Error C1105 Nissan: complete analysis of the speed sensor fault

When on your dashboard Nissan Qashqai, X-Trail or Teana When the yellow ABS light comes on and a message appears about a malfunction of the braking system, owners are often scared. Code C1105 - This is one of the most common diagnostic codes in the Nissan family of vehicles, indicating a problem with the front wheel speed sensor circuit. This error means that the anti-lock braking system (ABS) control unit does not receive correct signals about the rotation of one of the front wheels, which is critical for the operation of not only ABS, but also the VDC stabilization system.

Ignoring this problem may lead to the fact that in an emergency the system will not be able to prevent wheel locking, increasing the braking distance. However, there is no need to panic in advance, since in most cases the reason lies not in the breakdown of the most expensive unit, but in a simple wiring break, contamination of the sensor, or failure of a simple speed sensor. Understanding the mechanics of the system will allow you to carry out initial diagnostics yourself and save a significant amount on a visit to the service center.

The essence of the problem and the operation of the ABS system

Anti-lock braking system Nissan works on the principle of continuous monitoring of the rotation speed of each wheel. Speed ​​sensors located in the front wheel hubs generate a variable signal, the frequency of which is directly related to how fast the wheel is spinning. If one of these sensors stops transmitting a signal or the signal is distorted, the controller records an error C1105 and disables ABS to prevent false alarms.

Code feature C1105 is that it most often indicates a malfunction of the speed sensor circuit front right wheel (Right Front Wheel Speed ​​Sensor), although in some models and generations it may also refer to the left one. The control unit compares data from the sensors with data from other sensors (for example, a transmission speed sensor) and if the discrepancy exceeds an acceptable threshold, the system generates an error. It is important to understand that the error itself is only a consequence, not a cause, and finding the root of the problem requires a careful approach.

Drivers often notice that the error appears only when driving at certain speeds or after driving on uneven roads. This suggests that the problem is intermittent (periodic) in nature, associated with vibration or a change in the gap between the sensor and the gear ring. It is the breakage of the internal wire core when the steering wheel is bent that is the most common hidden reason for the appearance of code C1105 on Nissan cars of recent years.

The main reasons for the failure

Reasons for the error C1105 can be divided into several categories: from mechanical damage to electrical failures. The most common, but rare reason is a complete failure of the speed sensor. They rarely break on their own since they have no moving parts, but can be damaged by corrosion or stone impact.

Much more often the problem lies in the wiring. The wires running from the sensor to the control unit are subject to constant stress: vibration, temperature changes, exposure to reagents and salt. Over time, the insulation cracks and the copper strands break. Particularly vulnerable are the places where the wire enters the sensor itself and the places where the harness passes near the suspension. Also, damage cannot be ruled out. toothed ring (rotor) on the hub, which may be contaminated with metal shavings or damaged by corrosion.

• 🔩Damage postings or broken contacts in the speed sensor harness.
• 🦠 Severe contamination or magnetization of the head ABS sensor metal dust.
• ⚙️ Wear or damage ring gear wheel hubs.
• 🔌 Oxidation of contacts in the connector for connecting to the control unit ABS.

In some cases, the error may be false and occur due to problems with the battery. If the voltage in the on-board network drops below a critical level, the control unit may incorrectly read data from the sensors. Therefore, before starting a deep diagnosis, always check the condition of the battery and generator.

Symptoms and associated signs

The first and main symptom is the lamp coming on. ABS on the dashboard. On many models Nissan the lamp may light up along with it VDC OFF (stability control system), since these systems are closely related and use common sensors. Sometimes the message “Check ABS” or “Service Engine Soon” may appear on the on-board computer display.

The second sign may be a change in the behavior of the brakes during emergency braking. If ABS is disabled due to an error C1105, the wheel on which the sensor is faulty may lock earlier than others, which will lead to the car skidding. This is especially dangerous on slippery surfaces. In addition, some modern models may disable the automatic start-stop function or limit the operation of the hill descent assist system.

Drivers often notice that the error does not appear immediately, but after the engine warms up or when driving on a bad road. This is an important diagnostic sign, indicating poor contact, which is restored when heated or, conversely, disappears during vibration. If you feel like your brake pedal is behaving differently than usual or hear strange noises when braking, you should stop immediately and have the system checked.

Do-it-yourself step-by-step diagnostics

For self-diagnosis, you will need a multimeter, an OBD2 scanner (preferably a professional one that can read data in real time) and a set of wheel removal tools. Start with a visual inspection. Lift the front wheel where the problem is indicated (usually the right one) and inspect the speed sensor wiring from where the sensor exits to the first splitter.

Inspect connector sensor: whether there are any traces of oxidation, moisture or mechanical damage. Carefully disconnect the connector and check the contacts for corrosion. If the contacts look clean, proceed to measuring the sensor resistance. To do this, switch the multimeter to resistance measurement mode (Ohm) and connect the probes to the sensor contacts.

Normal resistance for sensors Nissan usually ranges from 800 to 1800 ohms (the exact value depends on the model and year of manufacture). If the resistance is infinite (open) or zero (short), the sensor is faulty. Also check the resistance between each sensor contact and ground (car body): it should be infinite. If there is a breakdown to ground, the sensor needs to be changed.

If the resistance is normal, the problem may be in the wiring to the control unit. You need to check the continuity of the circuit from the sensor connector to the ABS unit connector. Use the multimeter's continuity mode. Pay special attention to areas where the wiring runs through the wheel arch or bends when turning the steering wheel. In some models, the wire simply breaks inside the insulation, which is visually invisible.

