Pinpoint Test Q: Brake Fluid Level Low With Fluid Residue Evident On The Anti-Lock Brake System (Abs) Control Module
- Q1: BRAKE FLUID LEVEL LOW WITH FLUID RESIDUE EVIDENT ON THE ANTI-LOCK BRAKE SYSTEM (ABS) CONTROL MODULE 1 NOTE: It is most likely a brake pipe or brake pipe nut that is the cause of the brake fluid leak. Always check for damaged pipes and loose or cross threaded brake pipe nuts before condemning the Anti-lock Brake System (ABS) control module.
- Clean all brake fluid residue from the brake pipes and brake pipe nuts connected to the Anti-lock Brake System (ABS) control module hydraulic control unit
- Start the engine
- Apply the brake pedal with a hard, sustained pressure
- Check components and brake pipes for leaking fluid on to the Anti-lock Brake System (ABS) control module
Is a leak evident from a component or pipe?
Yes
Repair the component or pipe as necessary and retest
No
GO to Q2.
- Q2: BRAKE FLUID LEVEL LOW WITH FLUID RESIDUE EVIDENT ON THE ANTI-LOCK BRAKE SYSTEM (ABS) CONTROL MODULE 2
- Check brake pipe nuts for signs of a fluid leak
Is a leak evident from a brake pipe nut connection to the Anti-lock Brake System (ABS) control module hydraulic control unit?
Yes
GO to Q3.
No
Identify where the Anti-lock Brake System (ABS) control module hydraulic unit is leaking from. Take clear photographs of the leaking area and submit the image with an EPQR Install a new Anti-lock Brake System (ABS) control module as necessary
- Check brake pipe nuts for signs of a fluid leak
- Q3: BRAKE FLUID LEVEL LOW WITH FLUID RESIDUE EVIDENT ON THE ANTI-LOCK BRAKE SYSTEM (ABS) CONTROL MODULE 3
- If the leak is evident from a brake pipe nut, confirm if the nut is loose or has been cross threaded Has the leaking brake pipe nut been cross threaded?
Yes
Install a new brake pipe, brake pipe nut and Anti-lock Brake System (ABS) control module. If the cross thread condition is thought to be a factory build issue, take clear photographs of the components and submit an EPQR
No
Inspect the condition of the cone end of the leaking brake pipe. Replace the pipe as necessary. Make sure the brake pipe nut rotates freely when it is pressed up against the brake pipe cone. When the brake pipe is inserted in to the Anti-lock Brake System (ABS) control module hydraulic control unit, make sure there is no side load on the pipe. Tighten the brake pipe nut to the specified torque. If a loose brake pipe nut is thought to be a factory build issue, submit an EPQR
- If the leak is evident from a brake pipe nut, confirm if the nut is loose or has been cross threaded Has the leaking brake pipe nut been cross threaded?