C1112
ABS Power Relay Coil Short Circuit To Ground
Chassis Chassis/Safety ABS Relay Circuit 🔴 Serious — Stop or limit driving
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What This Actually Means
In plain language — no jargon

The ABS power relay coil has an unwanted electrical connection to ground, like a short circuit in a light switch that causes it to fail. This prevents the ABS system from receiving power when needed, disabling anti-lock braking protection.

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Symptoms You May Notice
3 known symptoms for this code
ABS warning light illuminated on dashboard
Loss of anti-lock braking function; wheels lock up during hard braking
Possible loss of traction control or stability control features
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Embedded Systems Insight
What the ECU/ECM is actually computing

The ECU monitors the ABS power relay coil circuit for proper resistance and voltage levels when the relay should be energized. If resistance drops abnormally or voltage collapses to ground unexpectedly, a short circuit is detected. The ECU continuously checks coil integrity during system initialization and operation.

Voltage & Parameter Thresholds

Parameter Normal Range Fault Condition
ABS Relay Coil Resistance 70-90 ohms Less than 10 ohms or 0 ohms (short to ground)
Relay Coil Supply Voltage 12-14.4V when energized 0V or voltage collapses unexpectedly
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Diagnostic & DIY Fix Guide
Check these in order — from cheapest to most complex
1
Wiring harness and connectors
Inspect the ABS relay connector and wiring for damaged insulation, corrosion, or moisture causing a short; repair or replace as needed.
2
ABS Power Relay
Test relay resistance with a multimeter; if shorted internally, replace the relay with OEM specification part.
3
ABS Control Module ground connections
Check and clean all ground connections at the ABS module and fuse box for corrosion or loose terminals that could cause fault signal.