Anti-lock brake system (ABS) is a critical safety feature in a modern vehicle. Nissan Note. When the yellow ABS fault light comes on on the dashboard and the scanner shows an error on the rear wheel, owners are often faced with the need to replace the magnetic ring. A design feature of the rear brakes on many modifications of this hatchback is that the sensor reads information directly from the drum, where a magnetic ring is integrated.
Ignoring this problem can lead to incorrect operation of not only ABS, but also the ESP stability control system, which is completely dependent on wheel speed data. In most cases, the problem is solved by replacing the worn element, but sometimes complex diagnostics of the wiring or the sensor itself are required. Understanding the design of the unit will help you save time and money during repairs.
Design features of the ABS sensor on Nissan Note
Unlike the front wheels, where the sensor is often mounted separately, on the rear drum Nissan Note The magnetic ring is an integral part of the brake drum itself or is pressed into its inner surface. This ring is a multi-pole magnet, the rotation of which creates an alternating current in the sensor coil. The faster the wheel rotates, the higher the frequency of the signal entering the control unit.
The wheel speed sensor is a passive component that does not require external power. Its operation is based on the principle of electromagnetic induction. Any disruption of the integrity of the magnetic field, caused by damage to the ring or contamination of the gap, leads to signal distortion. As a result, the electronic control unit (ECU) stops receiving correct data about the rotation of the rear wheel.
Unfortunately, the design is not without its shortcomings. Metal dust from brake linings, moisture and road chemicals penetrate inside the drum over time. This leads to oxidation of the sensor contacts or, more often, to physical wear of the magnetic poles of the ring. Owners Nissan Note They often complain that the ABS error appears after driving through puddles or a car wash.
Main symptoms of malfunction and causes of errors
The first and most obvious sign of a problem is the ABS light on the instrument panel coming on. However, this may be accompanied by other symptoms that are difficult to immediately associate with the braking system. For example, when braking hard on a slippery road, you may feel that the wheels are locking, although the brake pedal does not pulsate as it should when the system is activated.
Often the error only appears when driving at a speed above a certain threshold, for example, after 20 km/h. This is due to the fact that at low speeds the ECU can ignore inconsistencies in the signals, but when accelerating, the difference in sensor readings becomes critical. If you hear a characteristic cracking or knocking sound from under the rear wheel, this may indicate mechanical damage to the sensor or its wiring.
- 🚨 The ABS light is constantly on or flashes when the engine starts.
- 📉 The ESP system does not activate or displays the “ESP malfunction” error.
- 🔧 During diagnostics, the scanner detects an open circuit or short circuit on one of the rear wheels.
Diagnostics: how to accurately determine the cause of a breakdown
Before you go to the store for a new spare part, you need to conduct a thorough diagnosis. Simply replacing the ring on the drum is not always a solution to the problem, since the reason may lie in the wiring or the sensor itself. Use a diagnostic scanner to read a specific trouble code, such as C1145 (Right Rear Wheel Sensor Malfunction).
The next step is a visual inspection. Remove the wheel and drum to access the assembly. Check the condition of the sensor wire: it should be intact, without insulation cracks or signs of overheating. Inspect the connector for connecting to the computer - the contacts often oxidize due to moisture.
To check the sensor itself you will need a multimeter. Measure the resistance of the sensor winding. The normal value is usually in the range from 1000 to 2500 Ohms, but it is better to check the exact numbers in the service documentation for your specific modification Nissan Note. If the resistance is infinite or zero, the sensor is faulty.
- C1105 (Left front)
- C1115 (Right front)
- C1145 (Right rear)
- C1155 (Left rear)
Why replacing just the ring is a difficult task
Many car owners are looking for a way to replace only the magnetic ring to save money. However, in practice this is fraught with enormous difficulties. The ring is often seated in the groove of the drum with a large interference fit or glued with a special heat-resistant glue. It is extremely difficult to clean it without damaging its magnetic properties.
If you attempt to mechanically remove the ring, there is a high probability of damaging the surface of the drum, which will make it unsuitable for installing new brake pads. In addition, even a microscopic crack in the magnet will cause the sensor to produce incorrect data. It is important to understand that at most manufacturing plants, a drum with an ABS ring is considered a non-separable unit and is sold only assembled.
There is an alternative option - using universal magnetic rings that are glued on top of the old drum. But this method requires pinpoint precision during installation. Any deviation from the factory clearance between the sensor and the ring will cause the ABS system to fail again. The risk of re-breakage with such repairs is very high.
Can I use a ring from another car?
No, the pole pitch and diameter of the magnetic ring are strictly individual for each model. Using a non-standard ring will result in incorrect speed readings and block the ABS system.
Step-by-step instructions for replacing the rear drum assembly
The most reliable solution is to replace the entire brake drum assembly with a new ABS ring. This ensures that the system is restored to factory specifications. The replacement process requires accuracy and a basic set of tools.
