ABS Pump 47070-48080 47070-48070 Lexus RX450 Hybrid GYL20 GYL25 2017-

Part Name: ABS Pump / Brake Booster Pump

Part Number: 47070-48080， 47070-48070，707048080， 4707048070

Applications:

Lexus RX450 Hybrid GYL20，GYL25  2017 - 2018

What is a ABS Pump?
ABS units have a pump that helps maintain proper pressure in the hydraulic brakes. The ABS ECU module receives input from wheel speed sensors to detect wheel slip and sends a signal to hydraulic valves to release pressure to prevent slip. When this happens, the pump in the ABS unit is used to restore the pressure lost in the brake system. The ABS controller regulates the action of the pump to ensure optimum pressure and minimize slippage.
Following is our drawings with technical requirement for your understanding:

1. Symptoms of a failed ABS Pump.

Fortunately, there are some signs you can look out to detect possible problems with your ABS pump.
◆ ABS Warning Light or Engine Light:   A common sign is the ABS warning light or check engine light on the dashboard. Typically, an orange ABS light indicates a pump problem that needs attention. On older vehicles, the check engine light may come on, indicating a potential problem with the ABS system.
◆ Unresponsive Brake Pedal:  Another indicator of a faulty ABS pump is an unresponsive brake pedal. If you notice that your brake pedal is not as responsive as it used to be, or takes longer to depress, it could be a sign of a pump failure. It is important to seek service as soon as possible to avoid a potentially dangerous situation where the brake pedal becomes completely unresponsive.
◆ Harder Braking:  If your brake pedal requires more force than usual to apply the brakes, or if your brakes lock up during normal driving, this is another sign that there may be a problem with the ABS pump. If you experience this problem, it is crucial to seek professional help, especially if you notice strange clicking noises.

◆ Speedometer showing wrong speed:   Finally, a malfunctioning speedometer showing the wrong speed or reading 0 MPH may also indicate a problem with the ABS pump. While this problem usually accompanies the ABS warning light or check engine light, even if the dashboard light doesn't come on, you should still take your car to a professional for diagnosis.

2. Common failure and troubleshooting

Fault Type	Root Cause	Solution
Abnormal Noise	1. Pump expired service life, internal parts worn 2. Brake fluid unqualified (moisture, impurities, abnormal viscosity) 3. Loose & unsealed inlet/outlet pipe joints	1. Replace worn parts or full ABS pump 2. Use manufacturer-recommended brake fluid 3. Check and tighten all connecting connectors
No Pressure / Poor Oil Absorption / No Operation	1. Air trapped inside system during installation 2. Pipeline joint leakage 3. Low brake fluid in reservoir 4. Long-term use causes piston wear & internal oil leakage	1. Pre-fill brake fluid at inlet before installation; fasten inlet pipe, cycle ABS pump repeatedly until fluid sprays fully from outlet, then connect outlet pipe 2. Inspect and tighten all pipe connectors 3. Refill fluid to marked standard level 4. Replace worn parts or full ABS pump
Low Flow Rate	1. Piston failure 2. Pipeline Blocked 3. Loose reservoir, poor sealing or pipeline leakage 4. Insufficient motor speed	1. Remove and replace piston 2. Inspect and clean clogged pipeline 3. Check reservoir and pipes; reinstall or replace sealing ring if detached 4. Replace the motor
Oil Leakage	1. Failed piston sealing ring on pump body 2. Damaged shaft-end oil seal/bearing seal 3. Pump body casting sand holes	1. Replace piston sealing ring 2. Replace the brake pump 3. Replace the brake pump