How to replace two rear wheel ABS sensors?
To replace the rear ABS sensors, perform the following steps:
Remove the decorative plate: first, need to remove the decorative plate at the position of the rear threshold. This usually involves unclipping and unscrewing. After the removal of these two interior panels is completed, the plug of the ABS sensor will be exposed.
Remove the tire: Next, remove the right rear wheel, for a clearer view of the lower half of the sensor.
Replace the sensor: After the right rear wheel is removed, can be seen the lower part of the ABS sensor, can be replaced with a new sensor.
Check the clearance: Use a non-iron feeler to check the clearance between the top of the sensor and the elastic wheel, and check this clearance at several locations on the wheel hub.
Remove the caliper and disc: , if necessary, also remove the caliper and disc.
Install the retaining bolts: place the new sensor in the support, and install the retaining bolts.
Reinstall the trim and tire: After you have finished replacing the sensor, reinstall the trim and tire in reverse order.
Note:
During disassembly it may be necessary to lift the car for better observation and operation. ABS sensors are usually located on the inside of automobile tires, , therefore, requires special attention during removal and installation.
When removing the right rear wheel, can clearly see the lower part of the sensor, at this time, you can replace the new sensor. The removal process also includes steps to remove the tire.
After lifting the vehicle using a jack, remove the hub and place it under the vehicle. Then find the location of the sensor, for the left front wheel it is on the right rear of the brake disc. Gently push up the buckle at the top using a flat-head screwdriver and can be easily unplugged. If you do not pull out the plug, will not be able to remove the screws in place. After unplugging use the hex socket tool to remove the old sensor.
Is the abs sensor front and back?
ABS sensor is indeed divided into front and back. ABS sensor is divided into front wheel and rear wheel according to the different position of the wheel, the front wheel has left and right points, the rear wheel also has left and right points.
The main function of ABS sensor is to maintain the stability of the vehicle when braking sharply, prevent the vehicle from sideswipe and deviation, thus shortening the braking distance and making the driving more stable. Each wheel is equipped with an ABS sensor, so a car has a total of four ABS sensors, each mounted on the four wheels.
On the logo, the position of the ABS sensor can be indicated by a specific identifier. For example, HR or RR means back right, HL or LR means back left, VR or RF means front right, and VL or LF means front left. In addition, HZ represents the dual lines of the brake master pump, where HZ1 is the first circuit of the master pump and HZ2 is the second circuit.
Fault causes of the abs sensor
The fault of the ABS sensor may be caused by the following reasons:
1. Loose plug of ABS system: This may cause the system to not work normally, the solution is to check and plug tightly.
2. The gear ring of the speed sensor half-shaft is dirty: if the gear ring is stuck with iron filings or magnetic substances, it will affect the sensor to read data, and the gear ring of the half-shaft needs to be cleaned.
3. Abnormal battery voltage or blown fuse: Excessive voltage or blown fuse may cause ABS failure. In this case, repair the battery or replace the fuse.
4. Electronic control device failure: such as automatic dimmer damage or light fuse blown, need to go to a professional repair shop for repair.
5. Hydraulic adjustment device problems: may be caused by casting defects, sealing ring damage, loosening of fastening bolts or aging of valve eardrum, etc., need to be repaired by professional maintenance factory.
6. Line connection fault: Loose plug of the wheel speed sensor may cause ABS light to turn on, and the circuit needs to be repaired in time.
7. ABS control unit programming problem: data mismatch or error may lead to ABS failure, need to use a special detection computer to readjust the data.
8. ABS master pump failure: The master pump drives the ABS system operation, if the failure will lead to system failure, need to repair or replace the ABS master pump.
9. Sensor fault: The sensor has a break or short circuit problem, need to check the specific cause and maintenance.
10. The line connection failure between the wheel speed sensor and the ABS control unit: the speed signal is abnormal, and the wiring needs to be readjust.
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