Step
|
Action
|
Yes
|
No
|
DEFINITION: Brake fluid level is low not related to lining
wear.
|
1
|
Were you sent here from the Hydraulic Brake Symptom table?
|
Go to Step 2
|
-
|
2
|
|
1. |
Inspect the following hydraulic brake system
components for brake fluid leaks: |
| • |
Flexible brake hose connections; threaded and
bolted |
| • |
Flexible brake hose crimp joints |
| • |
Wheel cylinder piston seals, if equipped |
| • |
Master cylinder reservoir |
| • |
Master cylinder reservoir low pressure hose, if
equipped |
| • |
Brake pressure modulator valve (BPMV) assembly, if
equipped |
Did you find and correct a condition?
|
Go to Step 8
|
Go to Step 3
|
3
|
Is the vehicle equipped with a vacuum brake booster?
|
Go to Step 4
|
Go to Step 6
|
4
|
|
1. |
Disconnect the vacuum check valve from the booster
to relieve vacuum reserve. |
|
2. |
Separate the master cylinder from the vacuum brake
booster. Do not disconnect any brake pipes. |
|
3. |
Inspect the rear of the master cylinder for a
brake fluid leak. |
|
4. |
Inspect for brake fluid in the vacuum brake
booster. |
Did you find a brake fluid leak?
|
Go to Step 5
|
-
|
5
|
Replace the brake master cylinder and the vacuum brake
booster.
Did you complete the replacement?
|
Go to Step 8
|
-
|
6
|
|
1. |
Wipe clean the external surface of the master
cylinder to hydraulic brake booster area, if equipped. |
|
2. |
Separate the master cylinder from the hydraulic
brake booster, if equipped. Do not disconnect any brake pipes. |
|
3. |
Inspect the rear of the master cylinder for a
brake fluid leak. |
Did you find a brake fluid leak?
|
Go to Step 7
|
-
|
7
|
Replace the brake master cylinder.
Did you complete the replacement?
|
Go to Step 8
|
-
|
8
|
|
1. |
Install or connect components that were removed or
disconnected during diagnosis. |
Is the condition still present?
|
Go to Step 2
|
System OK
|
