DTC Code C1937 – What does this code mean?

<ul> <li><a href="/problems/abs-light-is-on"><b>ABS Warning Light ON</b></a>: The Anti-Lock Brake System (ABS) warning light illuminates on the dashboard, indicating a potential issue with the ABS system. This symptom is linked to a malfunction in the front active stabilizer control ECU main relay power supply IC, which may affect the vehicle's stability control functions.</li> <li><a href="/problems/engine-warning-light-on"><b>Engine Light ON</b></a>: The engine light, also known as the Service Engine Soon warning light, turns on. This symptom suggests a problem with the vehicle's electronic control systems, specifically related to the power supply IC in the front active stabilizer control ECU. It may lead to compromised vehicle handling and stability.</li> </ul>

<ul><li>The Front Active Stabilizer Control ECU may be faulty, leading to improper relay power supply management.</li><li>A malfunctioning Front Active Stabilizer Relay can disrupt the power supply to the ECU, causing the error code.</li><li>The Rear Active Stabilizer Relay might also be faulty, affecting the overall stabilizer system performance.</li><li>An open or shorted harness in the Front Active Stabilizer Control ECU can interrupt the electrical flow, triggering the code.</li><li>Poor electrical connections in the Front Active Stabilizer Control ECU circuit can lead to inconsistent power supply and system errors.</li></ul>

<ul> <li><b>Verify DTC Code</b>: Confirm the presence of DTC C1937 using a diagnostic scan tool. Ensure no other related codes are present that might affect the diagnosis.</li> <li><b>Inspect Main Relay</b>: Check the main relay for the front active stabilizer control ECU. Ensure it is functioning correctly and there are no signs of damage or corrosion.</li> <li><b>Check Power Supply</b>: Measure the voltage at the power supply terminal of the front active stabilizer control ECU. Verify it matches the manufacturer's specifications.</li> <li><b>Examine Wiring and Connectors</b>: Inspect the wiring and connectors between the main relay and the ECU for any signs of damage, corrosion, or loose connections.</li> <li><b>Test ECU Functionality</b>: If the relay and wiring are intact, test the functionality of the front active stabilizer control ECU. Replace if necessary.</li> <li><b>Clear DTC and Test Drive</b>: After repairs, clear the DTC and perform a test drive to ensure the issue is resolved and the code does not return.</li></ul>

<p>The DTC C1937 indicates a <b>malfunction in the Front Active Stabilizer Control ECU Main Relay Power Supply IC</b>. This is a <b>critical issue</b> as it affects the vehicle's stability control system. Failure to address this can lead to <b>loss of vehicle control</b>, especially during cornering or on uneven surfaces, increasing the risk of accidents. Immediate attention is required to ensure vehicle safety.</p>