c1112 trailer brake signal to trailer brake power control module circuit malfunction

C1112 Trailer Brake Signal to Trailer Brake Power Control Module Circuit Malfunction

OBD2 Code: C1112
Description: Trailer brake signal to trailer brake power control module circuit malfunction.
Definition: This code indicates a problem with the electrical circuit between the vehicle’s trailer brake signal and the trailer brake power control module. It suggests that there is an issue such as an open or short circuit, poor connection, or failure in the wiring or components involved in this system.

Typical Severity: Moderate

Common Causes

Common Causes:

Common Misdiagnosis

OBD2 Code: C1112

Description: Trailer brake signal to trailer brake power control module circuit malfunction

Common Misdiagnosis: Faulty trailer brake controller assumed instead of checking wiring issues or connections.

Common Diagnostic Steps

Description: Trailer Brake Signal to Trailer Brake Power Control Module Circuit Malfunction

Verify the fault code using an OBD-II scanner.
Inspect the trailer brake wiring harness for damage, corrosion, or disconnection.
Check the trailer brake power control module for proper operation and secure mounting.
Test the voltage and ground signals at the trailer brake connector using a multimeter.
Examine fuses related to the trailer braking system for any signs of being blown or damaged.
If applicable, inspect and test any associated relays in the circuit.
Ensure that all connections are clean, tight, and free from corrosion.
If necessary, replace faulty components such as connectors, wiring, or modules.
Clear the fault code and perform a road test to verify repair success.