper repairs near the ABS relay location.
2
Step 2: Remove ABS power relay and use a digital multimeter to check for continuity between the relay coil control terminal and battery positive with ignition off. Reading should show infinite resistance (open circuit). Any continuity indicates a short to battery voltage in the harness.
3
Step 3: With relay removed and ignition on, backprobe the relay coil control circuit at the relay socket using a multimeter set to DC voltage. Normal reading should be 0-1 volts with ABS inactive. Reading of 12+ volts confirms short to battery in wiring harness or module failure.
4
Step 4: If wiring tests pass, swap the ABS power relay with a known-good relay of same specification and clear codes. Test drive and monitor for code return to verify relay fault. If code returns immediately, suspect ABS module internal fault.
5
Step 5: Inspect wiring harness routing for contact points with sharp edges, heat sources, or moving components. Use wiring diagrams to trace the relay coil control circuit from module to relay for pinched or damaged sections.
6
Step 6: After repairs, clear codes and perform ABS system self-test using scan tool active tests. Verify relay operation by commanding ABS pump on/off and monitoring current draw (typically 85-100mA for relay coil). Confirm no codes return and ABS warning lamp extinguishes.
Estimated Repair Cost
$150 - $800
Parts + labor, varies by vehicle and location
This code indicates the ABS control module detected an unwanted voltage (battery power) on the ABS power relay coil circuit when it should not be present. The ABS module monitors the relay coil control circuit and has detected a short to battery voltage, meaning the circuit is receiving power from a...
The most common cause of C1113 (ABS Power Relay Coil Short Circuit To Battery) is: Damaged or chafed wiring harness causing short to battery voltage between ABS module and relay
Typical repair costs for C1113 range from $150 to $800, depending on the vehicle, location, and whether you do it yourself or go to a shop.
ABS system is likely disabled, meaning wheels can lock during hard braking and vehicle stopping distance may increase significantly on wet or slippery surfaces. Standard braking function typically remains operational but without anti-lock protection. Repair urgently as this represents a critical safety system failure.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to C1113 to identify the root cause.
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Quick Info
Category
Chassis
System
Anti-lock Brake System (ABS)
Difficulty
Type
Manufacturer
Recommended Tools
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