Pinpoint Test E: Brake Fluid Level Low With Fluid Residue Evident On The Anti-Lock Brake System (Abs) Control Module

E1: 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.
1. 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
2. Start the engine
3. Apply the brake pedal with a hard, sustained pressure
4. 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 E2
E2: BRAKE FLUID LEVEL LOW WITH FLUID RESIDUE EVIDENT ON THE ANTI-LOCK BRAKE SYSTEM (ABS) CONTROL MODULE 2
1. 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 E3
  
  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
E3: BRAKE FLUID LEVEL LOW WITH FLUID RESIDUE EVIDENT ON THE ANTI-LOCK BRAKE SYSTEM (ABS) CONTROL MODULE 3
1. 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

Brake Disc Corrosion Inspection

NOTE:

Jaguar Land Rover braking systems are designed to achieve peak performance under a broad range of driving conditions. Jaguar Land Rover's priority is the safety of its braking systems, and they are designed to perform in all circumstances, however the brake may, dependent on the environment and driving style, produce the occasional noise. This does not impair the operation or performance. Brake noise is an issue facing many vehicle manufacturers and Jaguar Land Rover are constantly working in conjunction with the leading brake caliper and brake pad suppliers to develop design solutions which reduce brake squeal noises.
Jaguar Land Rover Limited offers no warranty and is not responsible for any repair or replacement to the vehicle, part or accessory that is required as a direct result of: Normal wear and tear this includes brake pads, brake discs, and any other friction related components. The list is not exhaustive. Defects or damage caused as a result of the vehicle being used in motor sport events, or for any purpose other than normal, private, or commercial use. Brake pads, brake discs, and any other friction related components are covered against manufacturing defects for the duration of the manufacturer's warranty.
Most JLR brake pads now utilize NAO brake pad friction material technology. This creates a 'transfer layer' on the brake disc, whereas previous brake pads use an abrasive friction mechanism, which leads to greater pad and disc wear. This NAO transfer layer has a dull metallic appearance.
However, some situations with low brake usage, or through the use of non-JLR approved wheel cleaners, can lead to a build up of surface corrosion on the disc (see guidance below and in workshop information D & T) - this surface corrosion build-up does not adversely affect brake performance.

	EXAMPLE IMAGES	DESCRIPTION
1.	Courtesy of JAGUAR LAND ROVER NORTH AMERICA, LLC	NOTE: If the brake disc(s) is similar to illustration E245239, This is not a manufacturing defect and is not covered under warranty. Light corrosion - If the disc(s) condition is as illustrated and within the service wear limit. This is not detrimental to braking performance and brake disc replacement is not required.
2.	Courtesy of JAGUAR LAND ROVER NORTH AMERICA, LLC	NOTE: If the brake disc(s) is similar to illustration E245550, This is not a manufacturing defect and is not covered under warranty. Light corrosion - If the disc(s) condition is as illustrated and within the service wear limit. This is not detrimental to braking performance and brake disc replacement is not required.
3.	Courtesy of JAGUAR LAND ROVER NORTH AMERICA, LLC	NOTE: If the brake disc(s) is similar to illustration E245238, This is not a manufacturing defect and is not covered under warranty. Moderate corrosion - If the disc(s) condition is as illustrated and within the service wear limit. This is not detrimental to braking performance and brake disc replacement is not required.
4.	Courtesy of JAGUAR LAND ROVER NORTH AMERICA, LLC	NOTE: If the brake disc(s) is similar to illustration E245551, This is not a manufacturing defect and is not covered under warranty. Uneven corrosion with pitting - If the disc(s) condition is as illustrated and within the service wear limit. This is not detrimental to braking performance and brake disc replacement is not required.
5.	Courtesy of JAGUAR LAND ROVER NORTH AMERICA, LLC	NOTE: If the brake disc(s) is similar to illustration E245552, This is not a manufacturing defect and is not covered under warranty. Uneven corrosion with pitting - If the disc(s) condition is as illustrated and within the service wear limit. This is not detrimental to braking performance and brake disc replacement is not required.
6.	Courtesy of JAGUAR LAND ROVER NORTH AMERICA, LLC	Brake pad to brake disc surface contact area measurement instruction Section (A) is 100% of the brake disc working surface. To workout 30% section (B) of the brake disc working surface follow the below steps. Step 1. Measure section (A) of the brake disc working surface. Example 60 mm. Step 2. Divide the measurement from step 1 by 100. Example 60 mm ÷ 100 = 0.6 mm. Step 3. Multiply the total of step 2 by 30. Example 0.6 mm x 30 = 18 mm Step 4. This will give 30% section (B) of the brake disc working surface. Example 18 mm.
7.	Courtesy of JAGUAR LAND ROVER NORTH AMERICA, LLC	NOTE: If the brake disc(s) is similar to illustration E245240, This is not a manufacturing defect and is not covered under warranty. Heavy pitting with corrosion - It is not necessary to replace the disc unless the corroded region covers more than 30% of the brake disc working surface.
8.	Courtesy of JAGUAR LAND ROVER NORTH AMERICA, LLC	NOTE: Brake discs are recommended to be replaced in axle sets. Severe pitting and corrosion - If the disc(s) condition is similar to the illustration. Replace the brake discs.
9.	It is not necessary to replace the brake disc if scored, and disc thickness is within the service wear limit.	For cases where disc scoring is caused by contact between the brake pad backplate and the disc due to excessive pad wear, replace the brake disc's and pads.
10.	Courtesy of JAGUAR LAND ROVER NORTH AMERICA, LLCJAGUAR LAND ROVER NORTH AMERICA, LLC Courtesy of JAGUAR LAND ROVER NORTH AMERICA, LLCJAGUAR LAND ROVER NORTH AMERICA, LLC	NOTE: The use of non-JLR approved wheel cleaners can cause accelerated corrosion of the brake disc. Use of non-JLR wheel cleaners - Evidence of use of non-JLR approved cleaners may be indicated where discoloration/corrosion of brake caliper/springs occurs. The pictures shown illustrate typical calipers on vehicles that are corroded due to using unsuitable cleaning agents Corroded calipers, due to using unsuitable cleaning agents, are NOT covered by warranty.