C1112

Code

Other C — Chassis

ABS Power Relay Coil Short Circuit To Ground

Brand: Other

Type: C — Chassis

Views: UK: 33 EN: 45 RU: 39

AI status

Completed

ready

Completed 100%

Page language: EN

Visual inspection of relay, relay socket and wiring for damage, corrosion, or melting
Check related fuses for continuity and signs of heat damage
Verify ABS warning light status and any other linked warning lights
Perform voltage check at relay supply and coil terminals with ignition ON
Measure coil resistance and check for short to ground with a multimeter

Relay coil resistance (typical): ~50–200 ohms (manufacturer-specific — consult service data)
Coil supply voltage with key ON: ~12 V (or battery voltage), negligible voltage at coil ground when relay is not energized
Short-to-ground condition: near 0 ohms between coil terminal and chassis ground
Connector terminal voltage at power feed: battery voltage with ignition ON
No high current draw from fuse/circuit when relay not energized (except nominal coil current when energized)

Record freeze frame or stored ABS-related codes and clear codes to see if C1112 returns.
Perform a visual inspection: remove ABS relay and inspect socket, wiring harness, and connectors for damaged insulation, corrosion, melted plastic or aftermarket splices.
Check the ABS-related fuse(s) for continuity and inspect for signs of overheating. Replace if blown and re-test to reproduce the fault.
With the ignition OFF, disconnect the relay. Using an ohmmeter, check resistance between the coil terminals (if marked) and between each coil terminal and chassis ground. A soft short is indicated by near 0 ohms to ground.
With the relay removed, and ignition ON, measure voltage at the relay socket power terminal (should be battery voltage). Measure the coil ground terminal for unexpected continuity to ground. If the coil ground is hard shorted, suspect wiring or module driver.
If wiring looks intact, temporarily substitute a known-good relay of the correct type and re-check system operation and for recurrence of code.
If the short persists with a good relay and wiring checks OK, isolate the ABS module by disconnecting its connector(s) and re-check for short at the relay circuit. If the short clears when the module is disconnected, the module driver is likely faulty.
Repair identified wiring damage, connector issues, or replace faulty relay or ABS module as required. After repair, clear codes and road-test to verify problem resolved and code does not return.