DTC Code C100F – What does this code mean?

<ul> <li><b>Anti-Lock Brake System (ABS) Warning Light ON</b>: The ABS warning light illuminates when the brake pedal angle sensor supply is compromised. This can affect the vehicle's ability to manage braking force distribution, potentially leading to reduced braking efficiency. <causes> may include a faulty brake pedal angle sensor, wiring issues, or a malfunctioning ABS control module.</li> <li><b>Engine Light ON (or Service Engine Soon Warning Light)</b>: The engine light or service engine soon warning light may turn on due to the brake pedal angle sensor supply issue. This indicates a broader system fault that could impact vehicle performance. <causes> may involve sensor supply voltage problems, damaged connectors, or issues within the vehicle's electronic control unit (ECU).</li> </ul>

<ul><li>The brake pedal angle sensor may be faulty, leading to incorrect readings or no signal at all.</li><li>An open or shorted harness in the brake pedal angle sensor can disrupt the signal transmission.</li><li>Poor electrical connections in the brake pedal angle sensor circuit can cause intermittent or no signal issues.</li></ul>

<ul> <li><b>Initial Inspection</b>: Visually inspect the brake pedal angle sensor and its wiring for any obvious signs of damage, wear, or disconnection.</li> <li><b>Check for Short to Ground</b>: Using a multimeter, measure the resistance between the sensor supply circuit and ground. A low resistance indicates a short to ground (C100F:11).</li> <li><b>Check for Short to Battery</b>: Measure the voltage between the sensor supply circuit and ground. A voltage reading close to the battery voltage indicates a short to battery (C100F:12).</li> <li><b>Inspect Sensor Connector</b>: Disconnect the sensor connector and inspect for corrosion, bent pins, or other damage. Clean or repair as necessary.</li> <li><b>Test Sensor Supply Voltage</b>: With the ignition on, measure the supply voltage at the sensor connector. It should match the specified voltage in the service manual.</li> <li><b>Check Sensor Ground</b>: Ensure the sensor ground circuit has continuity to the chassis ground. Repair any open circuits.</li> <li><b>Replace Sensor</b>: If all wiring and connections are intact and the issue persists, replace the brake pedal angle sensor and clear the DTC code.</li></ul>

<p>The DTC code C100F indicates an issue with the Brake Pedal Angle Sensor Supply. This is a critical issue as it directly affects the braking system's performance.</p><ul><li><b>Immediate Actions:</b> Inspect and repair the brake pedal angle sensor and its wiring.</li><li><b>Potential Risks:</b> Delayed repair can lead to brake failure, increasing the risk of accidents.</li></ul>