First you need to lift the car and remove the rear wheel. Then unscrew the drum guide pins. If the drum is stuck, use special pullers or gently tap a hammer through a wooden spacer on the inside of the drum to move it out of place. Do not hit the edges or the ABS sensor!
Before installing a new drum, be sure to clean the hub from rust and dirt. Lubricate the seat with a special high-temperature grease to avoid sticking in the future. Install the new drum, check for free rotation and tighten the guide pins.
☑️ Drum replacement process
Setting up and checking after repair
After installing a new unit, it is necessary to clear errors from the ECU memory. To do this, connect the diagnostic scanner and perform the reset procedure. Even if the lamp goes out on its own, it is better to make sure that there are no accumulated errors in the memory that may return during the next startup cycle.
Take it for a test drive. Accelerate the car to 40-50 km/h and brake gently several times to check the ABS operation. Pay attention to the absence of extraneous noise and vibrations. If the system is working correctly, the ABS light should not come on.
It is also recommended to check the operation of the sensors on all wheels to eliminate hidden problems. Sometimes replacing one drum will reveal wiring wear on the other wheel that will show up later. A complete check of all components will ensure your safety on the road.
- ✅ Make sure that the gap between the sensor and the ring is normal (usually 0.5-1.5 mm).
- ✅ Check the integrity of the wiring and the absence of short circuits to ground.
- ✅ Test the operation of ESP when maneuvering on a safe section of the road.
Replacing the brake drum assembly is the most reliable way to eliminate an ABS error, ensuring that the geometry and magnetic properties of the assembly are preserved.
Compatibility table and typical error codes
Below is a table with the main error codes that can occur if the ABS ring on the rear drum is faulty, as well as recommendations for interpreting them.
| Error code | Description of the problem | Probable Cause | Recommended Action |
|---|---|---|---|
| C1145 | Right rear wheel sensor malfunction | Open circuit, short circuit, ring wear | Replacing the drum assembly |
| C1155 | Left rear wheel sensor malfunction | Open circuit, short circuit, ring wear | Replacing the drum assembly |
| C1177 | Rear wheel sensor signal is not consistent | Various ring wear, dirt | Cleaning or replacing both drums |
| C1201 | Traction control system error | ABS fault affecting ESP | ABS diagnostics, error reset |
⚠️ Warning: Never attempt to clean or repair the magnetic ring with abrasive materials. This will destroy the magnetic properties and render the sensor inoperable.
⚠️ Attention: When purchasing a drum, make sure it is marked "ABS" or "VDC". Some cheap analogues may not have a magnetic ring, which will lead to a permanent error.
When replacing a drum, always replace the ABS sensor as well, as the old sensor may have been damaged by a worn ring and continue to produce incorrect signals.
Selection of quality spare parts: original or analogue
There are many offers from various manufacturers on the auto parts market. Original drum Nissan will always cost more, but it guarantees a perfect match between magnetic characteristics and geometry. This is especially important for high precision systems such as ESP.
Analogs from trusted brands such as TRW, ATE or Galfer, can be a worthy replacement. However, when choosing an analogue, you must carefully check the presence of a magnetic ring and its parameters. Cheap Chinese counterfeits often do not have a ring at all or use low-quality magnets that quickly lose their properties.
Some owners practice installing only the sensor from the original drum on a new non-original one, if the latter has a suitable fit. This is a compromise that requires careful clearance checking and testing before use.
⚠️ Attention: Avoid purchasing drums without specifying the ABS ring manufacturer. The absence of magnetic markings makes installation impossible for systems with active sensors.
FAQ: Frequently asked questions
Is it possible to drive with the ABS light on?
The car will technically brake as normal, but the anti-lock brakes will not function. In an emergency on a slippery road, the wheels may lock, resulting in loss of control. You can drive, but with extreme caution and the problem must be corrected as soon as possible.
How much does it cost to replace an ABS ring on a Nissan Note?
The cost varies greatly. Replacing just the sensor (if it is separate) will cost less, but often the entire drum needs to be replaced. The price of a drum assembly with a ring can range from 3,000 to 8,000 rubles, depending on the manufacturer and region. The work of a master usually costs 1500-2500 rubles per wheel.
Why does the error only appear on wet roads?
Moisture can penetrate the sensor connector or the coil itself, causing a temporary short circuit or change in resistance. Water can also get into the gap between the sensor and the ring, distorting the magnetic field. This is a characteristic sign of worn wiring insulation or damaged seals.
Do I need to do a wheel alignment after replacing the drums?
No, replacing drums does not affect wheel alignment. Wheel alignment is only required when replacing suspension arms, ball joints, or after serious impacts to the wheel.
Can I replace the ABS ring myself?
Theoretically it is possible if you have experience working with magnetic materials and precise tools. However, the risk of damaging the drum or ring is too great. Most experts strongly recommend changing the entire assembly to guarantee results.
Correct diagnosis and timely replacement of worn-out elements of the ABS system Nissan Note will ensure your safety and comfort while driving. Do not ignore the vehicle signals, as a working brake system is the key to your life and the lives of your passengers.