What to do if the sensor is new, but the error has not disappeared?

Sometimes even a new sensor may not work due to incompatibility or defects. It is also worth checking that it is installed correctly: the gap between the sensor and the toothed ring should be minimal, but not touching. If the sensor is not securely attached, vibration may cause signal interruption. Another cause is damage to the hub toothed ring, which can become warped or rusted over time, interfering with the signal. In this case, replacing the sensor will not help; repair or replacement of the hub assembly will be required.

Don't forget to check the ABS control unit itself. Sometimes the problem lies in the oxidation of the contacts inside the connector of the unit itself, which is often located in the engine compartment and is exposed to water and dirt. If you see traces of moisture inside the connector, carefully clean it and dry it.

Methods for repairing and replacing components

If the diagnostics showed that the speed sensor, it needs to be replaced. The replacement procedure is relatively simple: unscrew the sensor mount, disconnect the connector and remove the old element. Install the new sensor, making sure that it fits tightly and without distortion. Secure it with a bolt and connect the connector.

If the problem is in the wiring, you can try to repair it if the break is in an accessible location. Clean the damaged area, solder the wires and carefully insulate the repair area with heat shrink or high-quality electrical tape. However, if the wiring is damaged over a long distance or has many signs of corrosion, it is better to replace the entire harness or at least its damaged section to avoid repeated problems in the future.

• 🛠️ Use only original spare parts or high-quality analogues from trusted brands.
• 💧 Be sure to apply dielectric grease to the connectors to protect them from moisture.
• 🔧 When replacing the sensor, check the condition of the gear ring on the hub.
• 🧹 Clean the seat from rust and dirt before installing a new element.

In cases where the gear ring (rotor) is damaged, repairs may require replacing the hub assembly, as the rings are often not sold separately. This is a more labor intensive job and requires removal of the brake caliper and hub. Make sure the new ring has clear teeth and is free of corrosion.

Error reset procedure and testing

After eliminating the physical cause of the malfunction, you must reset the error code C1105 from the control unit memory. To do this, use the OBD2 diagnostic scanner. Connect the device to the OBD connector (usually located under the steering column), turn on the ignition and select the "Clear Codes" or "Error Reset" function from the menu.

If you don't have a professional scanner, you can try disconnecting the battery terminal for 10-15 minutes. However, this method is not always effective, as some control units retain errors even after the power is turned off. Additionally, resetting the power may reset other vehicle settings, such as the clock time or radio settings.

After resetting the error, carry out a test drive. Accelerate to a speed of 20-30 km/h and drive a few kilometers for the system to perform a self-test. If the lamp ABS does not light up again, which means the problem is solved. If the error returns immediately or after a short time, it means that the diagnosis was carried out incompletely, and the cause needs to be looked for deeper, perhaps in the ABS control unit itself.

⚠️ Attention! Use extreme caution when working on the ABS system. Improper intervention in the braking system can lead to complete brake failure during emergency braking. If you are not confident in your abilities, it is better to entrust diagnostics and repairs to professionals.

Prevention and care of the ABS system

To avoid the error C1105 In the future, regularly pay attention to the condition of the suspension and braking system. Wash your car, especially in winter, to remove salt and reagents that accelerate corrosion of contacts and wiring. When replacing brake pads and discs, pay attention to the condition of the ABS sensors so as not to accidentally damage them during operation.

Use high-quality consumables and monitor the condition of your tires. Uneven tire wear or different tire pressures can create false signals that the system perceives as a sensor failure. Also periodically check the tightness of the sensor mounts, as vibration can loosen them over time.

If you frequently drive off-road or on dirt roads, it is recommended that you periodically inspect the ABS wiring harnesses for damage. Small pebbles and dirt can damage the insulation, leading to failure over time. Timely cleaning and lubrication of contacts in connectors will extend the life of your car's electronics.

How often should ABS sensors be checked?

It is recommended to carry out a visual inspection of ABS sensors and their wiring during each vehicle maintenance, that is, once every 10-15 thousand kilometers. This will help identify early signs of insulation wear or damage before they lead to complete system failure.

FAQ: Frequently asked questions

Is it possible to drive with error code C1105?

Technically, the car will continue to drive, since the main braking system (hydraulic) operates independently of the ABS. However, the anti-lock braking system will be disabled, increasing the risk of skidding when braking hard on slippery surfaces. You can drive, but with extreme caution, until the problem is eliminated.

Why does error code C1105 only appear in cold weather?

This is often due to changes in the physical properties of materials. In cold weather, wiring becomes stiffer and insulation can crack. Also, condensation in the connectors when freezing can disrupt the contact. When the car warms up, the problem may temporarily disappear.

How much does it cost to replace an ABS sensor on a Nissan?

The cost of the original sensor varies from 2000 to 5000 rubles, depending on the model. The replacement labor is usually inexpensive as it is a simple procedure without the need to remove the hub. In the service, the total amount can be 4000-8000 rubles.

Could error code C1105 be related to tire sizes?

Yes, if you have installed tires of a different diameter than the manufacturer recommends, or if the tires have different wear, this may cause discrepancies in wheel speed data. The ABS control unit may interpret this as a sensor failure.

Do I need to reflash the ABS unit after replacing the sensor?

Usually not. After replacing the sensor, you can simply reset the error using the scanner. Reflashing is only required in rare cases, if the control unit has a software failure or if you are replacing the unit with another one that is not compatible with the software.