What Does C1107 Mean?
This code indicates the ABS control module has detected a fault in the input circuit that signals whether the ABS system should be enabled or disabled. This circuit typically receives input from a switch, relay, or control module that determines ABS activation status. The ABS module is unable to properly read or validate the enable/disable command signal due to an electrical circuit malfunction.
Common Causes
35%
Faulty ABS enable/disable switch or relay with internal failure, corroded contacts, or mechanical wear
30%
Damaged wiring harness, broken wires, or corroded connections in the ABS enable circuit between switch and module
20%
Failed ABS control module with internal circuit board damage or corrupted software affecting input processing
10%
Low system voltage or poor ground connection causing inadequate signal voltage to ABS module enable circuit
5%
Blown fuse or faulty power distribution to ABS enable circuit preventing proper signal transmission
Diagnostic Steps
1
Step 1: Perform visual inspection of ABS enable switch/relay location and all associated wiring harnesses for physical damage, corrosion, loose connections, or water intrusion. Check fuse box for blown ABS-related fuses.
2
Step 2: Using a digital multimeter, measure battery voltage at the ABS module connector (should be 12-14V with engine running). Test all ground connections for continuity to chassis ground (less than 1 ohm resistance).
3
Step 3: Locate the ABS enable input circuit wire at the ABS module connector (refer to wiring diagram). Backprobe the enable signal wire and measure voltage with ignition on: should read battery voltage or ground depending on switch state. Toggle switch if accessible and verify voltage change.
4
Step 4: Disconnect ABS enable switch/relay and test for internal continuity using multimeter in ohms mode. Check for open circuit (infinite resistance) indicating switch failure, or test relay coil resistance (typically 50-120 ohms).
5
Step 5: Perform continuity test on enable circuit wiring from switch connector to ABS module connector with both ends disconnected. Should read less than 5 ohms. Check for short to ground or short to power (should be infinite resistance).
6
Step 6: If all circuits test normal, suspect ABS module internal failure. Clear codes, perform ABS module relearn/initialization procedure if available, then road test. If code returns immediately with known-good circuits, replace ABS control module and reprogram if required.
Estimated Repair Cost
$100 - $800
Parts + labor, varies by vehicle and location
This code indicates the ABS control module has detected a fault in the input circuit that signals whether the ABS system should be enabled or disabled. This circuit typically receives input from a switch, relay, or control module that determines ABS activation status. The ABS module is unable to pro...
The most common cause of C1107 (ABS Function Enabled Input Circuit Failure) is: Faulty ABS enable/disable switch or relay with internal failure, corroded contacts, or mechanical wear
Typical repair costs for C1107 range from $100 to $800, depending on the vehicle, location, and whether you do it yourself or go to a shop.
The vehicle is drivable but ABS functionality may be disabled or intermittent, resulting in reduced braking control on slippery surfaces and increased stopping distances during panic braking. Repair should be completed within a few days to restore full brake system safety features.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to C1107 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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