2022-2023 Honda Civic EPB Harness DTCs Investigation

American Honda Motor Co., Inc. (AHM) has initiated a parts collection program to investigate issues affecting the Electric Parking Brake (EPB) harness in certain 2022-2023 Honda Civic models. This effort, identified as "Request for Parts: 2022-2023 Civic EPB Harness DTCs (ACTION REQUIRED)", aims to gather specific components from vehicles exhibiting particular Diagnostic Trouble Codes (DTCs) and warning symptoms to better understand the underlying condition.

Symptoms of EPB Harness Issues

Owners of affected 2022-2023 Honda Civic vehicles may experience a range of symptoms. The most common indicators include the storage of specific DTCs related to the Electric Parking Brake system. In addition to these codes, drivers might observe intermittent or persistent warning lights on the Multi-Information Display (MID).

These warning lights can indicate various system malfunctions, such as general "brake system problems." Issues with advanced driver-assistance systems like the Lane Keeping Assist System (LKAS) and Adaptive Cruise Control (ACC) may also manifest as warning lights. These symptoms suggest a potential electrical or communication fault within the vehicle's systems, specifically impacting the EPB harness.

Diagnostic Trouble Codes (DTCs)

For a vehicle to be considered for this parts collection program, it must have specific DTCs stored in its system. These codes point directly to issues within the Electric Parking Brake Actuator circuit:

• C1110-13: This code indicates a "Left-Rear Electric Parking Brake Actuator Circuit Open." An open circuit means there is a break in the electrical path, preventing proper operation of the left-rear EPB actuator.
• C1100-94: This code signifies an "Electric Parking Brake Actuator Malfunction." This suggests a general fault or incorrect operation of the EPB actuator itself.

Trigger Conditions and Exclusions

AHM is interested in collecting parts only if the vehicle meets a strict set of requirements. These qualifiers ensure that the collected parts are relevant to the specific issue of the Honda Civic EPB harness DTCs:

• The vehicle must be equipped with an automatic transmission.
• Both DTCs C1110-13 and C1100-94 must be stored in the vehicle's system. An All-DTC Check printout must be provided to Technical Information & Support (TIS).
• FHEV, Si, and Type R trims are not accepted for this program.
• The vehicle must not have had previous replacements of the left rear brake assembly and knuckle assembly.
• The vehicle must not have been involved in a collision.
• No repairs or disassembling of the harness and motor related to this issue should have been attempted prior to the current visit.

What Owners Should Do

If you own a 2022-2023 Honda Civic and are experiencing warning lights such as "brake system problems," LKAS, or ACC lights, and suspect your vehicle may have the Honda Civic EPB harness DTCs C1110-13 or C1100-94 stored, you should visit your authorized Honda dealership. The dealership's service personnel will determine if your vehicle meets the specific qualifiers for this parts collection program.

If your vehicle qualifies, the dealership will contact AHM's Technical Information & Support (TIS) team. TIS will then provide further instructions for collecting the necessary vehicle information and parts. This process is crucial for Honda to gather data and ultimately develop a comprehensive solution for the Honda Civic EPB harness DTCs.

Important Warnings

This communication emphasizes that AHM wishes to collect certain parts prior to any repair attempt. This means that if your vehicle meets the qualifiers, dealers should not attempt to repair or disassemble the harness and motor for this issue before contacting TIS.

NHTSA ID: 11030078